KR20010044936A - Packet data service controlling method in mobile communication system - Google Patents

Abstract

PURPOSE: A packet data service control method of mobile communication system is provided to restart the pack data service by using point-to-point protocol link when moving a terminal to a region of a new controller in hold or dormant state of a terminal. CONSTITUTION: The first terminal sets a corresponding serving base station, an old RNC(Radio Network Controller) and a packet data call in order to receive a radio packet data service. When the old RNC transmits a PDSN(Packet Data Service Node) of the first PDSN as a serving PDSN to the first terminal, the first terminal stores an identifier(PDSN ID) of itself serving PDSN(b1), a radio link protocol(RLP) is set between the first terminal and the old RNC of serving RNC(b2). After setting PPP link with the first PDSN(old PDSN) of serving PDSN, an authentication and an admission of the access and IP(Internet Protocol) from an home agent(HA) are allocated and then connected to the packet network such as Internet etc.(b3). When the terminal moves to a service region of the new RNC in a hold or dormant state and the re-connection origination call is attempted as new RNC, an identifier(PDSN ID) is transmitted to a new base station, the new base station transmits it to the new RNC(b4). When the terminal is in a hold state, the new RNC and a radio link protocol(RLP) are established(b5). The movement of the terminal informed to the mobile station, the connection between the new RNC and serving PDSN is maintained(b6) with reference to serving PDSN ID of the first terminal.

Description

Packet data service controlling method in mobile communication system

The present invention relates to a packet data service of a mobile communication system, and is particularly suitable for resuming packet data service using an initially established point-to-point protocol link when a terminal moves to a new wireless network controller area from a held state or dormant state. It is to provide a packet data service control method of a mobile communication system.

In the IMT-2000 / PCS / cellular mobile communication system, the connection between the Radio Network Controller (RNC) and the Packet Data Service Node (PDSN) among the network components for the wireless packet data servicetm is various. It is configured to interwork with the network.

A packet control function (PCF) may exist in the radio network controller (RNC) to establish a connection between the radio network controller (RNC) and the packet data service node (PDSN). Express this.

One packet control function (PCF) (or RNC) is associated with one packet data service node (PDSN) or several packet data service nodes (PDSN), and one packet data service node (PDSN) It can be linked with the packet control function (PCF).

A terminal and base station system (including a base station (BTS) and a radio network controller (RNC)) have a medium access control (MAC) layer to efficiently perform packet data transfer between the terminal and the base station system. The MAC layer maintains four MAC states between the terminal and the base station system where the packet service is activated according to the existence of data to be transmitted. However, the media delivery control layer does not exist when the packet service is inactivated.

The four media delivery control (MAC) states are as follows.

In the active state, a traffic channel for packet data transmission is allocated between the terminal and the base station system, power control is performed, and the packet transmitted on the traffic channel is RLP (Radio) in the terminal and the base station system. Link Processor).

The control hold state is a state in which a traffic channel is not allocated because there is no data to be transmitted between the terminal and the base station system, but a channel and a control channel for power control are allocated and the RLP is maintained. Therefore, when data to be delivered is generated, a traffic channel is allocated and packet transmission is performed immediately.

The suspended state is a state in which there is no power control and control channel maintained in the control hold state described above, but an RLP and a point to point protocol (PPP) link are maintained between the terminal and the base station system. Therefore, in the suspended state, it is easy to resume packet transmission between the terminal and the base station system because the RLP is maintained when data to be delivered occurs.

The Dormant state is a state in which the radio section connection between the terminal and the base station system is completely released and only the PPP link is maintained between the terminal and the packet data service node (PDGN). Operation between the system and the base station system requires approximately the same amount of time as the initial packet connection.

When the specific terminal activates the packet data service, such a medium transfer control (MAC) state is always consistently maintained until it is generated and deactivated between the terminal and the base station system.

Hereinafter, a packet data service method of a conventional mobile communication system will be described with reference to the accompanying drawings.

1 is a diagram illustrating a general wireless packet data service network (node) configuration.

As shown in FIG. 1, a general wireless packet data service network includes a plurality of first to third terminals 1a, 1b, and 1c, and old and new base stations 2 and 8, respectively. And old and new radio network controllers (RNCs) 3 and 9, old and new packet data service nodes (PDSNs) 6 and 11, mobile switching centers 5 and packet networks Internet 7.

