KR100612672B1 - Method for Transmission of Packet Data Using Short Data Burst Indicator in Wireless Internet Service - Google Patents

Abstract

A packet data transmission method using a short data burst identifier in a wireless data service is provided.

According to the present invention, the packet data service node generates packet data as a GRE packet, but the short data burst identifier field is included in the GRE packet, and the packet controller receiving the GRE packet checks the short data burst identifier field according to the identifier. The transmission method of the packet data is determined and transmitted to the mobile communication terminal.

According to the present invention, it is possible to efficiently use radio resources, and in the case of short burst messages, it is possible to shorten the data transmission time.

Wireless Data, SDB, GRE Headers

Description

Method for transmission of packet data using short data burst identifier in wireless data service {Method for Transmission of Packet Data Using Short Data Burst Indicator in Wireless Internet Service}

1 is a diagram showing an example of a configuration of a mobile communication system to which the present invention is applied;

FIG. 2 is a diagram for explaining the configuration of a user plane data protocol stack between a packet data service node and a packet controller shown in FIG. 1;

3 is a view for explaining the configuration of a general GRE header,

4 is a view for explaining the configuration of a GRE header used for packet data transmission using a short data burst according to the present invention.

<Description of the 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

The present invention relates to a packet data transmission method in a wireless data service, and more particularly, to a packet data transmission method using a short data burst identifier.

The wireless Internet backbone network establishes a packet network in an existing mobile telephone network to provide a wireless data service including wireless internet to mobile mobile communication terminals. The packet network is composed of a packet data service node for setting the environment for providing a data service and a packet transmission network for packet transmission between the data network. The packet network for providing wireless data service can be divided into UMTS standardized by 3GPP, a European-based standardization organization, and CDMA2000 standardized by 3GPP2, a North American-based standardization organization.

CDMA2000 1x is an evolution of the second generation of services, offering improved data rates and a variety of services. In particular, the packet data can be transmitted at a speed of 144Kbps, and it supports the dormant state to efficiently use the traffic channel of the radio section. In addition, CDMA2000 1x has been improved to CDMA2000 1x EV-DO and CDMA2000 1x EV-DV to provide improved data services.

In such a wireless Internet service, if data needs to be transmitted from the packet data service node to the mobile terminal while the packet data session is in a dormant state, the packet data session is reactivated to transmit data or short data bursts. Burst (SDB) can be transmitted. Here, the SDB means a small amount of data bursting in the dormant state in which all dedicated channels are released between the mobile communication terminal and the mobile communication system and only common channels exist, and the SDB message is a dedicated physical channel or a common physical channel. Can be transmitted on the channel.

In the situation where the mobile terminal is in the dormant state, how to transmit data is determined by the packet controller according to a self-determining algorithm such as the packet size or the buffer usage. It is impossible to determine whether the data transmission method is the best SDB utilization method because the node below the packet controller does not know whether the data is to be transmitted or whether the large packet data continues to be transmitted after the first packet data. Can't.

In other words, if the packet is simply data requiring only a response from the mobile communication terminal, it is preferable to transmit the packet data to the SDB without setting a traffic channel. The channel must be set up to transmit data. However, since the packet controller does not know the attributes of the packet data transmitted from the packet data service node, when it is necessary to transmit data from the packet data service node to the mobile communication terminal in the dormant state, the packet is unconditionally reactivated and the traffic channel. There is a disadvantage in that radio resources are unnecessarily used as data is transmitted by setting the.

On the other hand, since the packet data service node handles packets of the IP layer, it has more information than nodes below the packet controller. Therefore, if the packet data service node decides whether to transmit the SDB using its algorithm and informs the packet controller, it is expected that the packet data service node can utilize the resource more effectively in the wireless data transmission.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned disadvantages, and includes an identifier indicating whether or not to transmit data from a packet data service node to a packet controller according to an attribute of the packet data to the SDB. There is a technical problem of maximizing the utilization of the SDB and preventing unnecessary radio resources from being wasted by checking the identifier and transmitting the data to the SDB or through the traffic channel.

The present invention for achieving the above-described technical problem is connected between a packet controller for performing a wireless section communication for providing a packet data service to the mobile communication terminal, the packet controller and the IP network and the mobile communication terminal through the packet controller A mobile communication system comprising a packet data service node operating as a network access server for providing a packet data service, the method for transmitting packet data from the packet data service node to the mobile communication terminal, the packet data service. Generating, at the node, the packet data into a GRE packet, such that the short data burst identifier field is included in the GRE packet; And the packet controller receiving the GRE packet checks the short data burst identifier field, determines a transmission method of the packet data with reference to the identifier, and transmits the packet data to the mobile communication terminal.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a diagram illustrating an example of a mobile communication system to which the present invention is applied.

As shown, the mobile communication system for providing a wireless Internet service to the mobile communication terminal 10 controls the base station (BTS, 20) performing wireless section communication with the mobile communication terminal 10, a plurality of base stations and voice A base station controller (BSC) 22 that supports communication and data communication and performs a function of connecting a mobile communication system and a mobile communication terminal, and an exchanger connected to one or more base station controllers 22 to perform a call exchange (MSC) 24 ), A type of database that stores personal information, location information, additional service information, etc. of a user of the mobile communication terminal 10, and interacts with an exchange 24 and a visitor location register (not shown) to process and add voice calls. The home location register (HLR) 26 performs functions such as user authentication related to the service and controls the service.

