KR20040064347A - Method of processing packet data and an apparatus thereof - Google Patents

Abstract

PURPOSE: A method and apparatus for processing packet data are provided to perform encoding suitable for a data source, accurately control the amount of data transmission and effectively control a network. CONSTITUTION: A wired/wireless section discriminating unit(80) is positioned in a UTRAN(Universal Mobile Telecommunications Network Terrestrial Radio Access Network)(200) and logically positioned at an upper position of a RAN(Radio Access Network) protocol layer. The UTRAN(200) is a network for matching a wired section and a wireless section. The wired/wireless section discriminating unit(80) discriminates a transmission section of an RTP(Real-time Transport Protocol) packet by a wired section and a wireless section and processes the RTP packet transferred through the wired section from a core network(300), and transmits an RTCP(RTP Control Protocol) packet from an end of the wired section to a data source(70) to perform operations of the RTP and the RTCP. The wired/wireless section discriminating unit(80) broadcasts and/or multicasts the RTP packets received from the data source(70) to multiple terminals(100) through a downlink radio channel. Upon receiving the RTP packets, the terminals(100) transmits receiving state information with respect to the received RTP packets to the wired/wireless section discriminating unit(80) through the wireless section.

Description

Method of processing packet data and apparatus for same

The present invention relates to a communication system, and more particularly, to a method and apparatus for processing packet data in a mobile communication system.

UMTS (Universal Mobile Telecommunications System) is a third generation mobile communication system that has evolved from the European standard Global System for Mobile Communications (GSM) system.It is based on GSM Core Network and Wideband Code Division Multiple Access (WCDMA) access technology. It aims to provide a better mobile communication service.

For the standardization of UMTS, in December 1998, ETSI in Europe, ARIB / TTC in Japan, T1 in the US and TTA in Korea were referred to as the Third Generation Partnership Project (hereinafter abbreviated as 3GPP). The project has been organized and is currently developing a detailed specification of UMTS.

In 3GPP, in order to develop a fast and efficient technology of UMTS, the standardization work of UMTS is referred to as 5 Technical Specification Groups (hereinafter referred to as TSG) in consideration of the independence of network components and their operation. Divided into proceeds.

Each TSG is responsible for the development, approval, and management of standards within the relevant areas, among which the Radio Access Network (hereinafter referred to as RAN) group (TSG RAN) supports WCDMA access technology in UMTS. We will develop a specification for the functions, requirements and interfaces of the UMTS radio network (Universal Mobile Telecommunications Network Terrestrial Radio Access Network, hereinafter referred to as UTRAN).

1 is a diagram illustrating a network structure of a general UMTS.

Referring to FIG. 1, the UMTS system includes a terminal 100, a UTRAN 200, and a core network 300.

The UTRAN 200 is composed of a plurality of Radio Network Sub-systems 10a to 10n. Each radio network subsystem 10a, 10b, ..., 10n is managed by one Radio Network Controller (hereinafter abbreviated as RNC) 12; 14 and the RNC 12; It consists of a plurality of Node Bs (11a to 11b; 13a to 13b). The Node Bs 11a-11b; 13a-13b are managed by the RNC 12; 14. The Node Bs 11a through 11b and 13a through 13b receive uplink signals transmitted from the terminal 100 at a physical layer level and transmit downlink signals to the terminal 100. In other words, the Node Bs 11a to 11b; 13a to 13b serve to transmit / receive signals to / from the terminal 100, thereby connecting the terminal 100 to the UTRAN 200. It acts as an access point. The RNC 12; 14 is responsible for allocating and managing radio resources, and serves as an access point for connecting the Node Bs 11a-11b; 13a-13b to the core network 300. Each terminal connected to the UMTS network is managed by a specific RNC (12; 14) in the UTRAN (200), which is called a Serving RNC (SRNC), and the SRNC is the core network for data transmission of a specific terminal. It serves as an access point to 300, and allocates a radio resource suitable for providing a service to the specific terminal. The terminal connected to the core network 300 through the UTRAN 200 has only one SRNC. In general, one RNC is used for the connection between the terminal 100 and the core network 300. However, when the terminal 100 moves to an area in which another RNC is in charge due to the movement of the terminal 100, the terminal 100 It is connected to the SRNC via the RNC of the moved area. As such, all RNCs that the terminal passes through except the SRNC are called DRNCs (DRNCs), and the DRNCs merely perform a partial function of routing user data or allocating a code that is a common resource. From the terminal's point of view, the division of SRNC and DRNC is logical. On the other hand, according to the dependent relationship between the RNC 12; 14 and the Node Bs 11a to 11b; 13a to 13b in the UTRAN 200, from the viewpoint of the Node Bs 11a to 11b; 13a to 13b. The RNC responsible for managing a specific Node B is called a CRNC, and the CRNC performs traffic load control in a cell managed by the CRNC, congestion control, and admission control for a new radio link established in these cells. do. In the structure of the UTRAN 200, each Node B (11a-11b; 13a-13b) has only one CRNC.

