KR20190027277A - Method for providing of throughput guidance and apparatus thereof - Google Patents

Abstract

The present invention relates to a method, in a base station, for providing bandwidth information to a content server based on wireless channel information and cell-load. More particularly, when a response packet to be transmitted from a terminal to the content server is not received for a predetermined period of time by the timer, the base station constructs a response packet in which bandwidth information is inserted and transmits the response packet to the content server, thereby solving a problem that the bandwidth transmission interval gets longer, and providing accurate bandwidth information to the content server quickly.

Description

METHOD FOR PROVIDING OF THROUGHPUT GUIDANCE AND APPARATUS THEREOF FIELD OF THE INVENTION [0001]

The present invention relates to a method of providing bandwidth information to a content server based on radio channel information and cell load in a base station, and more particularly, And a bandwidth information providing method in which a base station constructs a response packet including bandwidth information and transmits the response packet to a content server, and a device therefor.

The contents described in this section merely provide background information on the present embodiment and do not constitute the prior art.

In order to efficiently transmit content from a content server to a mobile terminal in a mobile communication system, it is necessary to utilize the available bandwidth as much as possible. In order to more efficiently utilize the bandwidth, the content server may employ a method of inferring a network environment by detecting RTT (Round Trip Time) measurement and packet loss on the transmission layer side, it is possible to use a method of inferring information using information received through a report. That is, the content server can adapt to the network by adjusting the TCP window size and the send rate or changing the resolution and encoding rate of the media based on the inferred network environment.

However, in the conventional method, since the content server is inferred based on information received without prior information, it is not easy to adapt to the instantly changed radio channel environment or cell load change, And thus waste of resources is generated. In addition, the content server may transmit data packets in excess of the available bandwidth due to erroneous reasoning, thereby causing a problem of packet loss and performance degradation.

Korean Unexamined Patent Application Publication No. 10-2004-0105032, Jun. 16, 2006 discloses a method of providing a bandwidth broker and a differentiated service for accessing a router belonging to a network path between a server and a client,

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a method and apparatus for estimating available bandwidth based on information on a radio channel environment and cell load, And to provide an apparatus and method for providing bandwidth information that can be transmitted by adding a calculated bandwidth information to an option field of an uplink TCP packet header transmitted from a terminal to a content server.

Particularly, the present invention is not a method of inserting bandwidth information into a corresponding uplink packet when an uplink packet is generated after waiting until an uplink packet transmitted to a content server is generated in order to transmit bandwidth information, When an uplink packet to be transmitted from the terminal to the content server is not generated during the set time, the base station constructs a response packet in which the bandwidth information is inserted and transmits the response packet to the content server, thereby solving the problem of a long bandwidth transmission interval, To a content server, and a content server is provided with a method of providing bandwidth information that can efficiently use network resources by checking bandwidth information suitable for a wireless channel environment and a cell load that are continuously changed It has its purpose.

However, the object of the present invention is not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood from the following description.

In order to accomplish the above object, a base station according to an embodiment of the present invention stores content packets transmitted from a content server to the terminal according to a request of the terminal, controls to be delivered to the terminal, And transmits the response packet including the bandwidth information to the content server when the response packet including the bandwidth information is received from the bandwidth provider apparatus A proxy device; And when a response packet for the content packet is not received from the terminal for a predetermined time by the timer after the content packet is delivered to the terminal by the proxy apparatus, Wherein the proxy apparatus is configured to request the proxy apparatus to construct a response packet, and if the response packet is configured by the proxy apparatus, insert the measured bandwidth information corresponding to the terminal into the configured response packet, And a bandwidth provisioning device for delivering the bandwidth request to the proxy device.

At this time, when the response packet for the content packet is received from the terminal, the proxy apparatus can delete the stored content packet.

In addition, the bandwidth providing apparatus may start the timer according to a predetermined timer value for bandwidth information transmission when the proxy apparatus stores a content packet to be delivered to the terminal.

At this time, the preset timer value may be set according to the cell environment or may be set according to the radio environment and mobility of the UE.

In addition, the bandwidth providing apparatus determines whether to insert the bandwidth information according to the QoS information of the bearer set corresponding to the terminal or the service information corresponding to the terminal, and starts the timer only when the insertion of the bandwidth information is determined .

In addition, the bandwidth providing apparatus may insert the bandwidth information into the header of the response packet and control the bandwidth request to be transmitted to the content server.

In addition, the bandwidth providing apparatus may reset the timer when a response packet including bandwidth information is transmitted to the content server.

