KR20060005287A - The method for identifying a packet and its data transmission by packet data service node - Google Patents

Abstract

The present invention relates to a packet classification and a packet data transmission method of a packet data service node, so that a packet data service node (Packet Service Data Node) delivers a specific packet to a packet controller (PCF) using a short data busrt (SDB). The present invention relates to a method of receiving a short SDB using a paging channel to quickly transmit information to a subscriber who has transitioned to a dormant state by using a request method.

In the packet classification and packet data transmission method of the packet data service node of the present invention, the packet data service node of the mobile communication service generates packet data as a GRE packet including an SDB identifier field, and transmits the packet data to the mobile communication terminal through the packet controller. A method for transmitting, comprising: a first step of determining whether to utilize SDB for packet data to be transmitted by the packet controller service node; A second step of assigning an SDB utilization indicator to the SDB identifier field when the determined result is to utilize the SDB; Transmitting the GRE packet from the packet controller service node to the packet controller; And a fourth step of transmitting the packet data by using the SDB in the packet controller receiving the GRE packet.

Packet, IP header, dormant state, and optional fields

Description

The method for identifying a packet and its data transmission by packet data service node}

1 illustrates a configuration of a conventional mobile communication system.

FIG. 2 illustrates a configuration of a user plane data protocol stack between a packet data service node and a packet controller shown in FIG.

3 shows a GRE header format according to the present invention.

4 shows an IP header format according to the present invention.

FIG. 5 illustrates Options, Code, Length, Data, and Short Data Burst Indicator (SDBI) for FIG. 4 according to the present invention.

<Explanation of symbols for the main parts of the drawings>

10: mobile communication terminal 20: base station

22 base station controller 24 switchboard

26: home location register 28: packet controller

30: packet data service node 32: authentication center

34: home agent 36: IP network

100: Option 200: Code

300: Length 400: Data

500: Copy 600: Class

700: Identification number 800: Reserved

900: B (Short Data Burst Indicator)

1000: 0 1100: 1

The packet classification and packet data transmission method of the packet data service node of the present invention uses a paging channel (paging channel) to a subscriber transitioned to a dormant state to quickly transmit information using SDB (Short Data Burst). The present invention relates to a method for requesting a packet service data node to forward a specific packet using an SDB to a packet controller (PCF) for delivery.

Hereinafter, the configuration and operation of the embodiments of the prior art will be described in detail with reference to the accompanying drawings.

1 illustrates a configuration of a conventional mobile communication system. The mobile communication system for providing a wireless Internet service to the mobile communication terminal 10 controls a base station (BTS, 20) performing wireless section communication with the mobile communication terminal 10, a plurality of base stations, and performs voice communication and data communication. And a base station controller (BSC) 22 for supporting a mobile communication system and a mobile communication terminal, a switch (MSC) 24 for performing a call exchange in connection with one or more base station controllers 22, and a mobile communication terminal. (10) A kind of database that stores user's personal information, location information, additional service information, etc., which interacts with the exchange 24 and a visitor location register (not shown) to authenticate a user for voice call processing and additional services. And a home location register (HLR) 26 that serves to control the services and the like.

In addition, the mobile communication system operates as a base station controller for providing a packet data service, and performs a packet controller (PCF) 28 for exchanging control signals and traffic information for the packet data service, and an IP network 36 through a gateway. A packet data service node (PDSN) 30, which is connected and operates as a network access server that provides packet data service to the mobile communication terminal 10 through the packet controller 28, performs user authentication, authority and billing information collection functions. An authentication device (AAA) 32 and a home agent (HA) 34 for managing the mobility of the mobile communication terminal 10.

The packet controller 28 further performs a buffering function and a state management function of the mobile communication terminal until the packet data transferred from the packet data service node 30 is transmitted wirelessly. The interface for signaling A11 and user traffic A10 between the packet controller 28 and the packet data service node 30 is called an R-P interface. The R-P interface uses the mobile IP protocol for signaling between the packet controller 28 and the packet data service node 30, and uses GRE (Generic Routing Encapsulation) for the transmission of user traffic.

FIG. 2 illustrates a configuration of a user plane data protocol stack between a packet data service node and a packet controller shown in FIG. The packet data service node 30 has a protocol stack for communication with the IP network 36 and a protocol stack for communication with the packet controller 28, and in both cases, a physical layer for coding, modulation, and the like of data. (physical layer) and the link layer (link layer) for performing functions such as error correction, flow control, synchronization for the correct transmission of the message. In addition, the protocol stack for communication with the packet controller 28 further includes an IP layer and a GRE layer specifying the transmission destination of the data.

