KR101576581B1 - System and method for processing signal in a wireless network - Google Patents

Abstract

A call processing system in a wireless network according to an embodiment of the present invention divides a frequency band of a macrocell into at least two frequency regions, and a data FA for processing a data call using at least one of the divided frequency regions And a femtocell base station for processing a data call generated in the femtocell using the macro base station and the femtocell data FA having the same frequency range as the data FA in the macro base station.
As described above, according to the present invention, a data call of a mobile communication terminal in a femtocell region is processed using a frequency region for processing a data call in a macro cell, and a voice call of all mobile communication terminals in a macro cell including a femto cell is converted into a frequency It is possible to distribute the data traffic to the femtocells having different channel capacities and to accommodate the data traffic, thereby increasing the capacity of the data traffic in the entire network.

Description

TECHNICAL FIELD [0001] The present invention relates to a system and a method for processing a call in a wireless network,

The present invention relates to a call processing in a wireless network, and more particularly, to a method and apparatus for processing a data call of a mobile communication terminal in a macro cell including a plurality of femtocells into a frequency region having the same frequency band in a femtocell and a macrocell To a system and method for call processing in a wireless network capable of processing a voice call into a frequency domain used in macrocells.

As the technology of mobile communication evolves to 2G, 3G, and 4G generation, the increase of transmission rate for wireless Internet access has become a factor of important development.

In particular, WCDMA High Speed Packet Access (HSPA) guarantees a transmission speed sufficient to provide a practical wireless Internet environment to the user and is currently being operated in a mobile communication network.

Recently, with the launch of various wireless internet terminals such as iPhone, smart phone, and data-oriented marketing such as wireless data rate and corporate wireless data service, wireless data service Are becoming more active.

However, the biggest limitation to the activation of the wireless data service is the capacity of the network that provides the actual wireless data service. This is because the limited channel capacity of the base station itself and the limitation of radio capacity within the coverage area managed by the base station It will be a cause. In other words, since the maximum radio capacity that can be given to all user terminals in one base station area is proposed, when the data service is activated and more users are used at higher speed, the transmission rate per actual subscriber is lowered.

To solve this problem, it is necessary to use separate small cell management devices such as a micro cell, a pico cell femtocell, To the user, thereby increasing the traffic capacity of the entire network.

In particular, a femtocell means a base station for a small mobile communication used in a home or an office such as an office, that is, a small base station having a low output, and provides a wired / wireless fused service by connecting a mobile phone and the Internet to a user. The service area in a normal femtocell is about 20 m in radius. The femtocell improves the communication quality of the room where the coverage of the macrocell is insufficient, or shares the load of the macrocell in the overloaded area. The femtocell has advantages such as reduction of the communication cost for the user.

The femtocell uses specialized technologies such as automatic self-configuration and resolves interference problems between macro cells and femtocells through automatic network planning as well as IP address configuration and security configuration. . At this time, for the automatic cell configuration, the femtocell must be able to operate in the initialization mode or periodically in the sniffer mode. The operation as a detection mode acts as a terminal capable of searching neighboring macro cells and femtocells to set a neighbor cell list, power saving control and frequency, This information can be shared.

In the case of such a femtocell, a call of a mobile communication terminal in a region is processed using a single carrier femto frequency, and in the case of a macro cell, a call of a mobile communication terminal in a region is processed using a macro frequency which is a multi carrier.

However, since the femto frequency signal and the macro frequency signal are mixed in the mobile communication network using the femtocell, the problem of interference between the femto frequency signal and the macro frequency signal and the handover problem exist as technical problems, There is a problem that can not be done. For example, when a mobile communication terminal is handed over from a femtocell area to a macrocell area, the handover is performed while transitioning from a single carrier femto frequency to one of multi-carrier macro frequencies, .

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and it is an object of the present invention to provide a method and apparatus for processing a data call of a mobile communication terminal in a femtocell region using a frequency region for processing a data call in a macrocell, A system and method for processing a call in a wireless network capable of distributing data traffic to a femtocell having a different channel capacity by processing voice calls of all mobile communication terminals in a cell using another region except a frequency region .

The objects of the present invention are not limited to those mentioned above, and other objects not mentioned may be clearly understood by those skilled in the art from the following description.

A call processing system in a wireless network according to an embodiment of the present invention is a system for processing a call in a wireless network composed of macrocells having at least one femtocell, wherein the frequency band of the macrocell is divided into at least two frequency regions, A macro base station for use as a data FA for processing a data call using at least one of the divided frequency regions and a femto cell data FA having the same frequency region as the data FA in the macro base station, And a femtocell base station for processing data calls generated in the femtocell base station.