Here, reference numeral 4 denotes an old base station system including an old base station 2 and an old radio network controller 3, and reference numeral 10 denotes a new including a new base station 8 and a new wireless network controller 9. Base station system.

When a voice call is sent from the first terminal 1a in such a general wireless packet data service network, the voice call is transmitted from the first terminal 1a to the old base station 2, the old wireless network controller 3, and the mobile switching center 5 It is set to the path of.

When the packet data call is transmitted from the first terminal 1a, the packet data call is transmitted from the first terminal 1a to the old base station 2, the old radio network controller 3, and the old packet data service node 6 and the Internet ( 7) is set to the path.

In the wireless packet data network, the terminal and the base station system receiving the packet data service do not have a specific dedicated traffic channel between the terminal and the base station system when there are no packets to transmit to each other, and hold only the RLP and PPP links. Maintain a Suspend state or a Dormant state that maintains only a PPP link. At this point, the RLP resides in the radio network controller and the PPP link resides in the packet data service node (PDSN).

2 is a flowchart illustrating a packet data service control method in a conventional wireless packet data service network.

A method of controlling a packet data service in a conventional wireless packet data service network will be described with reference to FIGS. 2 and 1, in which a first terminal (1a) receives a wireless packet data service by a first terminal (1a). When a packet data call is established with the corresponding base station 2 and the old RNC 3 serving as the serving RNC and the serving RNC located in the packet data service area, the first terminal 1a and the old RNC as the serving RNC (). A radio link protocol (RLP) between 3) is established (a1).

After establishing the PPP link with the serving PDSN, the first PDSN (old PDSN), an authentication protocol, an access authorization, and an Internet protocol (IP) are allocated from a home agent (HA). (A2).

Subsequently, when the first terminal 1a performing the radio packet data service moves to the service area of the new RNC 9 in a pending or dormant state, a reconnection origination call is attempted by the new RNC 9. (a3).

At this time, if the first terminal 1a is in the suspended state, a new RNC 9 and a radio link protocol (RLP) are set (a4).

The first terminal 1a, which is then in a held or dormant state, maintains a PPP link with a first PDSN (old PDSN), which is a serving PDSN, via a new RNC 9. At this time, the new RNC 9 polls all PDSNs (first to nth PDSN) in the network whether it is maintaining a PPP link with the first terminal 1a (a5).

At this time, when a response is received from the first PDSN (old PDSN) serving as the serving PDSN to maintain the PPP link with the Internet 7, the new terminal 1 is connected between the new RNC 9 and the first PDSN (old PDSN). To use the previously established PPP link. However, if there is no serving PDSN, a new PDSN 11 and a PPP link are newly reset (a6). At this time, the link establishment between the RNC and the PDSN is called an R-P interface.

The conventional packet data service control method in the wireless packet data service network has the following problems.

First, when a terminal accesses a wireless packet data service or moves from a pending state or dormant state to a new radio network controller (RNC) area (dorm handoff), the radio network controller (RNC) is the PPP link of the terminal. Inquire whether all packet data service nodes (PDSNs) in the network have a packet data service node (PDSN) that has been set up or not, and receive a response. The load between the RNC and the packet data service node (PDSN) is increased, and the PPP link establishment time is delayed.

Secondly, when a user first establishes a PPP link by accessing a new wireless packet data network, the UE first establishes a PPP link with a new packet data service node after confirming that there is no existing PPP link. The problem of PPP link establishment delay is caused.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and uses a point-to-point protocol link that is initially set up when a terminal moves to a new wireless network controller area in a dormant state or dormant state in a mobile communication system. To provide a packet data service control method of a mobile communication system capable of resuming a packet data service.

According to an aspect of the present invention for achieving the above object, the terminal in the inactive state attempts to connect to the arbitrary base station system, the base station system between the terminal and the packet data service node point-to-point Establishing a protocol link, transmitting, by the base station, an identifier (PDSN ID) of the packet data service node to the terminal, storing a packet data service node identifier by a singer terminal, and holding the terminal Moving from the base station system to the other base station system in the state or dormant state and transmitting the packet data service node identifier to the other base station system to maintain the point-to-point protocol link.

According to the present invention as described above, when a terminal of a mobile communication system establishes a wireless packet data call or reconnects, the terminal establishes a point-to-point protocol link between the terminal and the packet data service network by transmitting a corresponding packet data service network (node) identifier to the base station system. This is an easy advantage.