The UTRAN 200 configures, maintains, and manages a radio access bearer (hereinafter referred to as RAB) for communication between the terminal 100 and the core network 300. The core network 300 applies an end-to-end quality of service (hereinafter, referred to as QoS) requirement to the RAB, and the RAB is a QoS set by the core network 300. Support the requirements. Thus, the UTRAN 200 can meet end-to-end QoS requirements by configuring, maintaining, and managing the RAB.

The RAB service is further divided into a ui bearer service and a radio bearer service. The lu carrier service performs reliable transmission of user data between the UTRAN 200 and the edge node of the core network 300. The wireless carrier service performs reliable transmission of user data between the terminal 100 and the UTRAN 200.

Meanwhile, a service provided to a specific terminal may be divided into a circuit switched service and a packet switched service. For example, a general voice telephone service belongs to the circuit switched service, and a web browsing service through an internet connection is classified as the packet switched service. In a communication system supporting the circuit switched service, the RNC 12; 14 is connected to a mobile switching center (MSC) 20 of the core network 300, and the MSC 20 is requested from an external network or And a gateway mobile switching center (GMSC) 30 that manages connection of calls of a voice type requested to the external network. In the communication system supporting the packet switching service, the RNC 12; 14 is a Serving General Packet Radio Service (SGSN) Support Node (SGSN) 40 of the core network 300 (hereinafter referred to as SGSN) 40 and Gateway GPRS (GGSN). Support Node (hereinafter referred to as GGSN) 50. The GGSN 50 performs a function of a gateway for interworking with the Internet or an external packet network. The SGSN 40 is connected to the GGSN 20 to manage mobility of the mobile terminal and performs a packet switch function.

On the other hand, there is an interface (interface) between the plurality of network components that can exchange information for communication with each other. The interface between the RNC 12 and the core network 300 is defined as an lu interface. Where the Iu interface is connected with the components of the packet switched area, it is called Iu-PS, and where the Iu interface is connected with the component of the circuit switched area, it is defined as Iu-CS.

2 is a diagram illustrating the structure of a radio interface protocol between a terminal and a UTRAN based on the 3GPP radio access network standard.

Referring to FIG. 2, the air interface protocol consists of a physical layer (PHY), a data link layer, and a network layer horizontally. The air interface protocol is vertically divided into a user plane for providing data information and a control plane for providing a control signal. The user plane is an area for providing traffic information of the user, such as voice or IP (Internet Protocol). The control plane is an area for providing control information for network interface or call maintenance and management.

The protocol layers of FIG. 2 are based on the lower three layers of the Open System Interconnection (OSI) reference model, which are well known in telecommunications systems, based on L1 (first layer), L2 (second layer), and L3 (first layer). Three layers).

The L1 layer provides an information transfer service to an upper layer by using various wireless transmission technologies. The L1 layer is connected to a medium access control (MAC) layer of a higher layer through a transport channel. Data is transferred between the MAC layer and the physical layer through the transport channel.

The MAC layer provides a reassignment service of MAC parameters for allocation and reallocation of radio resources. The MAC layer is connected to a radio link control (RLC) layer of a higher layer through a logical channel. There are several types of logical channels depending on the type of data information carried between the MAC layer and the RLC layer.