According to another aspect of the present invention, there is provided a method for providing bandwidth information, the method comprising: storing, when a content packet is received from a content server to a terminal according to a request of the terminal, Starting a timer; Configuring a response packet for the content packet if a response packet for the content packet is not received from the terminal for a predetermined time by the timer after delivering the content packet to the terminal; And inserting the measured bandwidth information corresponding to the terminal into the configured response packet and transmitting the inserted bandwidth information to the content server.

If a response packet for the content packet is received from the terminal within a predetermined time by the timer after the content packet is transmitted to the terminal, the terminal inserts bandwidth information into the response packet received from the terminal, Transmitting to a content server; And resetting the timer and deleting the stored content packet.

Also, before starting the timer, it is determined whether to insert the bandwidth information according to the QoS information of the bearer set corresponding to the terminal or the service information corresponding to the terminal, Only the timer can be started.

Transmitting the pre-stored content packet to the terminal continuously after transmitting the content packet to the content server; And deleting the stored content packet when a response packet for the content packet is received from the terminal.

Further, the present invention can provide a computer-readable recording medium on which a program for executing the above-described method is recorded.

According to the method and apparatus for providing bandwidth information of the present invention, the base station estimates available bandwidth of a terminal based on information on a wireless channel environment and cell load monitoring, and calculates bandwidth information, To the option field of the uplink packet header transmitted to the content server by the terminal, the content server can more quickly confirm the bandwidth information suitable for the radio channel environment and the cell load to be changed instantaneously, Can be used more efficiently.

According to the present invention, when an uplink packet to be transmitted from the terminal to the content server is not generated for a preset time, the base station constructs a response packet in which the bandwidth information is inserted and transmits the response packet to the content server, The problem can be solved and accurate bandwidth information can be quickly provided to the content server.

In addition, the base station of the present invention can continuously and effectively transmit valid bandwidth information to the content server by varying the time for providing the bandwidth information according to the radio channel environment and the cell load, Accordingly, the available bandwidth can be utilized to the maximum, and the packet loss can be minimized in advance, thereby improving the quality of the user experience.

In addition, various effects other than the above-described effects can be directly or implicitly disclosed in the detailed description according to the embodiment of the present invention to be described later.

1 is an exemplary diagram illustrating a network system to which a bandwidth information providing method according to an embodiment of the present invention is applied.
2 to 3 are data flow charts for explaining a bandwidth providing method according to an embodiment of the present invention.
4 is a block diagram illustrating a main configuration of a base station according to an embodiment of the present invention.
5 and 6 are flowcharts for explaining operations in a base station according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the detailed description of known functions and configurations incorporated herein will be omitted when it may unnecessarily obscure the subject matter of the present invention. This is to omit the unnecessary description so as to convey the key of the present invention more clearly without fading. While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. However, it should be understood that the invention is not limited to the specific embodiments thereof, It is to be understood that the invention is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

In addition, when referring to an element as being "connected" or "connected" to another element, it means that it can be connected or connected logically or physically. In other words, it is to be understood that although an element may be directly connected or connected to another element, there may be other elements in between, or indirectly connected or connected.

Also, the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. It is also to be understood that the terms such as " comprising "or" having ", as used herein, are intended to specify the presence of stated features, integers, It should be understood that the foregoing does not preclude the presence or addition of other features, numbers, steps, operations, elements, parts, or combinations thereof.

Now, a method and apparatus for providing bandwidth information according to an embodiment of the present invention will be described in detail with reference to the drawings. Here, the same reference numerals are used for similar functions and functions throughout the drawings, and a duplicate description thereof will be omitted. Furthermore, in order to avoid obscuring the concept of the present invention, well-known structures and devices may be omitted, or may be shown in block diagram form centering on the core functions of each structure and device.

Hereinafter, a network system to which a bandwidth information providing method according to an embodiment of the present invention is applied will be described first.

1 is an exemplary diagram illustrating a network system to which a bandwidth information providing method according to an embodiment of the present invention is applied.

Referring to FIG. 1, the terminal 100 of the present invention may include a browser for transmitting / receiving information, a memory for storing programs and protocols, a microprocessor for executing and controlling various programs, and the like. 200 and may be connected to the access network 510 through the access network 510 and may be connected to the core network 520 via the access network 510. [

The terminal 100 of the present invention may be connected to the access network 510 through the base station 200 and may be connected to the core network 520 and may be connected to the content server 300 through the Internet network 530, Can be established. The terminal 100 can request content from the content server 300 through the access network 510, the core network 520 and the Internet network 530 and can receive and use the content transmitted from the content server 300 have. At this time, the terminal 100 can receive content from the content server 300 on a packet-by-packet basis, generate a response packet for each content packet, and transmit the response packet to the content server 300.