A call processing system in a wireless network according to an embodiment of the present invention can process a voice call generated in a mobile communication terminal in the femtocell into a frequency domain excluding the data FA.

In a call processing system in a wireless network according to an exemplary embodiment of the present invention, the macro base station uses the data FA when a mobile communication terminal connected with a data call via the femtocell data FA in the femtocell is handed over to the macrocell Thereby connecting the data call of the mobile communication terminal.

A method of processing a call in a wireless network according to an embodiment of the present invention is a method of processing a call in a wireless network comprising macrocells having at least one femtocell, Wherein at least one of the divided frequency bands is used as a data FA for processing a data call, and when there is a voice call request of the mobile communication terminal in the femtocell region, Processing the voice call using the femtocell data FA having the same frequency band as the frequency band of the data FA when there is a data call request of the mobile communication terminal in the femtocell area do.

A method of processing a call in a wireless network according to an embodiment of the present invention is a method for processing a data call of the mobile communication terminal using the data FA when a mobile communication terminal connected with a data call in the femtocell is handed over to the macro cell have.

A method for processing a data call of a mobile communication terminal in a femtocell region using a frequency region for processing a data call in a macro cell and a method for processing a voice call of all mobile communication terminals in a macro cell including a femto cell, It is possible to distribute the data traffic to the femtocell having a separate channel capacity and to accommodate the data traffic, thereby increasing the capacity of the data traffic in the entire network.

In addition, since the frequency bands of the data priority FA used by the femtocell and the macrocell are the same, the mobile communication terminal can perform the handover without a frequency transition process, thereby increasing the success rate of the handover The problem of interference between the macro signal and the femto signal can be solved.

FIG. 1 and FIG. 2 illustrate a preferred frequency allocation technique applied to an embodiment of the present invention,
3 is a diagram illustrating a wireless network structure for explaining a call processing system according to an embodiment of the present invention,
4 is a diagram for explaining interference between signals in call processing of a call processing system according to an embodiment of the present invention,
5 is a flowchart illustrating a call processing procedure of a mobile communication terminal in a wireless network system according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. The following terms are defined in consideration of the functions in the embodiments of the present invention, which may vary depending on the intention of the user, the intention or the custom of the operator. Therefore, the definition should be based on the contents throughout this specification.

Each block of the accompanying block diagrams and combinations of steps of the flowchart may be performed by computer program instructions. These computer program instructions may be loaded into a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus so that the instructions, which may be executed by a processor of a computer or other programmable data processing apparatus, And means for performing the functions described in each step are created. These computer program instructions may also be stored in a computer usable or computer readable memory capable of directing a computer or other programmable data processing apparatus to implement the functionality in a particular manner so that the computer usable or computer readable memory It is also possible for the instructions stored in the block diagram to produce a manufacturing item containing instruction means for performing the functions described in each block or flowchart of the block diagram. Computer program instructions may also be stored on a computer or other programmable data processing equipment so that a series of operating steps may be performed on a computer or other programmable data processing equipment to create a computer- It is also possible that the instructions that perform the processing equipment provide the steps for executing the functions described in each block of the block diagram and at each step of the flowchart.

Also, each block or each step may represent a module, segment, or portion of code that includes one or more executable instructions for executing the specified logical function (s). It should also be noted that in some alternative embodiments, the functions mentioned in the blocks or steps may occur out of order. For example, two blocks or steps shown in succession may in fact be performed substantially concurrently, or the blocks or steps may sometimes be performed in reverse order according to the corresponding function.

Prior to the description, in the embodiment of the present invention, a preferred frequency allocation based technique, which is a frequency operation technique, is used for capacity increase and quality improvement in a macro network.

The preferred frequency allocation scheme is a structure in which a CS call for voice and voice communication and a PS call for wireless data are separately used for respective frequency assignments. That is, as shown in FIG. 1, a voice preference and a dedicated frequency To manage channel resources according to each characteristic, and to reduce the interference between voice / data signals, thereby improving the overall capacity and quality.

First, when a mobile communication terminal connects a data call in a frequency allocation operating condition, a call is firstly connected to a data priority frequency, and in the case of voice, it is allocated to a voice side frequency, resulting in separate operation for each frequency. Also, as shown in FIG. 2, when the load of data or voice frequency allocation is increased due to a plurality of mobile communication terminals, mutual frequency allocation is mixed to support another type of call acceptance function. That is, when FA4, which is a frequency area for processing a data call at a call processing frequency operated by FA1, FA2, FA3, and F4, becomes a full load state, FA1, FA2, and FA3, which are different frequency areas, will be

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

3 is a diagram illustrating a wireless network structure for explaining a call processing system according to an embodiment of the present invention.

