KR100876500B1 - WiBro channel allocation method for real time broadcasting service - Google Patents

Abstract

The present invention relates to a WiBro channel allocation method for a real-time broadcasting service, and to provide a real-time WiBro broadcast service between a WiBro (Wireless Broadband) base station and at least one user terminal in a wireless communication system environment. In the channel allocation method, each user terminal registers a multicast service with the WiBro base station by using a UDP / TCP (User Datagram Protocol / Transmission Control Protocol) packet having a destination port number (and an IP packet having a multicast destination address). And transmitting the message for the WiBro base station, receiving the UDP / TCP packet (and the multicast IP packet) transmitted from each user terminal and analyzing the lower 8 bits of the destination port number (or the destination multi of the IP packet). Extracting information corresponding to the lower 8 bits of the cast address; The base station transmits information corresponding to the lower 8 bits of the extracted destination port number (or IP destination multicast address) in the multicast connection identifier (Media Access Control, hereinafter referred to as 'MAC') header part (Connection). By mapping to the lower 8 bits of the ID, CID) to the corresponding user terminal, there is an effect that can efficiently provide a bandwidth for the real-time WiBro broadcast service.

Description

WiBro channel allocation method for real-time broadcasting service {WIBRO CHANNEL ALLOCATION METHOD FOR REALTIME BROADCASTING SERVICES}

1 is a conceptual diagram illustrating a WiBro channel allocation method for a real-time broadcasting service according to an embodiment of the present invention.

2 is a flowchart illustrating a method for allocating a WiBro channel for a real-time broadcasting service according to an embodiment of the present invention.

3 is a conceptual diagram illustrating a WiBro channel allocation method for a real-time broadcasting service in detail using a destination port number of a UDP / TCP packet according to an embodiment of the present invention.

4 is a conceptual diagram illustrating a method for allocating a WiBro channel for a real-time broadcasting service using a destination address of an IP packet according to an embodiment of the present invention.

The present invention relates to a WiBro channel allocation method for a real-time broadcasting service, and more particularly, a destination port number of a UDP / TCP (User Datagram Protocol / Transmission Control Protocol) packet or a destination of an IP packet. The present invention relates to a channel allocation method for providing a real-time WiBro broadcast service between a WiBro base station and a user terminal using an address.

That is, the present invention relates to a WiBro channel allocation method for a real-time broadcasting service, and mapping between a WiBro channel and a broadcast service channel, that is, mapping a WiBro multicast connection identifier (Multicast CID) to a corresponding broadcast service and assigning the same to a corresponding user terminal. It is about how to.

In general, a solution for providing a broadcast service in a wireless environment is a concept of a multicast broadcast service (hereinafter, referred to as 'MBS') of WiBro network for the purpose of high-speed multimedia data transmission. It is based on IP (Internet Protocol) multicast.

This has the advantage of increasing the efficiency of resources by allowing multiple users to receive the same multimedia data by sharing resources required for transmission to each user when a certain level of users exists in the same cell. have.

When each user terminal requests MBS service using a Dynamic Service Addition (DSA) message to a base station (BS), each user terminal sends a multicast address and a port number to the base station (BS). (Port Number)

At this time, the BS performs a multicast address, a port number, a connection identifier (CID), an SFID (service flow ID), and an MBZ_ZONE (MBS Zone identifier used to indicate a region in which CIDs for multicast and broadcast flows are valid. The connection with each user terminal is managed using parameters such as). This process must be repeated each time a user terminal attempts a new connection or requests a service.

However, it is best not to change the channel (eg, CID) between the base station BS and each user terminal, and the procedure should be simple if the situation should be changed. This is because, for example, retrieving an IP address from a router depends on the speed and the size of the database, thus reducing performance.

Therefore, when a new connection and change for various broadcasting services such as free, pay per view, download type, etc. are needed, a method of allocating a channel through simple parameter binding is needed.

The present invention has been made to solve the above-described problems, an object of the present invention is to provide a real-time broadcast service by mapping the connection management method between the base station and the user terminal of the WiBro appropriately for channel allocation for broadcasting. The purpose of the present invention is to provide a WiBro channel allocation method for a real-time broadcasting service.

Another object of the present invention is to provide a method for allocating a real-time broadcast service channel classified in consideration of performance and speed using a destination port number of a UDP / TCP packet or a multicast destination address of an IP packet.

In order to achieve the above object, a first aspect of the present invention provides a channel allocation method for providing a real-time WiBro broadcast service between a WiBro base station and at least one user terminal in a wireless communication system environment, the method comprising: Transmitting, by the user terminal, a message for registering a multicast service to the WiBro base station using a UDP / TCP packet having a destination port number; (b) receiving, by the WiBro base station, UDP / TCP packets transmitted from each user terminal and extracting information corresponding to the lower 8 bits of the destination port number; And (c) mapping, by the WiBro base station, information corresponding to the lower 8 bits of the extracted destination port number to the lower 8 bits of the multicast connection identifier (CID) in the MAC header unit and assigning the corresponding information to the corresponding user terminal. It is to provide a WiBro channel allocation method for a real-time broadcasting service, characterized in that.