The terminal 100 of the present invention can be replaced with terms such as User Equipment (UE), Mobile Station (MS), Mobile Subscriber Station (MSS), and Subscriber Station (SS) In addition, it can be implemented in the form of a mobile terminal such as a smart phone, a tablet PC, and a PDA (Personal Digital Assistants) that can be carried by a user of the terminal 100 of the present invention. Or may be implemented in the form of a navigation device that can be used as a navigation device.

A base station (BS) 200 is a terminal node of a network that directly communicates with a terminal 100, and is connected to a terminal 100 existing within a communicable distance through a wireless channel, Refers to a fixed station that supports wireless communication of the base station 100 and is connected to the access network 510. The base station 200 of the present invention may be implemented as a BTS (Base Station Transmission System) in a synchronous (CDMA) network and may include a base station controller (BSC) that controls a base station. Also, in the asynchronous (WCDMA) network, the BTS may be replaced with a NodeB, and the BSC may be replaced with an RNC (Radio Network Controller). In addition, it can be implemented as an eNodeB that is an evolved base station type in an LTE (Long Term Evolution) network.

In addition, the base station 200 according to an exemplary embodiment of the present invention includes one or more cells. The base station 200 may transmit a radio channel of the terminal 100 according to a control protocol such as a Radio Resource Control Protocol And control transmission and reception of a radio frame through the set radio channel.

At this time, the communication from the base station 200 to the terminal 100 is called downlink communication, and the communication from the terminal 100 to the base station 200 is called uplink communication. In addition, in the downlink, the transmitter may be part of the base station 200, and the receiver may be part of the terminal 100. In the uplink, the transmitter may be part of the terminal 100, and the receiver may be part of the base station 200. In addition, the multiple access schemes for downlink and uplink transmission may be the same or different from each other. For example, the downlink may use OFDMA (Orthogonal Frequency Division Multiple Access), and the uplink may use SC-FDMA (Single Carrier-Frequency Division Multiple Access).

In addition, the wireless channel environment of the base station 200 to which the terminal 100 accesses can be continuously changed due to various factors such as the number of connected terminals 100 and the like. Also, the terminal 100 can continuously move, and when moving at a high speed, the handoff to the connected cell can be performed rapidly.

Thus, the surrounding environment of the terminal 100 can be continuously changed. Therefore, the base station 200 to which the terminal 100 is currently connected must be able to quickly measure the bandwidth information of the peripheral network environment of the terminal 100 and transmit the measured bandwidth information to the content server 300. The base station 200 of the present invention inserts the bandwidth information into the header of the response packet and transmits the response packet to the content server 300 when the response packet for the content packet transmitted from the terminal 100 to the content server 300 is confirmed . In this case, the base station 300 according to the embodiment of the present invention sets a timer, and if a response packet is not received for a content packet transmitted from the terminal 100 to the content server 300 for a preset time by the timer, A response packet for the content packet is formed, the measured bandwidth information corresponding to the terminal is inserted into the configured response packet, and the response packet including the bandwidth information is transmitted to the content server 300.

More specifically, the operation in the base station 200 will be described later.

Meanwhile, the core network 520 of the present invention performs circuit switching or packet switching, and performs a main function for a mobile communication service such as mobility control and switching. Lt; RTI ID = 0.0 > and / or < / RTI > In addition, the core network 520 may manage inter-frequency mobility and perform a role for interworking with traffic in the base station 200 and the core network 520 and with other networks, such as the Internet network 530. The core network 500 may include a Mobile Switching Center (MSC), a Home Location Register (HLR), a Mobile Mobility Entity (MME), and a Home Subscriber Server (HSS).

In this network system, the terminal 100 can be connected to the access network 510 and the core network 520 through the base station 200. Upon completion of the initial access procedure, A bearer is set up and an EPC bearer can be set in the base station 200 and the core network 520. [ The base station 200 of the present invention can set and manage such bearer information, and can insert the bandwidth information into a response packet transmitted to the content server 300 according to the set bearer, and transmit the bandwidth information to the content server 300.

The content server 300 can establish a TCP session with the terminal 100 and receive the content request from the terminal 100 in which the TCP session is established and transmit the content to the terminal 100 on a packet- . In addition, the content server 300 of the present invention can receive a response packet including bandwidth information, check the bandwidth information of the received response packet, and adjust the TCP window size and the send rate Or adaptively modifying the resolution and encoding rate of the media to support the adaptive communication service according to the bandwidth information.