A control channel is used to transmit the information of the control plane, and a traffic channel is used to transmit the information of the user plane.

The MAC layer is divided into a MAC-b sublayer, a MAC-d sublayer, and a MAC-c / sh sublayer according to the type of a transport channel managed. The MAC-b sublayer manages a broadcast channel (hereinafter referred to as BCH), which is a transport channel for broadcasting system information. The MAC-c / sh sublayer manages a common transport channel such as a forward access channel (FACH) or a downlink shared channel (DSCH) shared with other terminals. Controlling RNC (CRNC) in UTRAN includes the MAC-c / sh sublayer. Since the MAC-c / sh layer manages channels shared by all terminals in a cell, there is one for each cell. Each terminal includes one MAC-c / sh sublayer. The MAC-d sublayer manages a dedicated channel (hereinafter referred to as DCH), which is a dedicated transport channel for a specific terminal. A Serving Radio Network Controller (SRNC) includes the MAC-d sublayer of the UTRAN. Each terminal also includes one MAC-d sublayer.

The RLC layer supports reliable data transmission, and segments and concatenates RLC service data units (hereinafter, referred to as SDUs) delivered from an upper layer. The RLCSDU delivered from the upper layer is divided into RLC data units that can be processed in the RLC layer, and header information is added to the divided RLC data units to provide a protocol data unit (hereinafter, referred to as Protocol Data Unit). In the form of PDU). The RLC layer includes an RLC buffer for storing RLC SDUs or RLC PDUs delivered from an upper layer.

The Broadcast / Multicast Control layer (hereinafter abbreviated as BMC) layer is a user equipment (UE) for transmitting a Cell Broadcast Message (abbreviated as CB message) transmitted from the core network. Terminals) and delivers the cell broadcast message to corresponding UEs located in specific cell (s) based on the scheduling result. The CB message delivered from the upper layer in the UTRAN is generated as a BMC message by adding header information such as a message ID, a serial number, and a coding scheme. This BMC message is then delivered to the RLC layer. The RLC layer adds RLC header information to the BMC message and delivers the RLC header information to the MAC layer through a logical channel common traffic channel (CTCH). The logical channel CTCH is mapped to a transport channel forward access channel (FACH) and a physical channel secondary common control physical channel (S-CCPCH).

The radio resource control (hereinafter referred to as RRC) layer located at the bottom of L3 is defined only in the control plane. It is responsible for the control of transport channels and physical channels in connection with the setup, reconfiguration and release of radio bearers (abbreviated as RBs). In this case, RB means a service provided by the second layer for data transmission between the UE and the UTRAN. The establishment of the RB means a process of defining characteristics of a protocol layer and a channel necessary to provide a specific service, and setting each specific parameter and operation method.

For reference, the RLC layer may belong to a user plane or a control plane according to a layer connected to an upper layer. In case of belonging to the control plane, it corresponds to a case of receiving data from a radio resource control (hereinafter, referred to as RRC) layer. Otherwise, the control plane corresponds to a user plane.

In addition, as shown in FIG. 2, in the case of the RLC layer and the PDCP layer, several entities may exist in one layer. This is because one terminal has several radio carriers, and typically only one RLC entity and PDCP entity is used for each radio carrier.

Meanwhile, channels for exchanging data are defined and used between the terminal and the UTRAN. The physical layer of the terminal and the UTRAN exchanges data using a physical channel. In addition, in the radio access section of UMTS, data transmission paths between protocol layers in addition to physical channels are defined and used as a transport channel and a logical channel. The logical channel is provided between the RLC layer and the MAC layer, the transport channel is provided for the exchange of data between the MAC layer and the physical layer, the mapping between the transport channel in the MAC layer, the transport channel and physical in the physical channel Mapping is done between channels.