3, a wireless network according to an exemplary embodiment of the present invention includes a macro cell 1000, which is a cell of a general cellular system, a macro base station 100, which manages the macro cell 1000, A femtocell 2000 supporting a small environment of one room or a room of a house and a femto base station 200 managing a femtocell 2000 that are smaller than the area of the macrocell 1000. Here, the macro base station 100 may be an eNB (evolved NodeB), and the femto base station 200 may be a home evolved NodeB (eNB).

The femtocell 2000 is intended to provide a higher level data service to more users as well as to be able to serve in-building areas such as coffee shops, restaurants, offices, theaters, underground stores, shopping malls, .

The macro base station 100 managing the macro cell 1000 uses a specific frequency domain such as FA4 as a frequency domain for processing data calls and FA1, FA2 and FA3 as a frequency domain for processing voice calls. That is, the macro base station 100 processes the voice call request of the mobile communication terminal in the macro cell 1000 using the voice priority FA1, FA2, and FA3, and transmits the voice call request to the macro macro 1000 excluding the femtocell 2000 And processes the data call of the mobile communication terminal in the cell 1000 area.

The macro base station 100 processes data and voice calls by dividing a frequency band using a frequency allocation scheme, i.e., processes a voice call or processes a data call using a plurality of macro frequency regions that are multi-carriers. In other words, the macro base station 100 uses the frequency bands FA1, FA2 and FA3 to process the voice call and uses the frequency band of FA4 to process the data call.

The femto base station 200 managing the femtocell 2000 processes only data calls of the mobile communication terminals in the femtocell 2000 area, that is, in the macro base station 100, And processes the data call request of the mobile communication terminal by using FA4 having the bandwidth.

When there is a voice call request from the mobile communication terminal in the femtocell 2000, the voice call is processed using the FA1, FA2, and FA3 frequency bands of the macro base station 100. [

In other words, the femto base station 200 in the femtocell 2000 processes a data call using a signal having the same frequency band as the FA 4 managed by the macro base station 100, and the macro base station 100 processes the femtocell 2000 FA1, FA2, and FA3 in response to a voice call request of the mobile communication terminal in the area of the macro cell 1000,

In this manner, the femto base station 200 processes only the data call request of the mobile communication terminal in the femtocell 2000 using the single carrier femto frequency.

The mobile communication terminal 10 recognizes the data priority FA signal managed by the femto base station 200, the voice priority FA signal managed by the macro base station 100, and the data priority FA signal, FA priority managed in the femto base station 200 to process a data call in the femtocell 2000 region and uses the voice priority FA signal managed in the macro base station 100 to process a voice call. That is, since the mobile communication terminal 10 knows the voice priority FA and the data priority FA, the macro signal (voice priority FA) managed by the macro base station 100 is used in case of a voice call, 2, a femto signal (data priority FA managed in the femto base station 200) is transmitted to a macro signal (data priority signal managed in the macro base station 100) in the femtocell 2000 area The femto signal is used.

When the femto base station 200 and the macro base station 100 use FA4, which is the same frequency band for processing data calls, interference may occur between the femto frequency and the macro frequency. However, in the embodiment of the present invention, When the mobile communication terminal 10 within the femtocell 2000 area tries to connect a data call, the FA4 signal for FA signal processing from the macro base station 100 is transmitted to the femto base station 200, The mobile communication terminal 10 acquires the FA4 signal transmitted from the femto base station 200 in the femtocell 2000 area to connect the data call and transmits the FA4 signal to the femto base station 200 in the case of a voice call, Since the mobile communication terminal 10 only provides a signal for processing a call, the mobile communication terminal 10 transmits a signal for processing a voice call, which is provided from the macro base station 100, Using the signal of FA1, FA2, FA3, connect a voice call.

A handover procedure in a wireless network system according to an embodiment of the present invention will be described below.

In the case of the femtocell 2000 according to the embodiment of the present invention, the voice call is transmitted to the mobile communication terminal 1000 using only the frequency bands FA1, FA2 and FA3 for processing voice calls managed in the macro base station 100 in the macro cell 1000, A separate handover procedure is not required for the mobile communication terminal handed over from the femtocell 2000 to the macrocell 1000 and the data call in the macrocell 1000 is processed in the case of the data call And the frequency band for processing the data call in the femtocell 2000 are the same, handover is possible without a frequency transition.