A processor installed in the terminal 100, the base station 200, and the content server 300 according to the embodiment of the present invention may be implemented by a method according to the present invention Lt; RTI ID = 0.0 > a < / RTI > In one implementation, the processor may be a single-threaded processor, and in other embodiments, the processor may be a multithreaded processor. Further, the processor is capable of processing instructions stored on a memory or storage device.

Hereinafter, a method of providing bandwidth information according to an embodiment of the present invention will be described in more detail.

2 to 3 are data flow charts for explaining a bandwidth providing method according to an embodiment of the present invention.

2 is a data flow diagram for explaining a method of providing a bandwidth when a content packet is normally transmitted to the AT 100. Referring to FIG.

As shown in FIG. 2, the terminal 100 and the base station 200 according to the embodiment of the present invention may perform an initial attach (S101). 1, the terminal 100 transmits an attach request message to the core network 520 via the access network 510 via the base station 200, the base station 200 transmits the attach request message to the core network 520 The MME (not shown) of the core network 520 can transmit the cell ID and the TAI information connected to the terminal 100. The MME (not shown) in the core network 520 registers an access location of the terminal 100 and confirms the QoS profile of the terminal 100 in cooperation with an HSS (not shown) Can be performed. The MME (not shown) of the core network 520 then assigns the IP address assigned by the P-GW (not shown) to the terminal 100 and transmits the EPS bearer to be used by the terminal 100 to the P-GW , And an S-GW (not shown). The service parameters of the EPS bearer allocated at this time may be set based on the service information identified corresponding to the terminal 100. [ After the EPS bearer between the base station 200 and the core network 520 is allocated through this process, a radio bearer between the terminal 100 and the base station 200 can be allocated. 200 to the access network 510 and then to the Internet network 530 via the S-GW (not shown) and the P-GW (not shown) of the core network 520.

In the specification of the present invention, all the communication procedures for connecting the terminal 100 to the content server 300 via the access network 510, the core network 520, and the Internet network 530 are referred to as an initial access procedure . For convenience of explanation, FIG. 2 schematically shows an initial connection process between the terminal 100 and the base station 200, but it should be noted that the initial access procedure of the present invention means the entire process described above.

The terminal 100 can access the content server 300 through the Internet 530 and establish a TCP session between the terminal 100 and the content server 300 at step S103. Here, the TCP session establishment process can be performed according to various known procedures such as 3-way handshake and 4-way handshake.

The communication between the terminal 100, the base station 200 and the content server 300 in which the TCP session is established can be performed according to a protocol stack including a plurality of layers. For example, the communication protocol stack of the AT 100 may include an application layer, a TCP / IP layer, a Packet Data Control Protocol (PDCP) layer, a radio link control (RLC) layer, A Medium Access Control (MAC) layer, and a Physical layer (L1 layer). The communication protocol stack of the base station 200 may include a PDCP layer, an RLC layer, a MAC layer, and a physical layer. The communication protocol stack of the content server 300 may include an application layer, a TCP / IP layer, and an L2 / L1 layer.

According to the protocol stack, the terminal 100 can request content to the content server 300 (S105). For example, when the terminal 100 transmits a user's content request generated through the application layer to the physical layer via each layer of the protocol stack, the physical layer transmits data to be transmitted to the wireless layer using the allocated time- To the base station 200. The base station 200 transmits the content request to the content server 300 in step S107 and the content server 300 transmits the content request transmitted from the terminal 100 via the L2 / L1 layer, the TCP / IP layer, Lt; / RTI >

Thereafter, the content server 300 transmits the content to the terminal 100 in response to the request of the terminal 100. At this time, the content can be transmitted according to the communication protocol stack as described above. At this time, the content transmitted to the terminal 100 by the content server 300 can be sequentially transmitted on a packet-by-packet basis, May be transmitted to the terminal 100 via the terminal 200 (S109).

In particular, when the content packet transmitted from the content server 300 to the terminal 100 is confirmed, the base station 200 starts driving a timer for bandwidth provision (S111). In this case, the base station 200 according to the embodiment of the present invention checks the service information for the terminal 100 identified through the authentication procedure in step S101, or checks the bearer type, bearer QoS parameters, And may determine whether to start the timer after confirming whether or not to provide the bandwidth information.

The base station 200 of the present invention performing the function of the proxy server can store all the packets transmitted and received between the terminal 100 and the content server 300 and thus can store packets transmitted from the content server 300 to the terminal 100 (S113), and controls the process of transmitting (S115) to the terminal 100 according to the communication protocol stack as described above.

At this time, when the terminal 100 normally receives the content packet, the terminal 100 constructs a response packet indicating that the reception is normally completed, and transmits the response packet to the content server 300 through the base station 200 (S117).

