KR100625249B1 - Apparatus and method for controlling packet transmit-period in high-speed portable internet network - Google Patents

Abstract

The present invention relates to an apparatus and a method for controlling a packet transmission period in a high speed portable Internet network providing a multimedia streaming service to a terminal.

In the present invention, first, the multimedia stream packet is transmitted to the terminal according to the first transmission period. After receiving the RR packet, which is a response packet, from the terminal to check the reception status for each packet, a jitter value is generated by extracting a jitter value in the RR packet, and then, based on the generated jitter list, 1 Predict the time of handoff occurrence. After predicting a second handoff occurrence time to be generated based on the predicted first handoff occurrence time, the second handoff occurrence time and the amount of packets not to be transmitted to the terminal during the second handoff progress time are estimated. Calculate the second transmission period. The second transmission period is a speed of transmitting a packet at a speed faster than the first transmission period, and transmits all packets not to be transmitted to the terminal to the terminal until the start of the second handoff together with packets to be transmitted before the second handoff proceeds. In this way, the playback of the streaming is not interrupted even during the second handoff progress time in the terminal.

High speed mobile Internet (HPi), handoff, transmission cycle, multimedia stream services

Description

Packet transmission cycle control device and method thereof in high speed mobile internet network {APPARATUS AND METHOD FOR CONTROLLING PACKET TRANSMIT-PERIOD IN HIGH-SPEED PORTABLE INTERNET NETWORK}

1 is a diagram illustrating a schematic configuration of an apparatus for adjusting a packet transmission period according to an embodiment of the present invention.

2 is a diagram illustrating a detailed configuration of an apparatus for adjusting a packet transmission period according to an embodiment of the present invention.

3 is a flowchart sequentially illustrating an operation process of an apparatus for adjusting a packet transmission period according to an exemplary embodiment of the present invention.

4 is a diagram conceptually illustrating a mutual relationship between a first and second handoff occurrence time according to an exemplary embodiment of the present invention.

The present invention relates to a high-speed portable Internet (hereinafter referred to as HPi) network, and more particularly, to an apparatus and method for adjusting a period of a packet transmitted from a HPi network to a terminal.

HPi is one of the next generation wireless services to provide an ideal environment for wired and wireless integration, and is currently the hottest service.

Specifically, the HPi system may be said to be a system providing intermediate services between the wireless LAN system and the cellular mobile communication system. The wireless LAN system provides a high transmission speed but does not support service coverage and mobility. There is this. In addition, the cellular mobile communication system supports wide service coverage and mobility, but has a disadvantage of low transmission speed.

However, the HPi system is a system that combines only the advantages of the characteristics of the wireless LAN system and the cellular mobile communication system, and aims to support service coverage and mobility at a level close to the cellular mobile communication system while providing a high transmission speed. Doing.

Looking at such an HPi system, it is based on a cell-based mobile communication structure and supports a mobile system-specific technology called hand-off or handover.

That is, each time the terminal moves, the associated cell and the PAR (Packet Access Router) managing the cells are changed. The terminal performs a handoff every time to guarantee the durability of the service.

However, when the handoff is performed, the traffic currently being transmitted to the terminal is interrupted for a while, which causes a delay in receiving the traffic, which causes a deterioration in service quality.

As a result, the multimedia streaming service based on RTP (Real Time Protocol) or RTCP (Real Time Transport Control Protocol) is most widely used in the Internet environment in HPi networks. In the case of providing a video on demand (eg, video on demand) to the terminal, service disconnection occurs every time the terminal is handed off. For reference, the multimedia stream packet is transmitted to the terminal based on the RTP, and the RTCP is used to control the transmission period of the packet.

Therefore, an apparatus and a method capable of providing a multimedia streaming service to a terminal without data loss in consideration of a handoff for each terminal are in need of reality.

The technical problem to be solved by the present invention is to solve the above problems, by adjusting the period of the streaming packet to be transmitted to the terminal in anticipation of the handoff occurrence time of the terminal, thereby improving the quality degradation of the multimedia streaming service due to frequent handoff An apparatus and method for controlling a packet transmission period in a high speed portable Internet network can be provided.

