KR100968866B1 - Apparatus and method for processing traffic in mobile communication systems - Google Patents

Abstract

An apparatus for processing traffic in a mobile communication system according to the present invention sets an operation mode for each terminal based on the location and request service of the terminals, and schedules a traffic request of each terminal based on the operation mode set in the operation mode setting unit. By using a method or a virtual dedicated channel allocation method, it is possible not only to maximize resource efficiency but also to transmit data serviced in different ways through one radio link.

Channel, allocation, traffic, WCDMA, OCHM, OFCHM, ORHM, scheduling

Description

Apparatus and method for processing traffic in mobile communication system {APPARATUS AND METHOD FOR PROCESSING TRAFFIC IN MOBILE COMMUNICATION SYSTEMS}

The present invention relates to a mobile communication system, and more particularly, to an apparatus and method for processing traffic in different modes of operation according to the location of the terminal and the type of the requested service.

In the conventional digital and analog frequency division multiplexing (FDM) communication scheme, a first communication station allocates an available frequency band (FA) to a second communication station when establishing a call regardless of channel activity. The frequency band allocated when the call is released is returned to another second communication station.

In addition, in the conventional communication scheme using time division multiplexing (TDM), the first communication station uses the second communication station to assign a time slot that is not pre-allocated among several time slots in one frequency band at the time of call establishment regardless of channel activity. Assign and communicate with the communication station, return the time slot that was allocated when the call was released, and make it available to other second communication stations.

In addition, the conventional frequency hopping multiplexing (FHM) communication method uses a promised frequency hopping pattern between a first communication station and a second communication station to establish a call regardless of channel activity. Determines whether to allocate a new channel according to the number of channels already allocated.

Conventional orthogonal code division multiplexing (OCDM) uses a conventional Orthogonal Code Division Multiplexing (OCDM) scheme to assign an orthogonal codeword that is not pre-assigned in an orthogonal code group at the time of call establishment regardless of channel activity. The first communication station allocates communication to the second communication station and returns the orthogonal code assigned at the time of release of the call back to the first communication station for use by another second communication station.

Resource allocation in such a communication scheme includes multiplexing based scheduling and non-scheduling. Here, the scheduling scheme is used for 3G mobile communication networks such as HSPDA, 1xEV-DO, VSF-OFCDM, and the non-scheduling scheme is referred to as CDMA2000, WCDMA, Orthogonal Code Hopping Multiplexing (OCHM), OFCHM (Orthogonal). Frequency and code hopping multiplexing, hereinafter referred to as " OFCHM ".

The non-scheduling scheme is a method of equally allocating channels to all communication stations participating in the service. The non-scheduling scheme is a dedicated channel allocation scheme used in CDMA2000 and WCDMA and a virtual dedicated channel allocation scheme used in OCHM and OFCHM. There is a hopping pattern allocation technique that is dedicated channel allocation.

As shown in FIG. 1A, the system to which the scheduling scheme is applied provides a service to a specific user communication station by allocating all resources only to a specific user communication station among a plurality of user communication stations, and to which a non-scheduling technique is applied. The system allocates assignable resources equally to all users, as shown in FIG. 1B.

In the non-scheduling scheme, the dedicated channel allocation scheme is a method of allocating fixed resources to each user terminal as in the conventional 2nd generation mobile communication system, and resources allocated to different user terminals are orthogonal and do not overlap each other. Representative communication methods using a dedicated channel allocation scheme include a CDMA scheme for assigning different codewords to each user terminal, an FDMA scheme for assigning different frequencies to each user terminal, and a different time for each user terminal. And a TDMA scheme for allocating slots.

Meanwhile, the virtual dedicated channel allocation scheme uses a dedicated channel allocation scheme for allocating resources to each user terminal at the same time, and leaps resources instead of fixed resources to each user terminal to prevent some collisions between resources allocated to each user terminal. OCHM and ORHM (Orthogonal Resource Hopping Multiplexing, hereinafter referred to as 'ORHM') for assigning patterns are used. Here, resource hopping pattern allocation means that the user terminal uses different resources over time instead of using the same resources during communication. Accordingly, in OCHM / ORHM, different resources are used for each symbol duration, and which resource is used at each moment is determined by a pre-assigned pattern.