At this time, when the contents response packet is received from the terminal 00, the base station 200 of the present invention for monitoring the above process temporarily stores the response packet and transmits the bandwidth information (TG) to be inserted into the contents response packet (S119), and adds the calculated bandwidth information to the content response packet (S121). Here, the base station 200 of the present invention can calculate the bandwidth information at the time of receiving the content response packet as in step S119. After driving the timer (S111) Cell load, etc., to estimate available bandwidth and to calculate bandwidth information.

In addition, the base station 200 of the present invention may insert bandwidth information into a content response packet header transmitted from the terminal 100 to the content server 300, but is not limited to a content response packet. That is, the base station 200 according to the embodiment of the present invention inserts the bandwidth information into the uplink packet transmitted from the terminal 100 to the content server 300, and transmits the inserted uplink packet. Various acknowledgment packets (ACK) as well as various uplink packets may be applied.

After the bandwidth information is included in the response packet and transmitted to the content server 300, the base station 200 of the present invention deletes the data generated during the role of the proxy server, for example, the content packet cached in step S113 Thereafter, the timer is reset (S127).

Hereinafter, a method of providing bandwidth information when content is not normally delivered to the terminal 100 will be described with reference to FIG.

For convenience of description, FIG. 3 will be described with reference to the steps after the process of FIG. That is, the terminal 100 is connected to the core network 520 through the initial access procedure via the base station 200, and the TCP session with the content server 300 is established.

In this state, the base station 200 confirms a content packet transmitted from the content server 300 to the terminal 100 according to a request of the terminal 100 (S201). As the content packet transmitted to the terminal 100 is confirmed, the base station 200 starts driving the timer (S203) and stores the delivered content packet (S205), as described with reference to FIG. Here, the base station 200 of the present invention may start driving the timer after storing the content packet.

Thereafter, the base station 200 transmits the content packet transmitted from the content server 300 to the terminal 100, and waits for the response packet to be received from the terminal 100. At this time, if the content response packet is not received from the terminal 100, the base station 200 can repeatedly transmit the pre-stored content packet to the terminal 100 in step S205. Here, retransmission may refer to retransmission involved in the MAC / RLC layer in the communication protocol stack described above.

At this time, when the timer value preset by the base station 200 expires (S209), the base station 200 calculates the bandwidth information as described in step S119 of FIG. 2 (S119), and transmits arbitrary contents After configuring the response packet, the calculated bandwidth information is inserted into the response packet and added (S121).

The base station 200 transmits the content response packet including the bandwidth information to the content server 300 and transmits the previously stored content packet to the terminal 200 until the terminal 200 normally receives the content packet. (S217). ≪ / RTI > The retransmission in step S217 may be a retransmission in the TCP / IP layer related to the proxy operation performed in the base station 200 of the present invention, unlike the retransmission performed in step S207.

Thereafter, when the terminal 100 normally receives the content packet transmitted from the base station 200 to the terminal 100, the terminal 100 transmits a content response packet to the base station 200 in response thereto (S219) , The base station 200 deletes the pre-stored content packet upon receiving the content response packet from the terminal 100 (S221), and may reset the timer (S223).

The base station 200 according to the embodiment of the present invention provides the bandwidth information corresponding to the terminal 100 to the content server 300 and receives a packet transmitted from the terminal 100 to the content server 300 The base station 200 attempts to retransmit the content packet for a preset time by applying a timer set in accordance with the network condition, but when the timer expires, the content of the content being transmitted to the terminal 100 by the base station 200 A response packet for a packet is arbitrarily constructed and the bandwidth information is inserted into the corresponding content response packet and transmitted to the content server 300 so that even if the terminal 100 is moving at a high speed or the communication environment of the terminal 100 is poor, It is possible to provide the bandwidth information to the content server 300 quickly. In addition, the content server 300 of the present invention can more easily confirm the bandwidth information generated by the base station 200 through the response packet, maximizes the bandwidth, and at the same time, So that the network resources can be used more efficiently.

Hereinafter, the main configuration and operation of the base station 200 according to the embodiment of the present invention for performing the above-described process will be described.

4 is a block diagram illustrating a main configuration of a base station according to an embodiment of the present invention.

