KR100704671B1 - System and method for traffic processing of hpi system - Google Patents

Abstract

The present invention relates to a traffic processing system and a method of a high-speed portable Internet system that can efficiently perform scheduling and traffic processing.

A traffic processing system and method thereof for a high-speed portable Internet system include a scheduling unit and an uplink frame processing unit that must operate correctly according to frame synchronization in order for a MAC software module of an AP to be configured as a task having a different priority according to each logical function. And a high priority in the control unit and a low priority so as not to burden the operation of the processor with the downlink packet processing unit and the uplink packet processing unit processing downlink packets received from the network and uplink packets received from a plurality of terminals. In addition, the traffic processing system and method thereof of the high-speed portable Internet system control the operation according to an external clock interrupt in the scheduling unit, the uplink frame processing unit, and the control unit requiring precise operation time points, and each unit is driven by a thread to provide cell and user information. By sharing, the communication load between each process can be reduced so that high-speed packets can be processed efficiently while real-time traffic processing is performed.

High Speed Mobile Internet System (HPI), MAC Software Modules, Tasks, Threads, Clock Interrupts

Description

Traffic processing system and method thereof of high-speed mobile Internet system {{SYSTEM AND METHOD FOR TRAFFIC PROCESSING OF HPI SYSTEM}

1 illustrates a general network configuration of a high speed portable Internet (HPi) system.

2 shows a logical structure of a MAC software module of a base station of a high-speed portable Internet system.

3 illustrates a configuration of a MAC software module for downlink traffic processing in a traffic processing system of a high speed portable Internet system according to an embodiment of the present invention.

4 illustrates a configuration of a MAC software module for uplink traffic processing in a traffic processing system of a high speed portable Internet system according to an embodiment of the present invention.

5 is a flowchart illustrating a task operation of a traffic processing method of a high speed portable Internet system according to an embodiment of the present invention.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a traffic processing system and a method thereof for a high speed portable internet system, and more particularly, to a traffic processing system and a method of a high speed portable internet system for performing task operation control in a MAC software module in a base station (AP) for efficient traffic control. It is about.

High-speed Portable Internet (HPi) system is a 3.5 generation mobile communication system that provides IP-based wireless data service using wireless transmission technology that guarantees spectrum usage efficiency in 2.3 GHz frequency band.

1 illustrates a general network configuration of a high speed portable Internet (HPi) system.

As shown in FIG. 1, a high-speed portable Internet (HPi) system includes an access terminal (AT) and a base station (AP) that supports wireless connection and network connection of the AT.

The base station (AP) includes a traffic processor 11 for processing user data, a controller 12 for processing control messages, and a hardware transceiver 13 for performing a radio section data transmission / reception function.

The traffic processor 11 performs traffic processing and packet scheduling as main functions, and is implemented as a MAC software module that performs radio link control, retransmission control, radio resource management, packet matching between wired sections and radio sections.

Since the physical layer is operated in a frame structure of 5 msec, the high speed portable Internet (HPi) system requires the generation and transmission of frame data after scheduling the traffic processor 11 in synchronization with every frame in the high speed portable Internet system. .

Therefore, depending on the hardware clock signal, the MAC software module and the hardware module must operate at every frame synchronization. However, the traffic received from the upper layer (IP network) has a traffic characteristic that can be generated in large quantities or small quantities periodically and not periodically.

For this reason, the MAC software module needs to process random traffic quickly and generate and transmit frame data by scheduling every fixed period (frame).

As such, the period and amount of traffic coming from the upper layer are variable, and the frame data must be transmitted at regular intervals in the radio section by scheduling data received through a plurality of traffic connections, thereby requiring an efficient operation system of the MAC software module.

The technical problem to be achieved by the present invention is to implement a MAC software module that processes up / down traffic in a high-speed portable Internet (HPi) system to process high-speed up / down packets quickly, perform efficient scheduling to the transceiver within a predetermined time The present invention provides a traffic processing system and a method of a high-speed portable Internet system capable of accurately delivering frame data and reading uplink frame data.