The femto base station 200 processes the data call of the mobile communication terminal in the femtocell 2000 region and transmits the data call of all mobile communication terminals in the macrocell 1000 including the femtocell 2000, It is possible to distribute the data traffic to the femtocells 2000 having a separate channel capacity and to accommodate the data traffic in the macro base station 100, thereby increasing the capacity of the data traffic in the entire network.

A process of processing a call of a mobile communication terminal in a cell area by the wireless network system having the above configuration will be described with reference to FIG.

5 is a flowchart illustrating a call processing procedure of a mobile communication terminal in a wireless network system according to an embodiment of the present invention.

5, a case where the mobile communication terminal 10 performs call processing in the femtocell 2000 area and handover to the macro cell 1000 will be described as an example.

5, the mobile communication terminal 10 transmits radio resource information FA1, FA2, FA3 and FA4 from the macro base station 100 of the macro cell 1000 (S500) And recognizes the information of available radio resources.

If the mobile communication terminal 10 has a voice call processing request S502 in the femtocell 2000 area, the macro base station 100 transmits the voice call request of the mobile communication terminal 10 in the femtocell 2000 area By using one of FA1, FA2 and FA3, and then processes it (S504).

Meanwhile, when the mobile communication terminal 10 requests the data call processing in the femtocell 2000 area (S506), the signal (femtocell data priority FA) of FA4, which is the data priority FA managed by the femto base station 200, The mobile communication terminal 10 requests the data call using the data priority FA for the femtocell managed by the femto base station 200 and transmits the data call to the femto base station 200 ) Processes the data call request using the data priority FA for the femtocell (S508).

When the mobile communication terminal 10 connected to the data call is handed over from the femtocell 2000 to the macrocell 1000 in step S510, the femto base station 200 transmits the data call to the macro base station 100 through the handover procedure. The mobile communication terminal 10 accesses the data call using the data priority FA managed by the macro base station 100 and transmits the data service to the mobile communication terminal 10. [ (S512).

According to the embodiment of the present invention, since the frequency band of the data priority FA used by the femtocell 2000 and the macrocell 1000 is the same, the mobile communication terminal 10 can perform handover without a frequency transition process, It is possible to increase the success rate of over.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, You will understand. For example, a person skilled in the art can change the material, size and the like of each component according to the application field, or can combine or replace the disclosed embodiments in a form not explicitly disclosed in the embodiment of the present invention. It is to be understood that the invention is not limited to the disclosed embodiments. Therefore, it should be understood that the above-described embodiments are to be considered in all respects as illustrative and not restrictive, and that these modified embodiments are included in the technical idea described in the claims of the present invention.

10: Mobile communication terminal
100: macro base station 200: femtocell base station
1000: macrocell 2000: femtocell

Claims (5)

A call processing system in a wireless network comprising macrocells having at least one femtocell,
A macro base station that divides a frequency band of the macrocell into at least two frequency regions and uses at least one of the divided frequency regions as macrocell data FA for processing a data call;
And a femtocell base station for processing a data call generated in the femtocell using femtocell data FA having the same frequency range as the macrocell data FA,
The macro cell data FA and the femtocell data FA in the femtocell are divided into signal intensities from the macro cell data FA and the femtocell data FA, respectively
A call processing system in a wireless network.
The method according to claim 1,
And processes the voice call generated in the mobile communication terminal in the femtocell into a frequency domain excluding the macrocell-use data FA
A call processing system in a wireless network.
The method according to claim 1,
The macro base station connects the data call of the mobile communication terminal using the macro cell data FA when the mobile communication terminal connected with the data call via the femtocell data FA in the femtocell is handed over to the macro cell
A call processing system in a wireless network.
A method of processing a call in a wireless network system comprising macrocells having at least one femtocell,
Wherein at least one of the divided frequency bands is used as data for macro cells FA for processing a data call,
Processing the voice call using the remaining frequency bands except for the macro cell data FA when there is a voice call request of the mobile communication terminal in the femtocell area;
And processing the data using the femtocell data FA having the same frequency band as the frequency band of the macro cell data FA when there is a data call request of the mobile communication terminal in the femtocell area,
The macro cell data FA and the femtocell data FA in the femtocell are divided into signal strengths from the macro cell data FA and the femtocell data FA,
A method of processing a call in a wireless network.
5. The method of claim 4,
When a mobile communication terminal to which a data call is connected in the femtocell is handed over to the macrocell, the data call of the mobile communication terminal is processed using the data for macrocell FA
A method of processing a call in a wireless network.

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