Referring to FIG. 4, a base station 200 according to an embodiment of the present invention may include a communication interface device 210, a proxy device 220, and a bandwidth providing device 230. For convenience of explanation, the proxy device 200 and the bandwidth providing device 230 are connected to the base station 200 in the base station 200 for the sake of convenience of explanation. Let's take an example that exists in module form. However, the present invention is not limited to the apparatus configuration. In other words, the base station 200 of the present invention performs only a unique communication function in the wireless communication system, and the proxy apparatus 220 and the bandwidth providing apparatus 230 of the present invention are adjacent to the base station 200, Or may be implemented as a separate server capable of communicating with the server. Hereinafter, for convenience of explanation, it is assumed that the base station 200 includes the proxy device 220 and the bandwidth providing device 230. [

First, the communication interface unit 210 of the present invention controls the connection process with the terminal 100, allocates radio resources to the terminal 100, controls the process of connecting to the core network 520 of the terminal 100 . The communication interface device 200 of the present invention monitors information transmitted and received between the terminal 100 and the content server 300. The communication interface device 200 forwards information sent and received by the proxy device 200 performing a proxy function, So that the process can be controlled.

The proxy device 220 plays a role of forwarding and temporarily storing packets transmitted and received between the terminal 100 and the content server 300. For example, the proxy apparatus 200 may store content delivered to the terminal 100 by the content server 300 in a packet unit, and may store a packet transmitted by the terminal 100 to the content server 300.

In addition, the proxy device 220 of the present invention may configure a response packet for a specific content according to a request of the bandwidth providing device 230. For example, after the content server 300 transmits a content packet to the terminal 100, if the terminal 100 can not normally receive the content packet, the proxy device 220 transmits the content packet to the bandwidth provision device 230 A response packet for the content packet can be arbitrarily configured, a response packet is transmitted to the bandwidth provision device 230, the response packet including the bandwidth information is again received from the bandwidth provision device 230, ). ≪ / RTI >

The proxy device 220 of the present invention transmits the content response packet including the bandwidth information to the content server 300 and continuously transmits the content packet stored until the normal content response packet is received from the terminal 100 (100). Thereafter, when the content response packet for the content packet is normally received from the terminal 100, the proxy device 220 can delete the content packet stored in the caching module 221.

The bandwidth providing apparatus 230 according to the embodiment of the present invention calculates the bandwidth information defined in the present invention and transmits the bandwidth information to the content server 300. The bandwidth providing apparatus 230 includes a TG calculation module 231, 231) and a timer management module 233.

More specifically, the TG calculation module 231 of the present invention calculates bandwidth information corresponding to the terminal 100. The TG calculation module 231 of the present invention can continuously monitor the wireless channel environment and the cell load connected to the terminal 100 to estimate the available bandwidth and calculate the bandwidth information accordingly. At this time, the TG calculation module 231 may calculate information for bandwidth estimation corresponding to each layer constituting the communication protocol stack, and use the information for estimating the bandwidth to determine a bandwidth available for the terminal 100 Information can be calculated.

The TG insertion module 232 controls the transmission of the bandwidth information calculated through the TG calculation module 231 into an uplink packet transmitted to the content server 300 by the terminal 100, Can play a role. In particular, the TG insertion module 232 of the present invention inserts the bandwidth information into the header of a response packet corresponding to a specific content packet transmitted to the content server 300, and then transmits the bandwidth information to the proxy device 220, 220 can transmit a response packet including the bandwidth information to the content server 300.

In addition, the TG insertion module 232 according to the embodiment of the present invention checks the service information corresponding to the terminal 100 or determines whether to insert the bandwidth information according to the QoS information of the bearer set corresponding to the terminal 100 And may insert the bandwidth information into the response packet only when it is determined to insert the bandwidth information.

The timer management module 233 sets and manages information about the timer according to the embodiment of the present invention. In particular, the timer management module 233 of the present invention can set and manage a time value for a timer for transmission of bandwidth information. At this time, the time value for the timer means information about the time set in the present invention for inserting the bandwidth information, and is information that can be set according to the cell environment or in accordance with the terminal 100. For example, the timer management module 233 can change the timer value according to the bearer set after the bearer setup is completed according to the initial connection procedure of the terminal 100. [ It is also possible to set the timer value corresponding to the terminal 100 by setting the cell environment of the terminal 100 to be constant.

The timer management module 233 of the present invention can start the timer when it is determined that the content packet transmitted from the content server 300 to the terminal 100 has arrived at the proxy device 220. The timer management module 233 may start a timer according to a request from the TG insertion module 232 when it is determined to insert the bandwidth information in the TG insertion module 232. [ The timer management module 233 can check whether the timer expires. If it is confirmed that the timer has expired, the timer management module 233 can inform the TG insertion module 232 that the timer has expired for inserting the bandwidth information.

The operation of the base station 200 according to the present invention will be described with reference to FIGS. 5 and 6. FIG.

