KR20030062018A - Method for transmitting wireless data in a mobile communication system - Google Patents

Abstract

PURPOSE: A radio data transmitting method in a mobile communication system is provided to effectively manage an IP(Internet Protocol) pool and reducing consumption of R-P session resource by performing a suitable load balancing according to an increase in a data traffic. CONSTITUTION: A call is transmitted from an MN(Mobile Node)(10) to a PCF(Packet Control Function)(20). The PCF(20) transmits control information(Registration_Request) to a FACN(Foreign Agent Control Node)(30)(110), and accordingly, a session is set up between the MN(10) and the PCF(20). The FACN(30) transmits a message(Configuration_request) requesting information on a call load to PDSN(Packet Data Serving Node)(40,42) for the incoming call(120). The PDSN1(40) and PDSN2(42) provide a reply value including the number of IP addresses remaining in an IP pool to the FACN(30)(130). The FACN(30) makes a load balancing to the PDSN by using information on an allocatable IP pool of the PDSN. The FACN(30) selects a PDSN with less calls and informs the PCF(20) accordingly(140). The PCF(20) receives the PDSN select information from the FACN(30) and requests a PPP(Point-to-Point Protocol) session setup from the corresponding PDSN(40,42)(150). The PDSN(40,42) provides a response to the PPP session setup request(160).A PPP session is established between the PCF(20) and the PDSN(40,42). The MN(10) and the PDSN(40,42) transmit and receive radio data through the PPP session(170).

Description

METHOOD FOR TRANSMITTING WIRELESS DATA IN A MOBILE COMMUNICATION SYSTEM}

The present invention relates to a third generation CDMA system, and in particular to a method for proper wireless data transmission in such a CDMA system.

Currently, the third generation CDMA system (hereinafter referred to as CDMA2000) essentially provides Internet service, and the Internet service using a CDMA network has a unique IP address assigned to a wired Internet network subscriber by an initial home ISP (Internet Service Provider). It also provides Mobile IP service. CDMA2000 performs interworking with Internet and external packet network in IP (Internet Protocol) network for Internet service. Packet data service in CDMA2000 uses the PDState as the Packet Data Serving Node (PDSN) and PDGN in the IP network, such as a Dormant State between a terminal and a base transceiver station / mobile switching center (BTS / MSC). Packet Data Gateway Node supports packet transmission capability to provide a service method suitable for packet communication such as the Internet.

Mobile IP is a method introduced to transfer data freely even when a mobile terminal is connected to a mobile terminal in order to use a PC or a notebook in use with a mobile communication network. The basic concept of Mobile IP performs routing function that transmits packet to temporary address that is supposed to move from Mobility management agent to transmit data regardless of IP address location. Mobile IP is a method that can transmit and receive data while maintaining a connection even when a mobile node (hereinafter referred to as MN) moves. It holds an IP address regardless of location and manages location information data of MN. That is, when a mobile terminal moves to another network and registers as a foreign agent (FA), the FA temporarily assigns an IP address to the mobile terminal.

RP [Radio Network (PD) -PDSN] sessions (Packet Data Serving Nodes (PDSNs) and Foreign Agent Control Nodes (FACNs), currently handling data traffic in CDMA2000. It aims to manage resources for session, appropriate call setup speed, and efficient IP (Internet Protocol) pool.

1 is a diagram illustrating a configuration of a CDMA2000 that provides a Mobile IP service.

Referring to FIG. 1, an incoming call is transmitted from a packet control function (PCF) 20 to a FACN so that a call is allocated to each real data traffic processing node PDSN and a setup for data transmission for the allocated call is performed. Setup) is performed. At this time, the efficient management of IP pools and the processing of appropriate data traffic in terms of resources for R-P sessions can be achieved through proper load balancing to the PDSN performed by the FACN. Specifically, Load Balancing function between FACN and PDSN is made by assigning call to the interface of two modules by combination of setting value and uniform round robin method of each module.