1 is a diagram illustrating a general wireless packet data service network configuration

2 is a flowchart illustrating a packet data service control method in a conventional wireless packet data service network.

3 is a flowchart illustrating a packet data service control method in a wireless packet data service network 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 flowchart illustrating a packet data service control method in a wireless packet data service network (node) according to the present invention.

In the packet data service control method in a wireless packet data service network according to the present invention, a terminal performing a wireless packet data service is activated and maintained in a new radio network controller (new RNC) and an old radio network controller (old RNC). Handoff may occur between terminals, and the terminal cannot perform an active handoff in the hold state and the dormant state, and thus the terminal must transmit a reconnected outgoing call to the base station system.

That is, a method of controlling a packet data service in a wireless packet data service network according to the present invention will be described with reference to FIGS. 3 and 1. First, an inactive state of a first mobile station (MS) 1a is performed. If a packet data call is established with the corresponding serving base station 2 in the packet data service area where the first terminal 1a is located and the old RNC 3 serving RNC in order to receive the service, the first terminal 1a and the serving service are served. ) Since the PPP link between PDSNs is initially established, when the old RNC 3 transmits the PDSN identifier (ID) of the first PDSN (old PDSN) serving as the serving PDSN to the first terminal 1a, the first terminal 1a An identifier (PDSN ID) of its own serving PDSN is stored (b1), and a radio link protocol (RLP) is established between the first terminal 1a and the old RNC 3 serving as serving RNC (b2).

After establishing the PPP link with the serving PDSN, the first PDSN (old PDSN), an authentication protocol, an access authorization, and an Internet protocol (IP) are allocated from a home agent (HA). (B3).

If the first terminal 1a continuously performing the radio packet data service moves to the service area of the new RNC 9 while in a pending or dormant state, a reconnection origination call may be attempted by the new RNC 9. When the first terminal 1a transmits the identifier (PDSN ID) of the stored PDSN to the new base station 8, the new base station 8 transmits it to the new RNC (9) (b4).

At this time, if the first terminal 1a is in the suspended state, a new RNC 9 and a radio link protocol (RLP) are set (b5).

The new RNC 9 notifies the mobile switching center 5 that the first terminal 1a has moved with the serving PDSN ID transmitted from the first terminal 1a, terminates the connection between the old RNC 3 and the serving PDSN. In operation 6, the RNC 9 establishes and maintains a connection between the new RNC 9 and the serving PDSN (first PDSN) with reference to the serving PDSN ID of the first terminal 1a. At this time, the link establishment between the RNC and the PDSN is called an R-P interface. That is, it is possible to match the media transfer control (MAC) status and control information between the new RNC 9 and the first terminal 1a without resetting the PPP link.

On the other hand, when the serving PSDN ID received from the first terminal 1a by the new RNC 9 cannot be interworked with the network, the new RNC 9 notifies the first terminal 1a by assigning a new PDSN ID to the first terminal 1a. And establish a PPP link between the first terminal 1a and match the medium transfer control (MAC) status and control information.

The identifiers (ID) of each of the first to nth PDSNs are each assigned with a unique number and used.

As described above, the present invention enables the terminal to notify and maintain the PDSN identifier (ID) in which the PPP link is established with the terminal when activating the wireless packet data service. By transmitting to the base station system, it is easy to know whether the terminal has set up a previous PPP when establishing a new call, so that a new PDSN can be assigned to quickly set up a PPP link. Since the original PPP link can be used as it is, the PPP link setup time can be shortened.

Claims (2)

Attempting to connect to the base station system by the terminal in an inactive state; Establishing, by the base station system, a point-to-point protocol link between the terminal and the packet data service node; Sending, by the base station, an identifier (PDSN ID) of the packet data service node to the terminal; Storing, by a singer terminal, the packet data service node identifier; And after the terminal moves from any base station system to another base station system in a held state or dormant state, transmits the packet data service node identifier to the other base station system to maintain the point-to-point protocol link. A packet data service control method in a mobile communication system, characterized by the above-mentioned. 2. The method of claim 1, further comprising: reestablishing a point-to-point protocol link with a new packet data service node if the other base station system is unable to interwork with a packet data service node transmitted from the terminal; And transmitting a new PDSN ID of a new packet data service node to the terminal.