In the case of the dedicated channel allocation method, if a fixed resource is allocated during communication, resource waste may occur because the terminal occupies the resource even when the terminal does not transmit data, but the virtual dedicated channel allocation method may use any resource every moment. The efficiency of the resource can be greatly increased because it is determined by pre-assigned patterns.

Conventional scheduling schemes are advantageous for high capacity data transmission over the Internet, but are vulnerable to low / medium data rate traffic, such as real time traffic such as call connections.

In the conventional non-scheduling scheme, the dedicated channel allocation method has excellent performance with respect to real-time traffic such as VoIP, gaming, and video service, but has a problem in that resource efficiency is inferior because data is always occupied with or without data.

In the conventional non-scheduling scheme, the virtual dedicated channel allocation method is advantageous for real-time traffic and low / mid-speed traffic, but is unsuitable for high capacity traffic.

The present invention can maximize the efficiency of resources by processing the traffic request of each terminal according to the scheduling method or the virtual dedicated channel allocation method according to the location of the terminal and the type of request service.

In addition, the present invention controls the resources allocated to each of the data to be transmitted by the scheduling scheme and the virtual dedicated channel allocation method, thereby transmitting data serviced in different ways through one radio link.

An apparatus for processing traffic of a digital communication system according to the present invention includes an operation mode setting unit configured to set an operation mode for each terminal based on a location and a request service of terminals, and based on the operation mode set by the operation mode setting unit. A traffic processor for processing a traffic request of each terminal that allocates a resource for a traffic request of a specific terminal among the traffic requests of each terminal or allocates a resource hopping pattern to each terminal and then allocates a different resource for each symbol period. Include.

The traffic processing unit in the present invention, the traffic processing unit, the first mode unit for processing the traffic request of each terminal by allocating resources for the traffic request of a specific terminal of the traffic request of each terminal, and to each terminal A second mode unit configured to process a traffic request of each terminal by allocating a different resource for each symbol period after allocating a resource hopping pattern, and receiving the traffic requests of the terminals based on an operation mode set by the operation mode setting unit; A first multiplexer outputs the first or second mode unit and a second multiplexer outputs the data output from the first and second mode units through one wireless link.

The apparatus for processing traffic of a digital communication system according to the present invention includes a bandwidth management unit configured to set different resources in the first and second mode units to distinguish data of the first and second mode units outputted through the wireless link.

The bandwidth manager of the present invention is characterized by controlling the amount of resources to be allocated to the first and second mode units based on the amount of traffic for each operation mode set by the operation mode setting unit.

A traffic processing method of a digital communication system according to the present invention is a method of processing a traffic request by a digital communication system receiving a traffic request from a plurality of terminals, the method comprising the steps of: receiving a traffic request from an arbitrary terminal; Determining an operation mode of the terminal based on a location of the terminal and a request service, and allocating a resource for a traffic request of a specific terminal among the traffic requests of the terminal based on the traffic request of the terminal based on the determined operation mode The method may include a scheduling method or a virtual channel allocation method of allocating a resource hopping pattern to each terminal and then assigning a different resource for each symbol period.

The present invention can maximize the efficiency of resources by processing the traffic request of each terminal according to the scheduling method or the virtual dedicated channel allocation method according to the location of the terminal and the type of request service.

In addition, the present invention has the advantage of transmitting data that is serviced in different ways through one radio link by controlling the resources allocated to each to distinguish the data transmitted by the scheduling scheme and the virtual dedicated channel allocation method. .

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, in describing the present invention, when it is determined that the detailed description of the related known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

An embodiment of the present invention describes an apparatus and method for classifying traffic requests of terminals based on the location of the terminal and the type of requested service, and then processing the traffic request by the scheduling method and the virtual dedicated channel allocation method.

2 is a block diagram illustrating a traffic processing apparatus of a digital communication system according to an exemplary embodiment of the present invention.