Hereinafter, a multimedia broadcasting and / or a multicast service (hereinafter, abbreviated as MBMS) will be described. The cell broadcast service provided by the existing BMC layer (hereinafter abbreviated as CBS) does not support the multicast function, and can transmit only short messages up to 1230 octets in size, thus providing a limitation in providing a multimedia service. have. For this reason, a new service called MBMS has been proposed.

The MBMS is a service that simultaneously delivers multimedia data such as audio, pictures, and video to a plurality of terminals using a unidirectional point-to-multipoint bearer service.

The MBMS is divided into a broadcast mode and a multicast mode. The MBMS broadcast mode is a service for transmitting multimedia data to all terminals in a broadcast area. The broadcast area refers to an area where a broadcast service is available. MBMS multicast mode, on the other hand, is a service for transmitting multimedia data only to a specific group of terminals in a multicast area. The multicast zone refers to an area where a multicast service is available.

Terminals to be provided with the MBMS service receive a service announcement message provided by the network. The service guide message is an act of notifying a corresponding terminal of a list of services to be provided and related information in the future. In addition, the terminal to receive the MBMS service should receive a service notification (Service Notification) message provided by the network. The service notification message refers to an act of notifying the terminal of information on broadcast data to be transmitted. Terminals that want to receive the MBMS service in the multicast mode must subscribe to a multicast subscription group. The subscription indicates an action of establishing a relationship between a service provider and a terminal. The multicast subscription group refers to a group of terminals that have undergone the subscription procedure. Terminals subscribed to the multicast subscription group may join a multicast group to receive a specific multicast service. The multicast group indicates a terminal group that receives a specific multicast service. Participation refers to the act of joining a multicast group gathered to receive a specific multicast service. In other words, the participating action is called MBMS Multicast Activation. The MBMS multicast activation or participation process allows the user to receive specific multicast data.

The MBMS service for transmitting the multimedia data by broadcasting or multicasting uses a real-time transport protocol (hereinafter referred to as RTP) to transmit a real time packet. The RTP is a protocol made to be suitable for transmitting multimedia data having real-time transmission characteristics such as audio and video over a multicast network or a unicast network. The RTP is proposed for multimedia data of a real-time transmission characteristic required for a multi-party multimedia conference, but does not limit a specific application. In the format of the packet by the RTP, the RTP media type field indicates the type of payload carried on the current RTP packet. That is, the terminal can know whether the RTP packet includes audio data or video data through the RTP media type information. However, RTP itself does not guarantee the quality of service (QoS) for real-time services such as voice services or video services. Real-time data transmission uses the RTCP (RTP Control Protocol) control protocol to maximize the effect. The RTCP monitors data transmission in a multicast network and provides minimal control and identification. The main function of the RTCP is to generate feedback information of status information for distributing data to the same component and elements of the same function in the multicast network, which is flow control and congestion control of other protocols. (congestion control). Specifically, a packet according to RTCP includes state information of a corresponding RTP packet from a data source to a final destination, for example, information about the amount of lost RTP packet when the RTP packet is transmitted. This state information is used to adjust the data size of the RTP packet at the data source and determine a suitable encoding method.

The RTP included in the data source and the RTCP included in the terminal which is the final destination of the packet are protocols made for the wired network and have the following problems when used in the wireless section as they are.

RTCP packets, which do not distinguish packet loss in the wired and wireless sections, monitor the network status by checking the amount of packet loss due to collision in the wired section. However, packet loss in the wireless section is wrongly determined as a collision in the wired section, and considering the situation of the UMTS network, more packet data is lost in the wireless section than packet loss in the wired section. There is a high probability of an error in the data source processing subsequent RTP packets based on the RTCP packets. For example, the data source attempts to reduce the loss of packets based on the RTCP by changing the size and encoding scheme of the RTP packets. Since the loss of packets occurring in the wired section and the wireless section has different causes, the packet size and encoding scheme should be appropriately changed for each of the wired section and the wireless section depending on the cause, but the data source can distinguish them. Since there is no method, the processing and control of real-time packet data in a wired network and / or a wireless network to reduce the occurrence of an error for an RTP packet cannot be performed effectively.

SUMMARY OF THE INVENTION In view of the problems of the prior art mentioned above, an object of the present invention is to provide a method for processing packet data and an apparatus therefor.