An apparatus for adjusting a packet transmission period in a high speed portable internet network according to a feature of the present invention for achieving the above object is a device for adjusting a transmission period of a packet in a high speed portable internet network transmitting a multimedia stream packet to a terminal. A packet transmission / reception unit configured to receive a response packet regarding a reception state of a packet transmitted from the terminal according to a first transmission period; A state diagnosis unit configured to analyze the received response packet and calculate an occurrence time of a first handoff of a terminal most recently generated based on a current time; A second handoff occurrence time predicting unit configured to calculate a second handoff occurrence time of the terminal to be generated at the closest time based on the current time based on the calculated time of the first handoff occurrence; A transmission period adjusting unit configured to calculate a second transmission period of the packet based on the amount of packets not to be transmitted to the terminal during the second handoff progress time which is a predetermined time from the calculated second handoff occurrence time; And a multimedia streaming service provider configured to transmit a multimedia stream packet to the terminal according to the calculated second transmission period.

The multimedia streaming service provider may include a packet not to be transmitted to the terminal during the second handoff progress time along with a packet to be transmitted until the second handoff proceeds according to the calculated second transmission period. All of the transmission to the terminal until the second handoff start.

In addition, the method for adjusting the streaming transmission period in the high-speed portable Internet network according to an aspect of the present invention, in the high-speed portable Internet network for transmitting a multimedia stream packet to a terminal, in the method for adjusting the transmission period of the packet, a) the Receiving a response packet including at least one of a loss rate indicating a reception state of a packet transmitted from the terminal to the terminal according to a first transmission period, and a jitter value representing a transmission numerical value by a predetermined value; b) analyzing the received response packet to predict an occurrence time of a first handoff of a terminal most recently occurring based on a current time; c) predicting an occurrence time of a second handoff of the terminal to occur at the closest point of time based on the current time point based on the estimated time of occurrence of the first handoff; d) calculating a second transmission period of the packet based on the amount of packets not to be transmitted to the terminal during a second handoff progress time which is a predetermined time from the predicted second handoff occurrence time; And e) all the packets not to be transmitted to the terminal during the second handoff progress time along with the packets to be transmitted before the second handoff progress, according to the calculated second transmission period, to the terminal until the start of the second handoff. Transmitting.

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 following embodiment of the present invention, for convenience of description, a handoff that has occurred at the closest time point based on the current time point among handoffs of the terminal that has already occurred is called a first handoff, and the current time during handoff of the terminal to be generated later. The handoff that will occur at the closest time point based on the time point is called a second handoff.

In addition, in the embodiment of the present invention, the transmission period of the packet calculated first without considering the transmission delay of the packet due to the handoff occurrence of the terminal is called the first transmission period, and again in view of the transmission delay of the packet. The transmission period of the packet calculated second is called a second transmission period.

1 is a diagram illustrating a schematic configuration of an apparatus for adjusting a packet transmission period according to an embodiment of the present invention.

As shown in FIG. 1, the apparatus 100 for controlling a packet transmission period according to an exemplary embodiment of the present invention is located in the streaming server 200 and the terminal 500 via a packet access router 300 and a base station 400. ) Provides a multimedia streaming service (eg, video on demand).

In addition, in the embodiment of the present invention, the packet transmission period adjusting device 100 is described as being located in the streaming server 200. However, this is not limited to the present invention. It may be a transmission period adjusting device 100, or may be formed separately from the streaming server 200.

The packet transmission period adjusting apparatus 100 transmits a multimedia stream packet to the terminal 500 based on a Real Time Protocol (RTP), which is most widely used in the Internet environment. However, when the terminal 500 performs hand-off by moving its position when transmitting such a packet, the multimedia stream packet being transmitted to the terminal 500 is temporarily stopped.

This, in turn, may cause a delay in receiving a traffic and may cause a deterioration in the service quality. The apparatus 100 for controlling a packet transmission period according to an embodiment of the present invention may reduce the transmission period of the multimedia stream packet in order to prevent the degradation of the service quality. Adjust

First, the packet transmission period adjusting apparatus 100 transmits a multimedia stream packet to the terminal 500 according to a first transmission period (a transmission period calculated first without considering packet transmission delay due to a handoff occurrence). do.

Then, the terminal 500 reports a packet reception state (for example, packet loss and packet transmission delay, etc.) based on the RTCP (Real time Transport Control Protocol, hereinafter 'RTCP'). RR ') packet is transmitted to the packet transmission period adjusting apparatus 100.

Then, the packet transmission period adjusting apparatus 100 collects and analyzes the information of the received RR packet to determine the first handoff (the handoff that occurred at the closest time point based on the current time point among the handoffs of the terminal which has already occurred). Predict the time of occurrence.

Based on the predicted first handoff occurrence time, the occurrence time of the second handoff to be generated later (the handoff to occur at the closest time based on the current time point among handoffs of the terminal to be generated later) is predicted.