In order to solve this problem, the present invention configures the MAC software module of the base station as a task having a different priority according to each logical function.

A traffic processing system of a high speed portable internet system according to a first aspect of the present invention is a traffic processing system of a high speed portable internet (HPi) system for processing frame data received from a network, by extracting an IP packet from the received frame. A downlink packet processor configured to determine a wireless connection ID associated with the IP packet and store the same in a service data unit buffer; A scheduling unit configured to perform scheduling every frame in consideration of the service data unit buffer state, a radio connection parameter, and a radio link state, and to transmit the scheduled information within a predetermined time; And a control unit which manages cell / terminal / traffic setting / change / release information used by the downlink packet processing unit and scheduling unit and performs various control operations.

A traffic processing system of a high speed portable internet system according to a second aspect of the present invention is a traffic processing system of a high speed portable internet (HPi) system for processing frame data received from a terminal, wherein the frame data is read every frame. An uplink frame processor for classifying each packet data unit; An uplink packet processor configured to recombine and separate the packet data unit transmitted from the uplink frame processor as a service data unit for transmission to a higher network, and transmit the generated packet data unit to a network; And a controller configured to manage cell / terminal and traffic setting / change / release information used by the uplink frame processor and the uplink packet processor and to perform various control operations.

The terminal may further include a scheduling unit configured to perform uplink scheduling so that the terminal may access the uplink frame.

A traffic processing system of a high speed portable Internet system according to a third aspect of the present invention is a traffic processing system of a high speed portable Internet (HPi) system for processing downlink packets received from a network and uplink packets received from a plurality of terminals. An uplink frame processor for reading the uplink packet every frame and classifying the uplink packet into respective packet data units; An uplink packet processor configured to recombine and separate the packet data unit transmitted from the uplink frame processor as a service data unit for transmission to a higher network, and transmit the generated packet data unit to a network; A downlink packet processor which extracts an IP packet from the downlink packet, determines a radio connection ID associated with the IP packet, and stores the IP packet in a service data unit buffer; The scheduling is performed every frame in consideration of the service data unit buffer state, the radio connection parameter, and the radio link state, the scheduled information is transmitted within a predetermined time, and the uplink scheduling is performed so that the terminal can access. / Downlink scheduling; And a controller for managing setting / modification / release information of cells, terminals, and traffic used in the uplink frame processor, the uplink packet processor, the downlink packet processor, and the up / down scheduling unit, and performing overall control operations.

The uplink frame processor, the up / down scheduler, and the controller are preferably controlled by the main processor according to an external clock interrupt.

The main processor preferably divides one frame into a plurality of time slices, and assigns a task to each uplink frame processor, up / down scheduler, and controller in a predetermined time interval.

The uplink / downlink scheduling unit and the uplink frame processing unit may be set to have a higher priority than the uplink packet processing unit and the downlink packet processing unit.

The downlink packet processor, the uplink frame processor, the uplink packet processor, the scheduler, and the controller are preferably implemented as threads to share user information and cell information required for traffic processing.

In the traffic processing method of the high-speed portable Internet system according to the fourth aspect of the present invention, in the traffic processing method of the high-speed portable Internet (HPi) system for processing the downlink packets received from the network and the uplink packets received from a plurality of terminals, a) operating a downlink packet processing task, a downlink scheduling task, and a control task to process the downlink packet to generate the downlink packet as frame data for transmission, and to transmit a frame information message accordingly; b) an uplink frame processing task, an uplink packet processing task, an uplink scheduling task, and a control task for operating the uplink packet are classified into respective packet data units, and then generating a service data unit and delivering the service data unit to a higher network; And c) performing control of setting, changing, and releasing a cell, a terminal, and traffic while controlling the overall operations of steps a) and b) to provide control information necessary for steps a) and b). It includes.

In steps a) to c), the uplink and downlink scheduling tasks, the uplink frame processing task, and the control task stay in a semaphore wait state and wait for a clock interrupt when one frame operation is completed, and the uplink and downlink packet processing tasks It is preferable not to be subjected to the operation control of the main process.