Another object of the present invention is to provide a method and apparatus for processing packet data for generating optimal state information for processing control and flow control of packet data.

Another object of the present invention is to provide a method and apparatus for processing packet data for generating optimal state information for processing and flow control of packet data in wired and wireless networks.

It is still another object of the present invention to provide a method and apparatus for processing packet data that is suitable for supporting broadcast and multicast services of real time packet data.

According to an aspect of the present invention for achieving the above object, the packet data processing apparatus is divided into a wired section and a wireless section by separating a first protocol for providing a real-time packet service and a second protocol for controlling the protocol. Operate.

1 is a diagram illustrating a network structure of a general UMTS.

2 is a diagram illustrating the structure of a radio interface protocol between a terminal and a UTRAN based on the 3GPP radio access network standard.

3 is a block diagram showing the configuration of a UMTS network for the flow of real-time protocol packets according to the present invention.

4 is a block diagram for the flow of real-time protocol packets according to the present invention.

Hereinafter, a configuration and an operation according to an exemplary embodiment of the present invention will be described with reference to the accompanying drawings.

3 is a block diagram showing the configuration of a UMTS network for the flow of real-time protocol packets according to the present invention.

4 is a block diagram for the flow of real-time protocol packets according to the present invention.

According to the present invention, during the transmission of the RTP packet from the data source to the destination terminal, the information for determining the reception state such as the number of RTP packets lost by the data source and the delay time during packet transmission is transmitted to the reception state in the wireless section. It does not include, but includes the reception state of the RTP packet to the end of the wired interval, to meet the purpose of generating the original RTP and RTCP. Here, the data source may be referred to as a server or a terminal for providing data.

To this end, as shown in FIGS. 3 and 4, the wired / wireless section separator 80 of the UTRAN 200 distinguishes and manages the wired section and the wireless section, and the UTRAN which is the end of the wired section is a real-time packet. The protocol layer responsible for the service, i.e. Realtime Transport Protocol (RTP) / RTP Control Protocol (RTP), User Datagram Protocol (UDP) layer and Internet protocol (Internet) Protocol (hereinafter referred to as IP) layer is further included.

Referring to FIG. 3, the RTP packet data transmitted from the data source 70 is IP multicasted in an external network and thus components of the core network 300 (eg, GGSN 50, SGSN 40, and router). (60) is transmitted to the RNC 12 in the UTRAN (200). The IP (Internet Protocol) multicast is an extension of IP, and when there are several users who need the same information on the Internet, it means to group the users into a group and send the information. That is, one-to-many communication. By using the IP multicast method, there is an advantage of saving bandwidth and reducing the network load as well as the transmission load. Multicast also has concurrency to provide the same information to many clients at the same time. In order to use the above IP multicast with this advantage, an IP multicast address is required. The IP multicast address is required to specify a multicast group, which uses class D ranging from 224.0.0.0 to 239.255.255.255. It also uses the IP multicast routing method. The routing method refers to determining how the data from the origin goes to the destination when the origin providing the data and the destination to receive the data are in different sub-networks. The host that performs the routing is called the router 60. The router 60a periodically checks where each host is located in the subnetwork through communication with neighboring routers, and records and stores them in a routing table. For example, IP multicast means that when components on the network have a tree structure, the subcomponents announce a common specific address to their parent, and RTP sent to that specific address of the parent. A packet is a data transmission method for simultaneously transmitting to all subcomponents of the component according to a routing table of the router. Since it is necessary to simultaneously provide multimedia broadcasting and / or multicast service to a plurality of users, the RTP packet may be delivered to many destinations (for example, a plurality of destinations from the first router 60a) using the IP multimedia method and router. RTP packet data may be simultaneously transmitted to the GGSNs 50a to 50n.

When RTP packet data is provided from the core network 300 to the UTRAN 200, the wired / wireless section separator 80 in the UTRAN 200 receives the RTP packet on a wired section. The wired / wireless segmentation device 80 may be configured to be connected to each of the RNCs 12a to 12n or to each of the RNCs 12a to 12n.