Thereafter, the packet transmission period adjusting apparatus 100 calculates the amount of packets not to be transmitted during the second handoff progress time of the terminal 500, which is a predetermined time from the occurrence time, based on the predicted second handoff occurrence time. do. The second transmission period is calculated based on the calculated packet amount and the second handoff progress time. In other words, the transmission speed of the multimedia stream packet is recalculated.

Subsequently, the multimedia stream packet is transmitted to the terminal 500 based on the calculated second transmission period, wherein the packet transmission period adjusting device 100 may transmit a packet not to be transmitted during the second handoff progress time of the terminal 500. Send all before starting the second handoff. That is, the multimedia stream packet is transmitted to the terminal 500 at a higher speed than the normal transmission speed.

Then, the terminal 500 temporarily stores the received packet in a buffer (Buffer, not shown) at a speed higher than the data reproduction speed and buffers it, thereby synchronizing with the reproduction speed. In this way, the playback of the streaming is not interrupted even during the second handoff progress time.

As such, the apparatus 100 for controlling a packet transmission period according to an embodiment of the present invention predicts a first handoff time that has already occurred, and then predicts a second handoff time that will occur later based on the predicted time. The transmission period of the multimedia stream packet not received by the terminal 500 during the second handoff progress time is readjusted based on the predicted second handoff time. That is, the transmission period of the packet is recalculated.

Thereafter, the packet is transmitted to the terminal 500 according to the second transmission period, which is faster than the first transmission period, and thus, frequent by terminal in the High-Speed Portable Internet (HPi) network. The degradation of the quality of the multimedia streaming service due to the handoff can be improved.

Next, the packet transmission period adjusting device 100 constituting the above configuration will be described in detail.

2 is a diagram illustrating a detailed configuration of an apparatus for adjusting a packet transmission period according to an embodiment of the present invention.

As shown in FIG. 2, the packet transmission period adjusting device 100 according to an embodiment of the present invention includes a packet transceiver 110, a state diagnosis unit 120, a second handoff occurrence time estimation unit 130, Transmission period adjusting unit 140 and the multimedia streaming service provider 150 is included.

The packet transceiver 110 transmits a multimedia stream packet to the terminal 500 based on the RTP, or receives an RR packet from the terminal 500 based on the RTCP. At this time, the packet transceiver 110 transmits the multimedia stream packet to the terminal 500 according to the first transmission period calculated in advance.

For reference, the RR packet, which is a response packet received from the terminal 500, is a kind of feedback information sent by the terminal 500. The packet loss has occurred since the session was started, and the packet has occurred since the previous RR packet was sent. Loss rate and jitter values. In this case, the jitter value is a value representing a loss rate and a transmission delay of the packet transmitted to the terminal 500 using predetermined values.

The state diagnosis unit 120 analyzes the RR packet received from the terminal 500 to diagnose the reception state of the multimedia stream packet for each terminal. That is, after analyzing a reception state such as a loss of a multimedia stream packet or a packet transmission delay, the first handoff occurrence time of the terminal 500 is predicted based on the analysis result. To this end, the state diagnosis unit 120 includes a jitter list generator 121 and a first handoff occurrence time predictor 122.

The jitter list generator 121 of the state diagnosis unit 120 extracts the jitter value in the RR packet received from the terminal 500, and then sequentially arranges the extracted jitter values to generate a jitter list.

For example, the jitter list generator 121 analyzes the K-th RR packet received from the terminal 500 and finds the jitter value of the k-th multimedia stream packet transmitted to the terminal 500. And, by analyzing the K + 1 st RR packet received from the terminal 500 to find the jitter value of the k + 1 st multimedia stream packet transmitted to the terminal 500.

Thereafter, the jitter list generator 121 generates a jitter list based on the found jitter value. In this case, the jitter value for each packet is expressed by a predefined value as described above. For example, it is expressed as 0 in a normal reception state, 1 in an abnormal reception state, etc. Accordingly, the jitter list also includes a predetermined number of numbers. As described above, although the embodiment of the present invention expresses the jitter value numerically according to the RTP / RTCP control mechanism defined by the Internet Engineering Task Force (IETF), this is not limited to the present invention and may be represented by other data in some cases. .