A second aspect of the present invention provides a channel allocation method for providing a real-time WiBro broadcast service between a WiBro base station and at least one user terminal in a wireless communication system environment, wherein (a ') each user terminal is assigned a destination address. Transmitting a message for registering a multicast service to the WiBro base station using an IP packet having a packet; (b ') receiving, by the WiBro base station, an IP packet transmitted from each user terminal and extracting information corresponding to the lower 8 bits of the destination address; And (c ') mapping, by the WiBro base station, information corresponding to the lower 8 bits of the extracted destination address to the lower 8 bits of the multicast connection identifier (CID) in the MAC header unit and assigning the corresponding information to the corresponding user terminal. It is to provide a WiBro channel allocation method for a real-time broadcasting service, characterized in that.

Here, the IP packet is preferably composed of a Class D Address.

Preferably, the MAC header portion is a two-layer identifier predetermined in the WiBro standard.

Advantageously, said wireless communication system environment is an IEEE 802.16 communication system.

A third aspect of the present invention provides a recording medium on which a program for executing the WiBro channel allocation method for the real-time broadcasting service described above is recorded.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, embodiments of the present invention illustrated below may be modified in many different forms, and the scope of the present invention is not limited to the embodiments described below. Embodiment of the present invention is provided to more fully explain the present invention to those skilled in the art.

First, MBS for multicast broadcasting in the Institute of Electrical and Electronics Engineers (IEEE) 802.16 standard is divided into a single-base station access method and a multi-base station access method. It is similar to the format in which one sender sends data to multiple receivers. In order to interwork with the existing IP multicast service, a source-specific multicast technique and a technique for mapping an MBS are required.

The connection identifier (CID) as a use for connection management in the IEEE 802.16 standard refers to an identifier (ID) assigned by a base station (BS) to a service flow having a non-null AdmittedQoSParamSet or ActiveQoSParamSet. do.

Single-BS-MBS (Single-BS-MBS) is a way to provide a MBS using one base station (BS), using a connection identifier (CID) for identification of the service, this connection identifier (CID) is It is received at the MAC layer and processed.

Multi-BS-MBS (Multi-BS-MBS) is a method of providing multicast and broadcast services using multiple base stations (BSs), and is successfully registered with a specific multi-station MBS connection. All user terminals can receive encrypted data of multicast and broadcast content transmitted by multiple base stations within a given time.

In a multicast service synchronized between multiple base stations, a user terminal may receive multicast or broadcast transmissions from multiple base stations. Multi-base station MBS connections must use the same Connection Identifier (CID) and must provide the same data in synchronized management between groups of base stations.

Each broadcast service is identified by a multicast CID, which notifies the base station that the user terminal is a customer of a specific multicast service and assigns a multicast CID to receive the multicast service. Should receive

All user traffic is sent over a transport connection, which also applies to service flows that implement connection-less protocols such as IP.

An active Active service flow (identified by SFID) that has resources allocated by the base station but whose parameters are not active, or which has resources performed by the base station, is determined by the transport connection identifier (as assigned by the base station). Mapping to Transport CID).

1 is a general conceptual diagram illustrating a WiBro channel allocation method for a real-time broadcasting service according to an embodiment of the present invention, wherein a channel for a WiBro broadcasting service is a destination port number of a UDP packet or a destination port number; A configuration used in a process in which a transport connection identifier (CID) is assigned to at least one user terminal (eg, a mobile communication terminal such as a mobile phone, a PDA, a notebook computer, etc.) in WiBro using a multicast destination address of an IP packet. It shows the flow of elements and data.

Referring to FIG. 1, when each user terminal registers a broadcast service using, for example, an Internet group management protocol, a base station (BS) may provide information about an IP address and a port number. It can be seen, by mapping the information with the multicast CIDs (Multicast CIDs) to deliver the transport connection information to the user terminal, the channel assignment is made.

Meanwhile, the upper layer components may include, for example, a bridge, a router, and a host, and the downlink classification elements may include, for example, a port number and a class D address. Etc.

2 is a flowchart illustrating a method for allocating a WiBro channel for a real-time broadcasting service according to an embodiment of the present invention, wherein a channel for a WiBro broadcasting service is set to a destination port number of a UDP packet or a multicast destination address of an IP packet. This is the overall flow chart to assign.

Referring to FIG. 2, first, when arriving from higher layer components (eg, a bridge, a router, a host, etc.) (S100), downlink classification elements (eg, from the arrived packet) may be used. , Port number or class D address) is checked (S200).

Next, it is determined whether or not it is a multicast service for real-time broadcasting (S300). In the case of a multicast service, the channel allocation method of the present invention, that is, the lower 8 bits of a port number or a class D address and the IEEE 802.16 standard are used. Channel allocation is performed by mapping the lower 8 bits of the multicast connection identifier (Multicast CID) to the corresponding user terminal (S400).

Meanwhile, as a result of the determination in step S300, in the case of not the multicast service, channel allocation is performed by mapping a packet to a predefined basic connection identifier (Basic CID) and delivering the packet to the corresponding user terminal (S500). .