Referring to FIG. 2, the traffic processing apparatus includes an operation mode setting unit 200, a first multiplexing unit 210, a first and second mode units 220 and 230, a second multiplexing unit 240, and a bandwidth managing unit ( 250). Here, the first multiplexer 210, the first and second mode units 220 and 230, and the second multiplexer 240 are configured based on the operation mode for each terminal set by the operation mode setting unit 200. After classifying the traffic request and processing it by a scheduling method or a virtual dedicated channel allocation method and outputting to the second multiplexer 240, it may be configured as one traffic processing unit.

The operation mode setting unit 200 generates an operation mode based on locations and request services of the plurality of user terminals as traffic requests are received from a plurality of communication stations, for example, user terminals, and generates the generated operation mode by the first multiplexer. Provided at 210. That is, the operation mode setting unit 200 is located in an area A (spot cell) where the location of the user terminal is a good signal as shown in FIG. 3 and the request service is data, for example, high capacity data service, congestion traffic ( In case of a bursty traffic) request, the user terminal is set to the first operation mode in order to process the traffic request of the user terminal by the scheduling method. Otherwise, the user terminal is located in the B region or the user terminal regardless of the requested service. Is located in area A and the request service is a medium / low traffic request or a real-time traffic request), the user terminal is set to the second operation mode to process the traffic request of the user terminal in a virtual dedicated channel allocation method. It is set and provided to the first multiplexer 210. Here, the congestion traffic is a request of the user terminal to receive a large amount of data service, the real-time traffic request is a request of the user terminal to receive a real-time service, such as voice, VoIP, video.

Here, the A region refers to an interference free region in the cell region, and the B region is an interference averaging region, for example, a handover region.

Meanwhile, the operation mode setting unit 200 generates the traffic amount information for each operation mode based on the generated first and second operation modes and provides the generated traffic amount information to the bandwidth manager 250. That is, the operation mode setting unit 200 checks the amount of traffic for each operation mode based on the number of user terminals and the requested service type corresponding to the first and second operation modes, and then generates information corresponding to the bandwidth management unit 250. To provide.

The first multiplexer 210 receives traffic requests from a plurality of user terminals and classifies the received traffic requests based on the operation mode received by the operation mode setting unit 200. ) That is, the first multiplexer 210 outputs the traffic request of the user terminal corresponding to the first operation mode to the first mode unit 220 and outputs the traffic request of the user terminal corresponding to the second operation mode in the second mode. Output to the unit 230.

The first mode unit 220 processes the traffic request of the user terminal output from the first multiplexer 210 by using a scheduling method to service data. That is, the first mode unit 220 transmits data by processing a traffic request of a user terminal classified into a first operation mode by a scheduling method, wherein the scheduling method is a method of allocating resources to a specific user terminal.

The second mode unit 230 processes the traffic request of the user terminal output from the first multiplexer 210 by using a virtual dedicated channel allocation method to service data. That is, the second mode unit 230 transmits data by processing the traffic request of the user terminal classified into the second operation mode by the virtual dedicated channel allocation method, where the virtual channel allocation method is used instead of a fixed resource to each user terminal. After the resource hopping pattern is allocated, different resources are allocated for each symbol period based on the resource hopping pattern.

Data output from the first and second mode units 220 and 230 is transmitted to the user terminal through one second wireless link through the second multiplexer 240.

As described above, in order for data output in different operation modes to be transmitted through one wireless link, data should be distinguished without being confused from the viewpoint of the user terminal. For this reason, the bandwidth management unit 250 uses the resources used for the first and second mode units 220 and 230, that is, any one or several combinations of frequencies, times, and codes, or the combination of the first and second mode units 220 and 230. ) To separate the data to be transmitted.

That is, as shown in FIG. 4A, the bandwidth manager 250 may set different codes for different data transmissions in the first and second mode units 220 and 230, or as shown in FIG. 4B. The time slots used for data transmission in the first and second mode parts 220 and 230 are set differently from each other, or as shown in FIG. 4C. By setting differently, the data output from the first and second mode units 220 and 230 are transmitted through one wireless link.