The wire / wireless section separator 80 includes the reception status information of the received RTP packet in the RTCP packet and feeds it back to the data source 70 of the external network through a wired section. Accordingly, the data source 70 determines the coding scheme, size and amount of the next RTP packet based on the state information of the RTP packet included in the RTCP packet. The wired / wireless section separator 80 transmits the received RTP packet to a plurality of terminals 100 included in the corresponding RNC 12 over a wireless section. The RTP packet transmitted from the wired / wireless section separator 80 to the plurality of terminals 100 through a wireless section is broadcasted and / or multicasted through a downlink common radio channel or a downlink dedicated radio channel and transmitted. do. Each terminal 100 generates the reception status information of the data such as the number of lost RTP packets and the transmission delay time of the RTP packets generated while the received RTP packets are transmitted on the radio section, and the received RTP packets Included in the feedback to the wire / wireless section separator 80 over the air. The wired / wireless section separator 80 controls the transmission of the RTP packet transmitted to each terminal 100 on the wireless section based on the reception status information of the RTCP packet transmitted from each terminal 100 on the wireless section. That is, the wire / wireless segmentation apparatus 80 determines the coding scheme, size, and amount of the next RTP packet based on the reception state information of the RTP packet included in the RTCP packet transmitted from each terminal 100 in the wireless section. do. In addition, the wire / wireless section separator 80 feeds back an RTCP packet transmitted from each terminal 100 on a wireless section to the data source 70 on a wired section.

Referring to FIG. 4, the wire / wireless segmentation apparatus 80 is located in the UTRAN 200, and its logical position is located above the radio access network protocol layer. The UTRAN 200 is a network serving to match a wired section and a wireless section, and a network access protocol and a wireless protocol form a configuration.

In summary, the wired / wireless section separator 80 of the UTRAN 200 divides the transmission section of the RTP packet into a wired section and a wireless section, and divides the RTP packet transmitted from the core network 300 through the wired section. Do it. In addition, the wire / wireless section separator 80 may transmit the RTCP packet to the data source 70 at the end of the wired section, thereby performing the conventional RTP and RTCP operations. In detail, since the RTCP packet is not transmitted from each terminal 100, it is possible to prevent the overuse of radio resources and to count the number of lost packets corresponding to the number of packets lost due to a collision on the Internet, It can work properly for the feedback function of RTCP packets. In addition, the present invention can perform the broadcast and multicast methods more effectively.

In addition, the wired / wireless section separator 80 for distinguishing a wired section and a wireless section broadcasts and / or multi-casts an RTP packet received from the data source 70 to a plurality of terminals 100 through a downlink wireless channel. After transmitting the RTP packet, the terminals 100 transmit and receive reception state information about the received RTP packet in a reverse direction in a wired / wireless section discrimination apparatus 80 located in the UTRAN 200 through a wireless section. To send. As described above, the reception status information on the RTP packet in the wireless section allows the wired / wireless section separator 80 to control the transmission of the wireless section based on the status information of the RTCP packet. In addition, the present invention described herein may be applied to other systems in a system using the same protocol other than the UMTS system not specifically described herein.

In the present invention, when transmitting a real-time data packet using RTP and RTCP made for a wired network, an RTCP packet generated for control of the RTP packet is generated at each wired / wireless end. That is, at the end of the wired section, the RTCP packet including the reception status information of the RTP packet received through the wired section is transmitted to the source of data through the wired section, and then the data source is transmitted in transmitting the RTP packet. It can make proper encoding, control the exact amount of data transmission, and control the network more effectively by accurately grasp the situation of wired network.

Also, in the wireless section, only the wireless section is managed and controlled separately, so that the amount of data transmission can be adjusted by the wireless section itself to be suitable for the wireless situation.

By separating the wired section and the wireless section, it is possible to accurately determine whether the loss of the real-time data packet occurred in the wired section or the wireless section, and packet transmission delay information in the wired section and the wireless section.

In addition, when broadcasting and / or multicasting real-time packets to the terminal in the MBMS service,

It can provide effective services.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the spirit of the present invention.