On the other hand, the packet controller 28 is a MAC (Medium Access) corresponding to the GRE layer from the Air-Link corresponding to the physical layer of the protocol used by the packet data service node 30 and the link layer above the physical layer. A control layer and a link access control (LAC) layer are included, and the MAC layer performs radio resource allocation for data processing, and the LAC layer performs functions such as establishing and maintaining a logical link.

In the protocol stack structure as described above, the packet data service node 30 encapsulates user data packets in a GRE and transmits them to the packet controller 28.

However, the conventional mobile communication system standard as described above defines a method of notifying the packet controller to separate the packets transmitted by the packet data service node 30 using the SDB using its algorithm, or to transmit the divided packets through the SDB. There is a problem that is not.

Accordingly, the present invention is to solve the above problems, the present invention defines a method for the packet data service node to distinguish the packet to be transmitted using the Short Data Busrt (SDB) to deliver a specific packet to the packet controller using the SDB By using a method of requesting the subscriber to transition to the dormant state by using a paging channel using a short SDB can be delivered quickly information.

The packet classification and packet data transmission method of the packet data service node of the present invention uses a paging channel (paging channel) to a subscriber transitioned to a dormant state to quickly transmit information using SDB (Short Data Burst). The present invention relates to a method for requesting a packet service data node to forward a specific packet using an SDB to a packet controller (PCF) for delivery.

In the packet classification and packet data transmission method of the packet data service node of the present invention, the packet data service node of the mobile communication service generates packet data as a GRE packet including a short data burst (hereinafter referred to as SDB) identifier field and moves it through the packet controller. A method for transmitting packet data to a communication terminal, comprising: a first step of determining whether to utilize SDB for packet data to be transmitted by the packet controller service node; A second step of assigning an SDB utilization indicator to the SDB identifier field when the determined result is to utilize the SDB; Transmitting the GRE packet from the packet controller service node to the packet controller; And a fourth step of transmitting the packet data by using the SDB in the packet controller receiving the GRE packet.

Hereinafter, with reference to the accompanying drawings, the configuration and operation of the embodiment of the present invention will be described in detail.

FIG. 3 shows the GRE header format according to the present invention, FIG. 4 shows the IP header format according to the present invention, and FIG. 5 shows the options, code, and length for FIG. 4 according to the present invention. (Length), Data, and Short Data Burst Indicator (SDBI) are shown.

The packet data service node 30 determines whether to transmit the packet to the SDB or the traffic channel, and sets the B bit of the GRE header to “1” if the packet is to be transmitted to the SDB, and sets the B bit to “1” if the packet is to be transmitted to the traffic channel. 0 ”to transmit the GRE packet to the packet controller 28.

The packet data service node may be classified by size and may be classified by using an IP header option field. FIG. 3 is a diagram for describing a method of dividing by the size, and FIGS. 4 and 5 are diagrams for explaining a method of dividing using the IP header option field.

First, the method of dividing by size is as follows. Since SDB is transmitted through a paging channel, the size of information that can be transmitted is very limited. Therefore, service servers that want to use SDB to transmit information should generate packets according to a predefined range and send them to the MS. .

First, the system operator determines the total length of the packet to be processed by the SDB. Next, the packet data service node 30 determines whether or not the data session of the packet to be processed is in a dormant state, and sets the B bit of the GRE header to “1” in the dormant state. Otherwise, set the B bit of the GRE header to “0”. Next, when the session is in a dormant state, it is determined whether a source IP address belongs to a pre-registered network class, and if the session belongs to a pre-registered network class. Set the B bit of the GRE header to "1", otherwise set the B bit of the GRE header to "0". Next, if the source IP address belongs to a registered network class, the total length of the packet is determined. Next, if the total length of the packet falls within a predetermined range of the total length of the packet, the B bit of the GRE header is set to "1", and if not, it is set to "0".