The first handoff occurrence time prediction unit 122 determines a difference value for each jitter value of the generated jitter list, for example, the jitter value (figure 5) of the previously transmitted packet among the jitter values for each packet expressed as a predetermined value, and thereafter. The difference value 2 between the jitter values 3 of the packets transmitted to the terminal 500 is calculated. In addition, it is determined whether there is a first handoff occurrence by checking whether there is a difference value satisfying two predefined conditions among the calculated difference values.

In this case, the predefined condition includes a first condition in which the difference value of the jitter value is greater than the predetermined reference value, and a second condition in which the difference value of the other jitter values is smaller than the reference value. For example, the first handoff occurrence time prediction unit 122 has a difference value between the jitter value of the k th packet and the jitter value of the k + 1 th packet greater than the reference value, and the difference value for each jitter value between other packets is greater than the reference value. If a small constant value is maintained, it is determined that the first handoff has occurred.

Thereafter, the first handoff occurrence time predictor 122 analyzes an LSR (last SR) field and a delay since last SR (DLSR) field of the RR packet received from the terminal 500 to predict the first handoff occurrence time. do. For reference, the LSR field includes a time stamp of a SR (Sender Report) packet most recently received by the terminal 500 from the packet transceiver 110. In addition, the DLSR field indicates a delay time until the terminal 500 sends the packet (RR packet) back to the packet transceiver 110 in the SR report packet most recently received from the packet transceiver 110. Include.

The second handoff occurrence time predictor 130 predicts a second handoff occurrence time to be generated later based on the predicted first handoff occurrence time. At this time, the prediction is based on the Gauss-Markov model, which will be described in detail later.

And, the second handoff progress time of the terminal 500 means a predetermined time from the predicted second handoff occurrence time, but the embodiment of the present invention does not limit the progress time to a specific value. Although the progress time is not limited as described above, the second handoff progress time may be a time arbitrarily determined by the packet transmission period adjusting apparatus 100 or may be calculated based on the first handoff progress time in some cases.

The transmission period adjusting unit 140 calculates a second transmission period of the multimedia stream packet based on the predicted second handoff occurrence time. That is, the second transmission period of the multimedia stream packet is recalculated according to the second handoff occurrence time and the amount of packets not received by the terminal 500 during the second handoff progress time.

The multimedia streaming service provider 150 transmits the multimedia stream packet to the terminal 500 according to the second transmission period. That is, the packet is transmitted to the terminal 500 according to the second transmission period which is faster than the first transmission period, and thus all packets not transmitted during the second handoff progress time are transmitted.

Next, an operation process of the apparatus 100 for controlling a packet transmission period constituting the above configuration will be described.

3 is a flowchart sequentially illustrating an operation process of an apparatus for adjusting a packet transmission period according to an exemplary embodiment of the present invention.

As illustrated in FIG. 3, first, the packet transceiver 110 of the packet transmission period adjusting apparatus 100 transmits a multimedia stream packet to the terminal 500 based on the RTP (S401). At this time, the packet is transmitted to the terminal 500 according to the first transmission period calculated first.

Upon receiving the packet, the terminal 500 transmits an RR packet to the packet transceiver 110 indicating a packet reception state (for example, packet loss and packet loss rate, packet transmission delay, and jitter value) based on RTCP. .

The state diagnosis unit 120 of the packet transmission period adjusting device 100 collects and analyzes an RR packet received from the terminal 500 (S402) to diagnose a packet reception state for each terminal (S403). The unit 121 extracts the jitter value in the RR packet and then sequentially arranges the extracted jitter values to generate a jitter list (S404). That is, the jitter list generation unit 121 analyzes the K-th RR packet received from the terminal 500 to find the jitter value of the k-th packet transmitted to the terminal 500, and subsequently receives the j-th packet received from the terminal 500. By analyzing the K + 1st RR packet, the jitter value of the k + 1st packet transmitted to the terminal 500 is found. The jitter list generator 121 generates a jitter list based on the found jitter value for each packet. In this case, the jitter value for each packet is expressed by a predefined value.

Thereafter, the first handoff occurrence time prediction unit 122 calculates difference values between the jitter values of the generated jitter list, and then checks whether there is a difference value satisfying two predefined conditions among the calculated difference values. 1 Find out if a handoff has occurred. That is, the first handoff occurrence time prediction unit 122 checks whether the difference value between the jitter values satisfies the first condition that is greater than a predetermined reference value (S405), and when the result of the check satisfies, the difference values between the different jitter values are reference values. It is successively checked whether the second condition for maintaining a smaller constant value is satisfied (S406).

Thereafter, the first handoff occurrence time predictor 122 analyzes the LSR field and the DLSR field of the RR packet received from the terminal 500 to predict the first handoff occurrence time (S407).