3 is a conceptual diagram illustrating a WiBro channel allocation method for a real-time broadcasting service in detail using a destination port number of a UDP / TCP packet according to an embodiment of the present invention. For example, FIG. It shows the multicast CID packet format in the MAC header, which is a two-layer identifier defined by the destination port number and the WiBro standard.

Referring to FIG. 3, a channel allocation method using a port number of the present invention is a method using two octets of a destination port address of a UDP / TCP packet, and is defined in a WiBro standard. Mapping with two octets of a multicast CID identifying a transport connection for providing a multicast service allocated in a MAC header, which is an identifier of 2) Technique.

That is, the information corresponding to the lower 8 bits of the 16-bit destination port number is mapped to the lower 8 bits of the multicast CID. The user terminal is assigned with a transport connection identifier (Transport CID) for a broadcast service that the user wants to register.

4 is a conceptual diagram illustrating a method for allocating a WiBro channel for a real-time broadcasting service using a destination address of an IP packet according to an embodiment of the present invention, wherein a multicast IP address corresponding to Class D is provided. Among the lower 16 bits, the upper 8 bits are fixed by FE and the multicast connection identifier in the MAC header, which is the identifier of Layer 2 as defined in WiBro's specification ( Multicast CID) packet format.

Referring to FIG. 4, the channel allocation method using a destination address of an IP packet of the present invention, for example, a Class D multicast address, includes a lower two of four octets of a destination address of an IP packet. Octets are used to map two octets and mappings of a multicast CID to identify a transport connection for providing a multicast service specified by WiBro. ) Is a technique.

That is, it shows a channel allocation method using the above Class D address, and the information corresponding to the lower 8 bits of the Class D address whose lower 16 bits start with FE is indicated. A transport connection identifier (Transport CID) for a broadcast service that each user terminal wants to register by mapping to the lower 8 bits of the multicast connection identifiers (Multicast CIDs). Will be assigned.

On the other hand, the WiBro channel allocation method for the real-time broadcasting service according to an embodiment of the present invention can also be implemented as computer-readable code on a computer-readable recording medium. The computer-readable recording medium includes all kinds of recording devices in which data that can be read by a computer system is stored.

For example, the computer-readable recording medium may be a ROM, a RAM, a CD-ROM, a magnetic tape, a hard disk, a floppy disk, a removable storage device, a nonvolatile memory (Flash memory). Optical data storage, and the like, and also implemented in the form of a carrier wave (eg, transmission over the Internet).

The computer readable recording medium can also be distributed over computer systems connected over a computer network so that the computer readable code is stored and executed in a distributed fashion.

Although a preferred embodiment of the WiBro channel allocation method for a real-time broadcast service according to the present invention has been described above, the present invention is not limited thereto, and the scope of the claims and the detailed description of the invention and the accompanying drawings are various. It is possible to carry out the transformation to this also belongs to the present invention.

According to the WiBro channel allocation method for the real-time broadcasting service of the present invention as described above, the destination port number of the UDP / TCP (User Datagram Protocol / Transmission Control Protocol) packet or the destination address of the IP packet By allocating a channel for providing a real-time WiBro broadcast service between a WiBro base station and a user terminal by using the HWB, the bandwidth for the real-time WiBro broadcast service can be effectively provided.

Claims (6)

A channel allocation method for providing a real-time WiBro broadcast service between a WiBro base station and at least one user terminal in a wireless communication system environment, (a) each user terminal transmitting a message for registering a multicast service to the WiBro base station using a UDP / TCP packet having a destination port number; (b) receiving, by the WiBro base station, UDP / TCP packets transmitted from each user terminal and extracting information corresponding to the lower 8 bits of the destination port number; And (c) the WiBro base station mapping the information corresponding to the lower 8 bits of the extracted destination port number to the lower 8 bits of the multicast connection identifier (CID) in the MAC header part and assigning the corresponding information to the corresponding user terminal. WiBro channel allocation method for a real-time broadcasting service, characterized in that. A channel allocation method for providing a real-time WiBro broadcast service between a WiBro base station and at least one user terminal in a wireless communication system environment, (a ') each user terminal transmitting a message for registering a multicast service to the WiBro base station using an IP packet having a destination address; (b ') receiving, by the WiBro base station, an IP packet transmitted from each user terminal and analyzing the extracted IP packet to extract information corresponding to the lower 8 bits of the destination address; And (c ') mapping the information corresponding to the lower 8 bits of the extracted destination address to the lower 8 bits of the multicast connection identifier (CID) in the MAC header unit and assigning the corresponding information to the corresponding user terminal; WiBro channel allocation method for a real-time broadcasting service, characterized in that. The method of claim 2, wherein the IP packet comprises a Class D Address. The method of claim 1 or 2, wherein the MAC header unit is an identifier of two layers defined in advance in the WiBro standard. The method of claim 1 or 2, wherein the wireless communication system environment is an IEEE 802.16 communication system. A computer-readable recording medium having recorded thereon a program capable of executing the method of any one of claims 1 to 3.

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