Second, there is a method of distinguishing using the IP header option field. The method is a method for requesting the service server to transmit a specific packet to the SDB. As shown in FIG. 4, the service server may request SDB transmission by adding an option 100 field to an IP header of a packet requesting transmission to the SDB. The option 100 field consists of a code (Code, 200), a length (Length, 300), and a data (Data, 400) field. In addition, the code 200 field includes a copy 500, a class 600, and a unique number 700 field. The length 300 has a value of 3, and the data 400 includes a reserved 800 and a B bit 900, and the B bit has a value of "0" or "1". If the value of "0" has a traffic channel transmission, the value of "1" has a SDB transmission.

First, the system operator determines the value of the unique number 700 to be used in the option field of the IP header. The unique number 700 may be used by being assigned an arbitrary value to avoid the value previously registered from the IAAA, in the present invention will be used as a code value for SDB classification by setting a random value "11011". Next, the packet data service node 30 determines whether there is an option 100 field, and if there is an option 100 field, sets the B bit of the GRE header to “1” and if there is no option 100 field, the GRE. Set the B bit of the header to "1". Next, if there is an option 100 field, if the unique number 700 of the code 200 of the option 100 field is equal to a preset value, it is determined whether or not the source IP address belongs to a pre-registered network class. If it belongs to the network class registered in advance, it is set as "1". If it is not in the preset network class, it is set as "0". Next, if the source IP address belongs to a pre-registered network class, it is determined whether the B bit 900 of the data 400 field is set to “1” 1100. Next, when the B bit 900 of the data 400 field is set to "1" (1100), the B bit 900 of the GRE header is set to "1" (1100), and the "1" (1100). If not set, the B bit 900 of the GRE header is set to "0" (1000).

It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the technical spirit of the present invention through the above description. Therefore, the technical scope of the present invention should not be limited only to the contents described in the embodiments, but should be defined by the claims.

As described above, the packet classification and packet data transmission method of the packet data service node according to the present invention uses a method of requesting the packet data service node to forward a specific packet to the packet controller 28 using the SDB. Information can be delivered quickly by sending an SDB to a subscriber who has transitioned to using a paging channel.

Claims (7)

A method of transmitting packet data to a mobile communication terminal through a packet controller by generating a packet data in a packet data service node of a mobile communication service as a GRE packet including a short data burst (hereinafter SDB) identifier field, Determining whether to utilize SDB for packet data to be transmitted by the packet controller service node; A second step of assigning an SDB utilization indicator to the SDB identifier field when the determined result is to utilize the SDB; Transmitting the GRE packet from the packet controller service node to the packet controller; And A fourth step of transmitting packet data by using a SDB in a packet controller receiving the GRE packet; Packet classification and packet data transmission method of a packet data service node comprising a. The method according to claim 1, The first step is A first step of determining, by a system operator, the total length of a packet to be processed by the SDB; And When the packet controller service node is within the predetermined range, the B controller sets the B bit of the GRE header to “1” or “0” by determining whether the session is in a dormant state. A second step of doing; Packet classification and packet data transmission method of a packet data service node for determining a specific packet transmission method by dividing by the size, including. The method according to claim 2, When the session is in a dormant state, it is determined whether a source IP address belongs to a pre-registered network class to set the B bit of the GRE header to “1” or “0”. step Packet classification and packet data transmission method of a packet data service node comprising a. The method according to claim 3, A first step of determining a total length of a packet when the source IP address belongs to a pre-registered network class; And Determining whether the total length of the packet is within a predetermined total length of the packet and setting the B bit of the GRE header to “1” or “0”; Packet classification and packet data transmission method of a packet data service node comprising a. The method according to claim 1, The first step is A first step of determining, by a system operator, a unique number to be used in an option field of an IP header; And A second step of the packet controller service node determining whether there is an option field code and setting the B bit of the GRE header to “1” or “0”; And A third step of determining whether the unique number of the option field code is equal to a preset value when the option field exists, and setting the B bit of the GRE header to “1” or “0”; The packet classification and packet data transmission method of the packet data service node for determining a specific packet transmission method using the option field of the IP header, including. The method according to claim 5, If the unique number of the option field code is equal to a preset value, determining whether the source IP address belongs to a pre-registered network class and setting the B bit of the GRE header to “1” or “0” Packet classification and packet data transmission method of a packet data service node comprising a. The method according to claim 6, If the source IP address belongs to a pre-registered network class, determining whether the B bit of the data field is set to “1” and setting the B bit of the GRE header to “1” or “0” Packet classification and packet data transmission method of a packet data service node comprising a.

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