The second handoff occurrence time predictor 130 predicts a second handoff occurrence time to be generated later based on the predicted first handoff occurrence time (S408). At this time, the prediction is based on the Gauss-Markov model.

First, if the initial moving speed of the terminal is known, the distance moved along with the moving speed of the terminal that changes with time can be predicted. In addition, the size of a cell managed by a base station is largely known in diameter. WiBro, an example of a wireless mobile system, has a fixed cell diameter of 1 km.

Therefore, assuming that the terminal moves in a straight line in the cell, and calculates the distance traveled by the terminal according to a predetermined formula, it is possible to predict a second handoff time of the terminal to be generated later using the previously recognized cell size.

Thereafter, the transmission period adjusting unit 140 is based on the estimated second handoff occurrence time, the second handoff progress time which is a predetermined time from the occurrence time, and the amount of packets not to be transmitted to the terminal 500 during the progress time. In operation S409, a second transmission period of the multimedia stream packet is calculated. That is, the second transmission period that can transmit all packets not transmitted during the second handoff progress time, instead of the first calculated transmission period, is recalculated. This second transmission period calculation method will be described below.

First, when the first transmission period that does not consider the transmission delay of the packet due to the handoff occurrence of the terminal 500 is λ s, the amount of packets sent by the packet transceiver 110 during time t, D (t) is Equation 1 is as follows.

After that, the time until the second handoff occurs is Δt, the second handoff progress time Δh, and the packet that the terminal 500 cannot receive during the second handoff progress time is PAR (FIG. 2). When the time taken to transmit to the terminal 500 via 300 is denoted τ, a display example thereof is shown in FIG. 4. FIG. 4 is a diagram conceptually illustrating a relationship between Δt corresponding to a packet available interval (service available) and Δh and τ corresponding to a non-packet interval available over time.

Subsequently, the terminal 500 receives D _adj (Δt) of a packet amount additionally to be received for Δt time (that is, a packet amount that the terminal cannot receive during the second handoff progress time), and the sub transmission period is μ1. D _adj (Δt) is represented by Equation 2 below.

=

=

In addition, since the amount of packets to be additionally received for Δt time is the same as the amount of packets to be received in the first transmission period for Δh + τ time, D _adj (Δt) may be expressed as Equation 3 below.

Accordingly, μ1, which is the subtransmission period of the recalculated packet, is as follows.

In this case, τ is a transmission period of λr, which is a new base station (base station to which the terminal is handed off) received by the new base station (base station to which the terminal is handed off) accumulated in the old base station (not shown, the base station to which the terminal is currently connected) for Δh. Is the time it takes to deliver. Therefore, τ can be expressed by Equation 5 below.

Subsequently, by substituting Equation 5 into Equation 4 calculated above, μ, which is a second transmission period of the packet, may be obtained by Equation 6 below.

Here, looking at the second transmission period μ according to Equation 6, it can be seen that the first transmission period is added to μ1, which is the previously calculated sub transmission period (Equation 4).

Thereafter, the multimedia streaming service provider 150 transmits the multimedia stream packet to the terminal 500 in accordance with the second transmission period according to Equation 6 (S410). That is, the packet is transmitted at a faster rate than the first transmission period to transmit all packets not transmitted during the second handoff progress time to the terminal 500.

Then, the terminal 500 temporarily stores the received packet in a buffer at a speed higher than the data reproduction speed and buffers it, thereby synchronizing with the reproduction speed.

As such, the apparatus and method for adjusting a packet transmission period in a high-speed portable Internet network according to an exemplary embodiment of the present invention predict the first and second handoff occurrence times of the terminal 500 and reconstruct the second transmission period of the streaming packet. After the calculation, according to the calculated second transmission period, all the packets that the terminal cannot receive during the second handoff progress time are transmitted to the terminal 500. As a result, the terminal 500 may process the packet received in the buffer even during the handoff in the wireless section (during the second handoff progress time), thereby reducing the quality of service delay caused by the handoff. Can be.

The drawings and detailed description of the invention are exemplary only, and are used for the purpose of illustrating the invention only, and are not intended to be limiting or to limit the scope of the invention described in the claims. Therefore, those skilled in the art will understand that various modifications and equivalent other embodiments are possible from this. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

An apparatus and method for adjusting a packet transmission period in a high-speed portable Internet network according to the present invention improve the quality of a multimedia streaming service due to frequent handoffs by transmitting a packet to a terminal that the terminal cannot receive during a handoff progress time. There is a good effect.