5 and 6 are flowcharts for explaining operations in a base station according to an embodiment of the present invention.

5, the bandwidth providing device 230 of the base station 200 continuously monitors the wireless channel environment, the cell load, and the like through the communication interface device 210 (S301) and sets a value for the timer (S303). The timer can be set in units of a bearer, and the operator can directly set a value according to the cell environment or set according to the monitoring result in step S301. Also, the timer may be set corresponding to the subscriber information of the terminal 100. The base station 200 may reset the timer value when the cell environment changes, such as the radio channel environment and the cell load, and may reset the timer value at a predetermined periodicity.

With the timer value being set through this process, the base station 200 of the present invention can perform the operation of FIG.

6 is a flowchart illustrating a method of providing bandwidth information from a base station according to an embodiment of the present invention.

The base station 200 of the present invention can support the initial access procedure of the terminal 100 as described with reference to FIGS. 1 to 3. When the initial access procedure of the terminal 100 is completed, 210 may establish a radio bearer between the UE 100 and the BS 200 and may configure an EPC bearer between the BS 200 and the CN 520 at step S401.

Thereafter, the base station 200 of the present invention can determine whether bandwidth information transmission is necessary corresponding to the terminal 100. [ For example, the base station 200 of the present invention can confirm the service information of the terminal 100 in the bearer setup process, and can confirm whether the bandwidth information is required to be inserted using the confirmed service information (S403). In addition, the base station 200 of the present invention may check the bearer type set in the terminal 100 and determine whether to insert bandwidth information according to the bearer type (S403).

As a result of the determination in step S403, if it is determined that the insertion of the bandwidth information is unnecessary, the base station 200 of the present invention performs only the role of a general base station and terminates without performing the following process for providing bandwidth information.

If it is determined in step S403 that the bandwidth information insertion is necessary, the base station 200 of the present invention can perform the proxy operation and the bandwidth information insertion operation. That is, the base station 200 of the present invention checks whether there is a content packet transmitted from the content server 300 to the terminal 100 (S405). Here, step S405 of the present invention may be performed before step S403.

When the content packet transmitted from the content server 300 to the terminal 100 is confirmed at the request of the terminal 100, the base station 200 starts a predetermined timer at step S407.

Here, the timer is information that can be set according to the service information to which the terminal 100 subscribes, or information that can be changed according to the cell environment or the bearer setting as described with reference to FIG.

In addition, the base station 200 of the present invention capable of performing the proxy function mirrors and stores the content packet transmitted from the content server 300 to the terminal 100 (S409). Thereafter, the base station 200 confirms a response packet corresponding to the content packet transmitted from the terminal 100 (S410), and confirms whether a response packet is received (S411). The above process can be continuously performed until the timer started in step S407 expires.

If it is determined in step S411 that the response packet transmitted from the terminal 100 to the content server 300 has been received in step S411, the base station 200 of the present invention calculates the bandwidth information in step S419, After inserting the bandwidth information into the response packet (S421), the response packet including the bandwidth information is transmitted to the content server 300 (S423).

On the other hand, if the response packet is not received in step S411 and the timer expires (S413), the base station 200 of the present invention constructs an arbitrary response packet (S417), calculates bandwidth information (S419) The bandwidth information is inserted into the response packet (S421). At this time, the calculated bandwidth information can be calculated by estimating an available bandwidth according to a result of monitoring a wireless channel environment, a cell load, and the like. In addition, the base station 200 of the present invention inserts the calculated bandwidth information into the header of the configured response packet.

Then, the base station 200 transmits a response packet including the bandwidth information to the content server 300 (S423), and resets the timer when the transmission of the response packet is completed (S425).

This process can be performed until the bearer set up corresponding to the UE 100 is released. The timer is driven on a packet-by-packet basis and bandwidth information is inserted into the uplink packet transmitted from the UE 100 to the content server 300 Once delivered, the timer is reset.

The method of providing bandwidth information according to the embodiment of the present invention has been described above.

In particular, the method for providing bandwidth information according to an embodiment of the present invention may be provided in the form of a computer readable medium suitable for storing computer program instructions and data.

In particular, the computer program of the present invention is characterized in that, when a content packet transmitted from a content server to a terminal is received according to a request of the terminal, the content packet is stored and then a timer is started. After the content packet is delivered to the terminal Configuring a response packet for the content packet when the timer expires because a response packet for the content packet is not received from the terminal for a predetermined time, And transmitting the information to the content server and resetting the timer.