As described above, data is transmitted by differently setting codes, frequencies, or times used for data transmission in the first and second mode units 220 and 230, and thus can be transmitted through one wireless link and confused from the viewpoint of the user terminal. Data can be distinguished without

In addition, the bandwidth manager 250 sets the amount of resources to be allocated to the first and second mode units 220 and 230 based on the information on the amount of traffic for each mode provided from the operation mode setting unit 220. That is, when there is a large amount of traffic to be processed by the first mode unit 220, the bandwidth manager 250 allocates a larger amount of resources to the first mode unit 220 than the second mode unit 230. If not, a large amount of resources are allocated to the second mode unit 230 compared to the first mode unit 220.

The second multiplexer 240 transmits data output from the first and second mode units 220 and 230 to each user terminal through one wireless link.

A process of operating the resource allocation apparatus having the above configuration will be described with reference to FIG. 4.

5 is a flowchart illustrating a process of processing traffic according to a request of a terminal according to an exemplary embodiment of the present invention.

Referring to FIG. 5, first, a traffic processing apparatus receives a traffic request from an arbitrary user terminal in a cell area by using the first multiplexer 210 (S500). In this case, the operation mode setting unit 200 determines the physical location of the user terminal, that is, location information within the cell and the requested service (S502), and then determines an operation mode to be set for the user terminal.

That is, when the location of the user terminal is an area A as shown in FIG. 3 and the request service is a data, for example, a high capacity data service or a congestion traffic request, a first operation mode is set for the user terminal, and the location of the user terminal is set. Is a B area and the request service is a data service, or if the location of the user terminal is an A area or a B area, and the request service is a real-time connection or a medium / low speed traffic request such as voice, VoIP, video, or the like, the second terminal for the user terminal; Set the operation mode.

In this case, the operation mode setting unit 200 monitors the traffic amount of the first and second operating modes when classifying each user terminal according to the traffic request of the user terminal, and then monitors the monitored information (the traffic ratio of the first and second operating modes). Information) is provided to the bandwidth management unit 250, and the bandwidth management unit 250 determines the amount of resources to be allocated to the first and second operating modes according to the traffic ratio information of the first and second operating modes, and then, the first and second mode units. Provided to (220, 230) (S504). That is, when the amount of traffic of each user terminal set to the first operation mode is high, more resources are allocated to the first operation mode than to the second operation mode.

The first multiplexer 210 classifies the traffic request of the user terminal received from the outside based on the operation mode set in each user terminal and outputs the traffic request to the first mode unit 220 or the second mode unit 230. That is, the first multiplexer 210 outputs the traffic request of the user terminal set to the first operation mode to the first mode unit 220, and outputs the traffic request of the user terminal set to the second operation mode to the second mode unit ( 230).

When the user terminal is set to the first operation mode (S506), the first mode unit 220 processes the traffic request of the user terminal by using a scheduling method and outputs the data to the second multiplexer 240 accordingly. In operation S508, when the user terminal is set to the second operation mode, the traffic request of the user terminal is processed by the virtual dedicated channel allocation method using the second mode unit 230, and the data according to the second multiplexer 240 is performed. In step S510, it is output.

The first and second mode units 220 and 230 process the traffic request of the user terminal based on the resource allocation amount set by the bandwidth management unit 250 and according to the processing of the traffic request using different codes, time slots, or frequencies. The data is output to the second multiplexer 240.

As described above, according to the present invention, the traffic request of the user terminal is processed in two modes based on the request service type and the location of the user terminal, thereby increasing resource efficiency.

In addition, according to the present invention, by differentiating the data transmitted by the scheduling scheme and the virtual dedicated channel allocation method through the control of the resources allocated to each, it is possible to transmit data serviced in different ways through one radio link.

It has been described so far limited to one embodiment of the present invention, it is obvious that the technology of the present invention can be easily modified by those skilled in the art. Such modified embodiments should be included in the technical spirit described in the claims of the present invention.

1A is a diagram for explaining resource allocation using a conventional scheduling method.

1B is a diagram for explaining resource allocation using a conventional non-scheduling method.

2 is a block diagram illustrating an apparatus for processing traffic in a digital communication system according to an embodiment of the present invention.

3 is a view showing an area within a cell to which the present invention is applied.

4A is an exemplary diagram illustrating a state in which different codes are set according to a request service type and a terminal location according to the present invention.

4B is an exemplary diagram illustrating a state in which different frequencies are set according to a request service type and a location of a terminal according to the present invention.