Claims (9)

In the high-speed portable Internet network for transmitting a multimedia stream packet to a terminal, the apparatus for adjusting the transmission period of the packet, A packet transmission / reception unit configured to receive a response packet regarding a reception state of a packet transmitted from the terminal according to a first transmission period; A state diagnosis unit configured to analyze the received response packet and calculate an occurrence time of a first handoff of a terminal most recently generated based on a current time; A second handoff occurrence time predicting unit configured to calculate a second handoff occurrence time of the terminal to be generated at the closest time based on the current time based on the calculated time of the first handoff occurrence; A transmission period adjusting unit configured to calculate a second transmission period of the packet based on the amount of packets not to be transmitted to the terminal during the second handoff progress time which is a predetermined time from the calculated second handoff occurrence time; And Multimedia streaming service provider for transmitting a multimedia stream packet to the terminal according to the calculated second transmission period Packet transmission period control device in a high-speed portable Internet network comprising a. According to claim 1, The multimedia streaming service provider, According to the calculated second transmission period, all packets not to be transmitted to the terminal during the second handoff progress time, together with packets to be transmitted until the second handoff proceeds, are all sent to the terminal until the start of the second handoff. Packet transmission period control device in a high-speed portable Internet network to be transmitted. The method according to claim 1 or 2, And the second transmission period is a packet transmission period adjusting apparatus in a high speed portable internet network which is faster than the first transmission period. The method according to claim 1 or 2, The second transmission period is the following equation

And the first transmission period is added to the sub transmission period according to the apparatus. μ1: Sub transmission period Δh: second handoff progress time which is a predetermined time from the calculated second handoff occurrence time τ: time taken by the new base station (the base station to which the terminal is to be handed off) received by the new base station (the base station to which the terminal is currently connected) and forwarded to the terminal. λs: the first transmission period Δt: time from the first handoff end time to the calculated second handoff occurrence time. According to claim 1, And the response packet includes a jitter value representing a loss rate and a transmission delay of a packet transmitted to the terminal as a predetermined value. The method of claim 5, The state diagnosis unit, A jitter list generator for extracting the jitter value for each packet transmitted to the terminal and generating the jitter list by sequentially arranging the extracted jitter values; And A first handoff occurrence time predicting unit predicting an occurrence time of the first handoff based on a predetermined field of a response packet received from the terminal when the jitter value of the generated jitter list satisfies a predetermined condition; Packet transmission period control device in a high-speed portable Internet network comprising a. In a high-speed portable Internet network for transmitting a multimedia stream packet to a terminal, the method for adjusting the transmission period of the packet, a) receiving a response packet including at least one of a loss ratio indicating a reception state of a packet transmitted from the terminal to the terminal according to a first transmission period, and a jitter value representing a transmission numerical value by a predetermined value; b) analyzing the received response packet to predict an occurrence time of a first handoff of a terminal most recently occurring based on a current time; c) predicting a time of occurrence of a second handoff of a terminal to occur at a closest time point based on the current time point based on the estimated time of occurrence of the first handoff; d) calculating a second transmission period of the packet based on the amount of packets not to be transmitted to the terminal during a second handoff progress time which is a predetermined time from the predicted second handoff occurrence time; And e) all of the packets not to be transmitted to the terminal during the second handoff progress time according to the calculated second transmission period together with the packets to be transmitted until the second handoff progress, to the terminal until the second handoff starts. Letting step Streaming transmission period control method in a high-speed mobile Internet network comprising a. The method of claim 7, wherein Step b), Extracting the jitter value for each packet transmitted to the terminal, and then sequentially generating the extracted jitter values to generate a jitter list; Among the jitter values of the generated jitter list, if the difference value between the jitter values for each of the first and second packets sequentially transmitted to the terminal is greater than a reference value, and the difference value for each jitter value of another packet is smaller than the reference value, Determining that a first handoff has occurred; And Predicting an occurrence time of the determined first handoff based on a predetermined field of the received response packet. Streaming transmission period control method in a high-speed mobile Internet network comprising a. The method of claim 7, wherein Step c) is Gauss-Markov for estimating the handoff occurrence time after calculating the moving speed and the moving distance of the terminal and then calculating the handoff occurrence time according to the calculated result value and the cell size of the previously recognized new base station (the base station to which the terminal is to be handed off). A method of adjusting a streaming transmission period in a high speed portable Internet network, which predicts a time point for generating a second handoff of the terminal based on a model.

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