Such a computer-readable recording medium may include program instructions, data files, data structures, etc., singly or in combination, and includes all kinds of recording apparatuses in which data that can be read by a computer system is stored. Examples of the computer-readable recording medium include an optical recording medium such as a magnetic medium such as a hard disk, a floppy disk and a magnetic tape, a compact disk read only memory (CD-ROM), and a digital video disk (ROM), random access memory (RAM), flash memory, and the like, such as a magneto-optical medium such as a magneto-optical medium and a floppy disk, And hardware devices that are specifically configured to perform the functions described herein.

In addition, the computer-readable recording medium may be distributed over network-connected computer systems so that computer readable codes can be stored and executed in a distributed manner. In addition, functional programs, codes, and code segments for implementing the present invention can be easily inferred by programmers of the technical field to which the present invention belongs.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be appreciated by those skilled in the art that numerous changes and modifications can be made to the invention. And all such modifications and changes as fall within the scope of the present invention are therefore to be regarded as being within the scope of the present invention.

The present invention relates to a method of providing bandwidth information to a content server based on radio channel information and cell load in a base station, and more particularly, And a bandwidth information providing method in which a base station constructs a response packet including bandwidth information and transmits the response packet to a content server, and a device therefor.

According to the present invention, if an uplink packet to be transmitted from the terminal to the content server is not generated for a predetermined time, the base station constructs a response packet including the bandwidth information and transmits the response packet to the content server, And the accurate bandwidth information can be quickly provided to the content server, so that the content server can utilize the network resources more efficiently. The present invention is not only sufficient in terms of marketability or sales, but also can be practically and practically carried out There is a potential for industrial use.

100: terminal
200: base station
210: Communication interface device
220: Proxy device
230: Bandwidth provider
231: TG calculation module
232: TG insertion module
233: Timer management module
300: Content server

Claims (12)

A content packet transmitted from the content server to the terminal according to the request of the terminal is stored and is controlled to be delivered to the terminal, and a response packet is transmitted to the bandwidth provider A proxy device for transmitting a response packet in which the bandwidth information is inserted to the content server when a response packet including bandwidth information is received from the bandwidth provision device; And
When a response packet for the content packet is not received from the terminal for a predetermined time by the timer after the content packet is delivered to the terminal by the proxy device, Wherein when the response packet is configured by the proxy apparatus, the measured bandwidth information corresponding to the terminal is inserted into the configured response packet, and then the response packet into which the bandwidth information is inserted is transmitted to the proxy apparatus A bandwidth provisioning device for delivering to a device;
And a base station. The method according to claim 1,
The proxy device
And deletes the stored content packet when a response packet for the content packet is received from the terminal. The method according to claim 1,
The bandwidth providing device
Wherein the proxy device starts the timer according to a predetermined timer value for bandwidth information transmission when a content packet to be transmitted to the terminal is stored. The method of claim 3,
The preset timer value
And is set according to a cell environment or according to a radio environment and mobility of the terminal. The method according to claim 1,
The bandwidth providing device
Determines whether to insert the bandwidth information according to the QoS information of the bearer set corresponding to the terminal, and starts the timer only when insertion of the bandwidth information is determined. The method according to claim 1,
The bandwidth providing device
Inserting the bandwidth information into the header of the response packet and controlling the bandwidth information to be transmitted to the content server. The method according to claim 1,
The bandwidth providing device
Wherein the timer is reset when a response packet including bandwidth information is transmitted to the content server. The base station,
When receiving a content packet from a content server to a terminal according to a request of the terminal, storing the content packet and starting a timer;
Configuring a response packet for the content packet if a response packet for the content packet is not received from the terminal for a predetermined time by the timer after delivering the content packet to the terminal; And
Inserting the measured bandwidth information corresponding to the terminal into the configured response packet and transmitting the inserted bandwidth information to the content server;
And transmitting the bandwidth information. 9. The method of claim 8,
After delivering the content packet to the terminal,
When a response packet for the content packet is received from the terminal within a predetermined time by the timer,
Inserting bandwidth information into the response packet received from the terminal and transmitting the bandwidth information to the content server; And
Resetting the timer and deleting the stored content packet;
The method of claim 1, further comprising: 9. The method of claim 8,
Prior to starting the timer,
Determines whether to insert the bandwidth information according to the QoS information of the bearer set corresponding to the terminal, and starts the timer only when it is determined to insert the bandwidth information. Delivery method. 9. The method of claim 8,
After the step of transmitting to the content server,
Continuously transmitting the pre-stored content packet to the terminal; And
When receiving a response packet for the content packet from the terminal, deleting the stored content packet;
The method of claim 1, further comprising: A computer-readable recording medium storing a program for executing the method according to any one of claims 8 to 11.

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