4C is an exemplary view illustrating a state in which different times are set according to a request service type and a location of a terminal according to the present invention.

5 is a flowchart illustrating a process of processing a traffic request of a terminal according to an exemplary embodiment of the present invention.

Claims (13)

An operation mode setting unit configured to set an operation mode for each terminal based on a location and a request service of terminals; Allocating a resource for a traffic request of a specific terminal among the traffic requests of each terminal based on the operation mode set by the operation mode setting unit or assigning a resource hopping pattern to each terminal, and then assigns a different resource for each symbol period. Traffic processing unit for processing the traffic request of each terminal Traffic processing apparatus of the digital communication system comprising a. The method of claim 1, The traffic processing unit, A first mode unit for allocating a resource for a traffic request of a specific terminal among the traffic requests of each terminal to process the traffic request of each terminal; A second mode unit for allocating a resource hopping pattern to each terminal and then allocating different resources for each symbol period to process traffic requests of the respective terminals; A first multiplexing unit outputting traffic requests of the terminals to the first or second mode unit based on the operation mode set by the operating mode setting unit; A second multiplexer for outputting data output from the first and second mode units through one wireless link; Traffic processing apparatus of the digital communication system comprising a. The method of claim 2, Bandwidth management unit for setting different resources in the first and second mode unit to distinguish the data of the first and second mode unit output to the wireless link Traffic processing apparatus of the digital communication system comprising a. The method of claim 3, wherein The bandwidth management unit may control the amount of resources to be allocated to the first and second mode units based on the amount of traffic for each operation mode set by the operation mode setting unit. . The method of claim 1, The operation mode setting unit, When the physical location of the terminal is within a predetermined range of the cell area and the request service of the terminal is a data service, processing the traffic request of the terminal by allocating a resource for the traffic request of a specific terminal of the traffic request of each terminal Traffic processing apparatus of the digital communication system, characterized in that for setting the operation mode for. The method of claim 1, The operation mode setting unit, When the location of the terminal is out of a predetermined range of the cell area and the requested service is data, an operation mode for processing traffic of the terminal by allocating a resource hopping pattern to each terminal and then assigning a different resource for each symbol period based on the resource hopping pattern. Traffic processing apparatus of the digital communication system, characterized in that for setting. The method of claim 1, The operation mode setting unit, Regardless of the location of the terminal, the request service allocates a resource hopping pattern to each terminal, which is a real-time service or a medium / low speed traffic request, and then allocates a different resource for each symbol period based on this to process traffic of the terminal. A traffic processing apparatus for a digital communication system, characterized in that the operation mode is set. A digital communication system for receiving a traffic request from a plurality of terminals to process the traffic request, Receiving a traffic request from any terminal; Determining an operation mode of the terminal based on a location and a request service of the arbitrary terminal; A scheduling method for allocating a resource request for a traffic request of a specific terminal among the traffic requests of each terminal based on the determined operation mode, or assigning a resource hopping pattern to each terminal and then changing the symbol request according to the symbol period. Process with virtual channel allocation method to allocate resources Traffic processing method of the digital communication system comprising a. The method of claim 8, The traffic processing method, And when the physical location of the terminal is within a predetermined range within a cell area and the request service of the terminal is a data service, the traffic request of the terminal is processed by the scheduling method. The method of claim 8, The traffic processing method, And when the location of the terminal is out of a predetermined range within a cell area and the request service is data, the traffic of the terminal is processed by the virtual dedicated channel allocation method. The method of claim 8, The traffic processing method, Regardless of the location of the terminal, if the request service is a real-time service or a medium / low speed traffic request, the traffic of the terminal is processed by the virtual dedicated channel allocation method. The method of claim 8, The traffic processing method, Checking the amount of traffic for each operation mode; Setting resources to be used in the scheduling method and the virtual dedicated channel allocation method based on the traffic amount for each operation mode Traffic processing method of the digital communication system further comprising. The method of claim 8, The traffic processing method, The frequency, code, or time used for the scheduling method and the virtual dedicated channel allocation method are set differently to transmit data processed by the scheduling method and the virtual dedicated channel allocation method to one radio link. How to handle traffic in digital communication systems.

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