In the steps a) and b), in the case of the uplink and downlink scheduling task, the uplink frame processing task, and the control task, the task is divided into a plurality of time slices and assigned to each task in a predetermined time interval. It is desirable to control the operation.

The control task may be set to have a higher priority than the downlink scheduling task and the uplink frame processing task, and the downlink scheduling task and the uplink frame processing task may be set to have a higher priority than the uplink and downlink packet processing task.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention. Like parts are designated by like reference numerals throughout the specification.

In the high-speed portable Internet system to which the present invention is applied, the structure of the MAC software module of the base station is as follows.

2 shows a logical structure of a MAC software module of a base station of a high-speed portable Internet system.

As shown in FIG. 2, the MAC software module of the base station includes a downlink traffic processor 51, an uplink traffic processor 52, and a radio link controller 53.

The downlink traffic processing unit 51 receives a packet from a network, searches for a corresponding wireless segment connection, classifies it into a related queue, and schedules the packets received during one frame by the scheduler according to a corresponding QoS parameter and then frame data. Configure and transmit.

The uplink traffic processing unit 52 receives frame data from a hardware receiver every frame, classifies a control message, delivers the control message to a related block, and stores the data in a queue for each packet data unit (PDU) in case of traffic, and a buffer. Processes a PDU stored in the SDU (Service Data Unit) packet to be delivered to the upper network to be delivered to the network.

The radio link control unit 53 performs a function of changing a radio parameter in accordance with radio link measurement information received from a hardware transceiver and notifying the radio parameter to a corresponding terminal, and supporting a terminal initial access.

As such, the logical functional classification of the MAC software module of the base station includes five operations such as a downlink packet processing task (TASK), an uplink packet processing task, an up / down scheduling task, an uplink frame processing task, and a control task in the MAC software implementation. Can be reclassified as a task.

3 illustrates a configuration of a MAC software module for downlink traffic processing in a traffic processing system of a high-speed portable Internet system according to an embodiment of the present invention, and FIG. 4 illustrates a configuration of a MAC software module for uplink traffic processing. It is.

As shown in Figure 3 and 4, the traffic processing system of the ultra-high speed portable Internet system according to an embodiment of the present invention, the downlink packet processing unit 110, up / down scheduling unit 120, uplink frame processing unit 140 The uplink packet processor 150 and the controller 160 are included.

The downlink packet processing unit 110 extracts an IP packet from an Ethernet frame received from a network, determines an associated wireless connection ID, performs IP header compression, and stores the IP packet in the wireless connection SDU buffer 115. The downlink packet processor 110 operates for every packet reception and has a short processing time to perform fast packet processing.

The up / down scheduling unit 120 generates frame data to be transmitted in one frame in consideration of the SDU buffer 115 state, the radio connection parameter, and the radio link state for each radio connection, and packs a frame information message accordingly to the hardware transmitter. To do this.

In addition, the up / down scheduling unit 120 performs uplink scheduling so that the terminal can access the uplink frame.

The up / down scheduling unit 120 needs to perform scheduling every frame. Since the scheduled information must be transmitted to hardware within a predetermined time interval, accurate processing time and periodic operation are required for each frame.

The uplink frame processor 140 reads frame data received from the radio section from the hardware receiver, classifies each PDU, and transfers the PDUs to the corresponding task. Since the uplink frame processor 140 needs to read frame data from hardware in a predetermined time interval, an accurate processing start time and periodic operations are required for each frame.

The uplink packet processor 150 generates an SDU (ie, an IP packet) to be delivered to a higher network by performing reassembly and demultiplexing as a task for processing a MAC PDU received from a radio section. Send via Ethernet. The uplink packet processor 150 operates for a short time for high speed packet processing.

The controller 160 is a task for controlling the overall operation of the MAC software module and performs a cell setup / change / release function, a terminal AT registration and setup / release function, and a traffic connection setup / change / release function.

That is, the controller 160 manages cell, AT, and traffic information used in all tasks in the MAC software module, and controls the overall operation in the MAC software module, so that a higher priority is required than other tasks.