Hereinafter, the processing of FACN for Load Balancing on the incoming call from the PCF will be described briefly. 1) In the setting of the FACN, values such as a call load threshold (eg, 2500), a call balance threshold (eg, 100), a memory threshold (eg, 100), and a cpu usage threshold (eg, 100) may be designated. 2) The value of IP Pool can be specified in PDSN. 3) You can check whether Load Balancing is properly performed by raising the number of calls on each PDSN.

Referring to FIG. 1, when each module has setting values, when the call is increased in the mobile station simulator (MSSIM), the FACN 30 calls the PDSN2 (PDSN2 () until 100 calls are loaded. The call is made only to PDSN1 40 without raising the call to 42). However, if the number exceeds 101 and becomes 101, the call is made to PDSN2 (42). Load Balancing like this and PDSN2 (42) also raises a call to each PDSN by alternately calling one by one to PDSN1 (40) and PDSN2 (42) when there are more than 100 calls. Load Balancing by this process is a function of FACN. In addition, even when the number of PDSNs is 2 or more, load balancing is performed according to the same processing flow. Problems in Load Balancing between FACN and PDSN are as follows.

According to the FACN setting (call balance threshold), if 100 calls are first made to PDSN1 (40), then 100 call setups are made to PDSN2 (42). If the communication system includes a plurality of PDSNs, the processing of FACN for Load Balancing allocates a call to another PDSN only after all the IP pool addresses of one PDSN are used up. That is, after allocating 100 calls to PDSN2 42, the call is transferred to PDSN2 42 only after the 250 IP pools of PDSN1 40 are used up. If a call disconnected from PDSN1 occurs in the middle, all 250 IP pools allocated to PDSN1 are used again, and then the call is allocated to PDSN2 again. That is, after 100 calls are assigned to PDSN2, 250 calls are made to PDSN1, and then calls are made to PDSN2. If two calls are disconnected from PDSN1 even while only PDSN2 is entered, new calls enter PDSN1. Then, after all 250 calls are assigned to PDSN1, the call is returned to PDSN2. As such, the management of the ip pool resource is not performed properly, and the number of calls that are discarded is increased.

Therefore, call load management for PDSN is not properly performed in FACN at present. In addition, since IP Pool resources for ghost RP or dropped calls are not properly managed, occupancy may be maintained for unused IPs. Therefore, a new call may be discarded without receiving an IP assignment.

In addition, since there is no counting module for Incoming Call in FACN, information shared on the interface between PDSN and FACN cannot be managed.

Accordingly, the present invention adds one step to the call setup flow by adding a parameter considering the interface between the FACN and the PDSN, so that the appropriate wireless data can increase efficiency in RP session and IP pool management. It is an object to provide a method for transmission.

In addition, an object of the present invention is to enable proper load balancing according to the increase of increasing data traffic (Efficient Data Management) to reduce the waste of RP session resources (Essence Resource) management and efficient call pool (Call) It is an object of the present invention to provide a method for appropriate wireless data transmission that can reduce the success rate and time of setup.

In order to achieve the above object, the present invention provides a wireless network-packet data service node including a plurality of packet data service nodes (PDSN) and a forest agent control node (FACN) for processing data traffic (DataTraffic). A node system that manages and sets up a resource and IP pool for a session of an RP session, wherein the plurality of packets when the forest agent control node establishes a wireless data call to the plurality of packet data service nodes. Requesting information about the assignable IP pool each of the data service nodes, and the plurality of packet data service nodes, respectively, the response values including information about its assignable IP pool to the forest agent control node. Providing, by the forin agent control node using the response values; To a packet data service node of the data service node comprises the step of setting up a wireless data call.

The present invention applies to the data traffic network scheme (3GPP2).

1 is a diagram showing the configuration of a CDMA2000 providing a Mobile IP service;

2 is a diagram showing the configuration of a mobile communication system according to the present invention;

3 is a diagram illustrating a control flow for call setup between a PDSN and a FACN according to the present invention.