Therefore, the technical scope of the present invention should not be limited to the contents described in the examples, but should be defined by the claims.

Claims (26)

And a first protocol for providing a real-time packet service and a second protocol for controlling the protocol into a wired section and a wireless section. The method of claim 1 The first protocol is a real time transport protocol (RTP) and the second protocol is a packet data processing apparatus, characterized in that the RTCP (RTP control protocol) The method of claim 2, The first protocol is a packet data processing apparatus for receiving the RTP packet including the real-time packet data from a data source over a wired interval, and supports to transmit the received RTP packet over a wireless interval. The method of claim 3 The second protocol is a packet data processing apparatus, characterized in that for supporting the feedback to the data source through the wired interval by including the reception status information for the RTP packets received through the wired interval in the RTCP packet. The apparatus of claim 3, wherein the RTP packets transmitted through the radio section are transmitted using a downlink-oriented radio channel. 4. The apparatus of claim 3, wherein an RTCP packet including reception state information of RTP packets transmitted through the wireless section is received from the terminal through the wireless section. The apparatus of claim 6, wherein the wireless section transmission of the RTP packet to the RTP packet received through the wired section is controlled using the reception state information. The apparatus of claim 6, wherein the reception state information is transmitted to the data source through the wired interval. The method of claim 1, The packet data processing apparatus is located at the end of the wired section. The method of claim 1, The apparatus may further include a user datagram protocol (UDP) and an internet protocol (IP) protocol processing device as a lower protocol of the first protocol and the second protocol for transmitting and receiving packet data according to the first protocol and the second protocol. Packet data processing device. 2. The apparatus of claim 1, wherein the real time packet service is a broadcast and multicast service. A data source for generating first packet data according to a first protocol for providing a real time packet service and transmitting the first packet data on a wired interval; A communication operating apparatus for generating first reception state information of first packet data transmitted from the data source based on a second protocol controlling the first protocol, and feeding back the first reception state information to the data source; And a terminal for receiving the first packet data from the communication operating device on a wireless section and generating second reception state information of the received first packet data and feeding back to the communication operating device. Communication system. 13. The method of claim 12, wherein the data source is And determine a processing method of the first packet data based on the first reception state information. The method of claim 13, wherein the data source is And determine the size, amount, and coding scheme of the first packet data based on the first reception state information. The apparatus of claim 12, wherein the communication operating device, And a method of processing first packet data transmitted to the terminal based on the second reception state information. The apparatus of claim 15, wherein the communication operating device comprises: And determine the size, amount, and coding scheme of the first packet data transmitted to the terminal based on the second reception state information. The apparatus of claim 12, wherein the communication operating device, A communication system, characterized in that located at the end of the wired section. 18. The communication system according to claim 17, wherein the end of the wired section is a wireless access network. The apparatus of claim 11, wherein the communication operating device comprises: And a user datagram protocol and internet protocol processing devices. Generating first packet data according to a first protocol and receiving the same on a wired interval; Generating and feeding back first reception state information of the first packet data transmitted on the wired interval based on a second protocol; Transmitting the first packet data over a wireless interval; And generating and feeding back second reception state information of the first packet data received on the radio section. The method of claim 20, And determining a processing method of the first packet data transmitted on the wired interval based on the first reception state information. 22. The method of claim 21, wherein the size, amount adjustment, and coding scheme of the first packet data transmitted on the wired interval is determined based on the first reception state information. The method of claim 20, And determining a processing method of the first packet data transmitted on the wireless section based on the second reception state information. The method of claim 23, And determining the size, amount, and coding scheme of the first packet data transmitted on the wireless interval based on the second reception state information. The method of claim 20, And the real time packet service is a broadcast and multicast service. In the communication device located at the end of the wired section of the mobile communication system, Receiving a real time transport protocol (RTP) packet from a data source and transmitting the real time transport protocol (RTP) packet to a terminal; And feeding back a real-time transmission control protocol (RTCP) packet including a reception state to the data source during the wired interval for the real-time transmission protocol packet.