Each part described above is a task classified according to the logical function of the MAC software module, and each task receives the cell, AT, and traffic information necessary for performing its operation from the controller 160.

However, delays may occur due to inter-process communication in order for each task that needs to process high-speed traffic to receive control information from another task. In the embodiment of the present invention, all tasks in the MAC software module are implemented as threads to control the tasks. Information can be saved / managed as global variables and shared.

On the other hand, the MAC software module is provided with an external clock interrupt (1msec) in order to synchronize the frame in processing the traffic according to the requirements of the ultra-high-speed portable Internet (HPi) system.

The main processor in the MAC software module is a process that starts the driving of each task and controls the operation of each task according to an external clock interrupt.

The main processor uses a semaphore to control the operation of each task. In particular, the downlink scheduling unit 120 and the uplink frame processing unit 140 do not operate except a predetermined time slot for transmitting and receiving frame data. Enabled by the clock interrupt indicated.

The main processor controls the up / down scheduling unit 120, the uplink frame processing unit 140, and the control unit 160 to operate according to the clock interrupt.

In this case, the main processor allows the up / down scheduling unit 120, the uplink frame processing unit 140, and the control unit 160 to stay in the semaphore waiting state and wait for a clock interrupt when one frame operation is completed.

Irrespective of the frame period, the uplink packet processor 150 and the downlink packet processor 110, which require packet processing every time a packet is generated, operate without being controlled by the main process.

Next, the operation of the traffic processing system of the high-speed portable Internet system according to the embodiment of the present invention will be described in detail with reference to FIG. 5.

5 is a flowchart illustrating a task operation of a traffic processing method of a high speed portable Internet system according to an embodiment of the present invention.

As shown in FIG. 5, in the traffic processing method of the ultra-high speed portable Internet system according to an embodiment of the present invention, the downlink traffic processing process includes receiving semaphores from the up / down scheduling unit 120 when the first hardware clock of a frame is received. In the meantime, packets are accumulated in the buffer for each wireless connection, and one frame data is composed and transmitted to the hardware transmitter.

The transmitter processes the received frame data in hardware (takes 3 msec) and broadcasts it in a wireless section. The scheduling and frame data transfer time is limited to 2msec so that the broadcast is started in the radio section at the start of the next frame.

Next, in the uplink traffic processing process, the time required for processing the frame data received from the wireless section in the previous frame section to be transmitted to the uplink frame processing unit 140 in the MAC software module is 3 msec.

When the fourth clock of the frame is received, the uplink frame processor 140 starts the operation, reads the frame data after hardware processing, analyzes the data, and delivers the data to the corresponding task. Since the uplink frame data includes data requiring urgent processing such as a bandwidth request PDU and a radio link ranging message, the uplink frame processor 140 operates within 1 msec to inform the related task.

In the case of the band request PDU, the uplink / downlink scheduling unit 120 of the next frame must be delivered before the terminal can respond to the next frame immediately. The control unit is driven when the third and fifth clocks of every frame are received for quick processing of the basic management MAC message, which requires urgent processing among the MAC control messages.

When the uplink frame processor 140, the up / down scheduler 120, and the controller 160 are in a standby state (not in operation), the uplink packet processor 150 and the downlink packet processor 110 operate from time to time. Distribute the load of uplink scheduling and uplink processing.

On the other hand, the traffic processing method of the ultra-high speed portable Internet system according to the embodiment of the present invention as described above is implemented as a program in a computer-readable form of a recording medium (CD-ROM, RAM, ROM, floppy disk, hard disk, magneto-optical disk) And the like).

Although the preferred embodiment of the present invention has been described in detail above, the present invention is not limited thereto, and various other changes and modifications are possible.

As described above, the traffic processing system and method of the high-speed portable Internet system of the present invention provide a redundant operation priority system by separating a task requiring processing that meets accurate frame synchronization and a task requiring rapid packet processing, By controlling the operation with a clock interrupt, it is possible to process a high-speed packet quickly, and efficiently handle a large number of traffic connections at a predetermined time to provide accurate frame data transmission and reception.