In addition, the mobile communication system according to the present invention operates as a base station controller for providing a packet data service, thereby providing a packet controller (PCF) 28 for exchanging control signals and traffic information for the packet data service, and an IP through a gateway. A packet data service node (PDSN) 30 connected to the network 36 and operating as a network access server that provides packet data services to the mobile communication terminal 10 through the packet controller 28, user authentication, authority and billing information. Authentication apparatus (AAA) 32 performing the collection function, and a home agent (HA) 34 for managing the mobility of the mobile communication terminal (10).

In the above, 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 a 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 is a diagram for describing a configuration of a user plane data protocol stack between a packet data service node and a packet controller shown in FIG. 1.

As shown, the packet data service node 30 has a protocol stack for communicating with the IP network 36 and a protocol stack for communicating with the packet controller 28. In both cases, coding, modulation, etc. It has a link layer for performing functions such as error correction, flow control, synchronization, etc. for accurate physical message transmission and message transmission. 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 such a protocol stack structure, the packet data service node 30 encapsulates user data packets with GRE and sends them to the packet controller 28. In the GRE standard included in the Requests For Command (RFC) 1701 and RFC 2784 of the IETF, the GRE header is defined as shown in FIG. 3.

3 is a diagram for explaining a configuration of a general GRE header.

As shown, the GRE header contains a two-byte flag field, a protocol type field, a checksum field used to determine the accuracy of the data, an offset field indicating the data length, and an angle within the tunnel. A key field used to identify traffic, a sequence number field indicating the order of packet data, a routing field indicating a data transmission path, and the like may be additionally included.

Looking specifically at the flag field consisting of 2 bytes, the 0th bit to the 4th bit of the first byte are defined (C (Checksum), R (Reserved), K (Key Present), S (Sequence Number Present), Recur) (Recursion Control, etc.) It is set to an appropriate value according to the type of additionally included field. The 0th to 4th bits of the second byte are unused as reserved bits and must be set to '0' and transmitted. Also, the fifth to seventh bits of the second byte contain version information and are generally set to '0' and transmitted.

As such, five bits of the flag bits of the GRE header are reserved bits. When one of these five bits is selected to be used to indicate the SDB identifier, the mobile communication terminal is transmitted from the packet data service node through the packet controller. This makes it possible to clarify the nature of the data to be transmitted.

4 is a view for explaining the configuration of a GRE header used for packet data transmission using a short data burst according to the present invention.

4 shows a case in which the SDB identifier B is included in any one of the reserved bits (the fourth bit of the second byte) of the flag field included in the GRE header. When the packet data service node decides whether to transmit packet data to the mobile communication terminal to the SDB or through a traffic channel, and transmits the packet data to the SDB, the packet data service node sets the SDB identifier (B) to '1' and transmits it to the traffic channel. In this case, the GDB packet is transmitted to the packet controller by setting the SDB identifier to '0'.

The packet controller refers to the flag field of the GRE packet received from the packet data service node. If the SDB identifier (B) is set to '0', the packet controller reactivates the packet data session to establish a traffic channel and transmits data. If set to '1', the packet data is transmitted as an SDB message.

As such, those skilled in the art will appreciate that the present invention can be implemented in other specific forms without changing the technical spirit or essential features thereof. Therefore, the embodiments described above are to be understood in all respects as illustrative and not restrictive. The scope of the present invention is shown by the following claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention. do.

As described above, according to the present invention, an SDB identifier is included in the GRE header, and when it is necessary to transmit data from the packet data service node to the mobile communication terminal when the mobile communication terminal is in a dormant state, the data type depends on the type of data. By differently setting the SDB identifiers and transmitting them to the packet controller, the packet controller can easily determine whether to use a traffic channel or an SDB message when transmitting data to the mobile communication terminal, thereby efficiently using radio resources and short bursts. In the case of a message, there is an advantage that the data transmission time can be shortened.

Claims (3)

A network access server for providing a packet data service to the mobile communication terminal through the packet controller connected between a packet controller for performing wireless section communication for providing a packet data service to a mobile communication terminal, the packet controller and an IP network. A mobile communication system including a packet data service node operating as a method, the method for transmitting packet data from the packet data service node to the mobile communication terminal, Generating, by the packet data service node, the packet data into a GRE packet, such that a short data burst identifier field is included in the GRE packet; And The packet controller receiving the GRE packet checks the short data burst identifier field, determines the transmission method of the packet data according to the identifier, and transmits the short data burst to the mobile communication terminal. Packet data transmission method using burst identifier. The method of claim 1, The header of the GRE packet has a flag field of 2 bytes and a protocol type field of 2 bytes, the flag field includes 5 bits of reserved bits, The short data burst identifier is a packet data transmission method using a short data burst identifier in a wireless data service, characterized in that for displaying by using any one of the 5-bit reserved bits. The method of claim 1, When the short data burst identifier is 0, the packet controller reactivates a session with the mobile communication terminal, establishes a traffic channel, and transmits the packet data. When the short data burst identifier is 1, the packet data transmission method using the short data burst identifier in the wireless data service, characterized in that for transmitting the packet data to the mobile communication terminal using a control channel.

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