Claims (16)

delete delete delete In the traffic processing system of a high speed portable Internet (HPi) system for processing downlink packets received from the network and uplink packets received from a plurality of terminals, An uplink frame processor for reading the uplink packet every frame and classifying the uplink packet into respective packet data units; An uplink packet processor configured to recombine and separate the packet data unit transmitted from the uplink frame processor as a service data unit for transmission to a higher network, and transmit the generated packet data unit to a network; A downlink packet processor which extracts an IP packet from the downlink packet, determines a wireless connection ID associated with the IP packet, and stores the IP packet in a service data unit buffer; The scheduling is performed every frame in consideration of the service data unit buffer state, the radio connection parameter, and the radio link state, the scheduled information is transmitted within a predetermined time, and the uplink scheduling is performed so that the terminal can access. / Downlink scheduling; And Control unit for managing the setting / change / release information of the cell, the terminal, the traffic used in the uplink frame processing unit, uplink packet processing unit, downlink packet processing unit, and up / down scheduling unit and performs various control operations Including; The uplink / downlink scheduling unit and the uplink frame processing unit are set to have a higher priority than the uplink packet processing unit and the downlink packet processing unit, and the controller is configured to have a higher priority than the uplink / downlink scheduling unit and the uplink frame processing unit. Traffic processing system of high speed mobile Internet system. The method of claim 4, wherein The uplink frame processor, the up / down scheduling unit, and the control unit is a traffic processing system of the high-speed portable Internet system is controlled by the main processor according to the external clock interrupt. The method of claim 5, The main processor divides one frame into a plurality of time slices and assigns a task to each uplink processor, up / down scheduler, and controller in a predetermined time interval to process the traffic. delete The method according to claim 4 or 5, The up / down scheduling unit and the uplink frame processor use semaphores so as not to operate other than a predetermined time slot for transmission and reception of data for each frame of the uplink packet, and process traffic according to an external clock interrupt. system. The method according to any one of claims 4 to 6, The downlink packet processing unit, uplink frame processing unit, uplink packet processing unit, up / down scheduling unit, the control unit is a traffic processing system of the high-speed portable Internet system is implemented as a thread to share user information and cell information required for traffic processing. A traffic processing method of a high speed portable Internet (HPi) system for processing downlink packets received from a network and uplink packets received from a plurality of terminals, the method comprising: a) operating a downlink packet processing task, a downlink scheduling task, and a control task to process the downlink packet to generate the downlink packet as frame data for transmission, and to transmit a frame information message accordingly; b) an uplink frame processing task, an uplink packet processing task, an uplink scheduling task, and a control task for operating the uplink packet are classified into respective packet data units, and then generating a service data unit and delivering the service data unit to a higher network; And c) providing control information necessary for steps a) and b) by performing a function of setting / changing / releasing cells, terminals, and traffic while controlling the overall operations of steps a) and b). Including, The control task is set to have a higher priority than the downlink scheduling task and the uplink frame processing task, and the downlink scheduling task and the uplink frame processing task are set to have a higher priority than the uplink and downlink packet processing task. How to handle traffic. The method of claim 10, Steps a) to c) are traffic processing methods of the high-speed portable Internet system in which the main process that starts the driving of each task controls each operation by an external clock interrupt. The method of claim 11, The main process is a traffic processing method of a high-speed portable Internet system using a semaphore to control the operation of each task. The method of claim 12, Step a) to c), The uplink and downlink scheduling task, the uplink frame processing task, and the control task stay in a semaphore wait state and wait for a clock interrupt when one frame operation is completed, and the uplink and downlink packet processing task prevents operation control of the main process from being performed. How to handle traffic in high speed mobile Internet system. The method of claim 10, Step a) and b), In the case of the uplink and downlink scheduling tasks, the uplink frame processing task, and the control task, the traffic of the ultra-high speed portable Internet system controlling the operation of the task is divided into a plurality of time slices and assigned to each task in a predetermined time interval. Treatment method. delete The method according to any one of claims 10 to 14, Each of the tasks is implemented in a thread for sharing user information and cell information required for traffic processing.

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