The present invention is to enable the appropriate load balancing by the FACN FACN in order to reduce the waste of RP session resources, and to reduce the success rate and time of call setup by efficiently managing the IP pool Adds a processing flow to each PDSN requesting and obtaining information on the assignable IP pool owned by the PDSN. The FACN selects the PDSN based on the imported information. Hereinafter, the present invention will be described in detail with reference to the drawings.

2 is a diagram illustrating a configuration of a mobile communication system according to the present invention.

Referring to FIG. 2, PDSN1 40 and PDSN2 42 provide an interface between a Data Core Network (DCN) and an external Internet network. In addition, PDSN1 40 and PDSN2 42 route / tunnel packets destined for a mobile node (MN) to a foreign agent (FA) and manage location information data of the MN. Between the interfaces of the PDSN1, PDSN2 (40, 42) and the FACN (30) there is a heartbeat message that periodically informs the situation that the session is maintained. Specifically, the heartbeat message is a message that is periodically sent from the PDSN to the FACN. If the heartbeat interval is 30 and the heartbeat lifetime factor is 3, the heartbeat message is normal. In this case, heartbeat messages are sent periodically to the FACN every 30 seconds. However, in case of abnormality, the FACN waits up to three times for the heartbeat message from the PDSN to come up every 30 seconds, and if the heartbeat message does not come up after that, the control flow is considered to be dead. Have Information contained in this heartbeat message includes items of Call Load / memory threshold / cpu usage threshold. In the present invention, the number of IPs remaining in the IP pool of each PDSN, that is, the number of assignable IP addresses, is added to the heartbeat message. That is, the present invention includes the information on the IP pool of each PDSN in the heartbeat message that is periodically sent from the PDSN to the FACN for load balancing, so that the FACN can efficiently manage the IP pool of the PDSN.

In another embodiment, the present invention may also directly request information about the IP pool from each FSN to each PDSN. 3 is a diagram illustrating a control flow for call setup between a PDSN and a FACN according to the present invention. Hereinafter, the load balancing of the FACN will be described with reference to FIGS. 2 and 3.

First, a call enters the PCF from the MN 10. The PCF 20 transmits control information to the FACN 30 (transmission of Registration_Request message) 110. Accordingly, session setup is performed between the MN 10 and the PCF 20. Subsequently, for an incoming call from the PCF 20 to the FACN 30, the FACN 30 transmits a message (Configuration_request) requesting information on the call load to the PDSN 40, 42. Specifically, the FACN 30 receives the registration request message (Registration_request) from the PCF 20, and requests the PDSN1 40 and the PDSN2 42 information about the assignable IP pool owned by each PDSN (Configuration_Request). )do. That is, the FACN 30 transmits an information request message (Configuration_Request) to the PDSN1 40 and the PDSN2 42 (120). Then, in response to the information request (Configuration_Request) for the IP pool, PDSN1 (40) and PDSN2 (42) remain in the IP pool of each PDSN, that is, the information about the assignable IP pool owned by each PDSN through the Configuration_Reply message A reply value including the number of IP addresses is provided to the FACN 30 (130). Accordingly, the FACN 30 performs load balancing to the PDSN using information on the assignable IP pool owned by the PDSN. Information about the IP pool from this PDSN is also added to the heartbeat message that periodically informs the situation that a session is maintained between the interface between the PDSN 40, 42 and the FACN 30.

Accordingly, the FACN 30 selects the PDSN with the few calls and informs the PCF (140). The PCF 20 receives PDSN selection information from the FACN 30 and requests a Point-to-Point Protocol (PPP) session establishment to the corresponding PDSN (40, 42) (150). PDSN 40,42 then provides a response to the PPP session establishment request (160). Accordingly, a PPP session is established between the PCF 20 and the PDSNs 40 and 42 (PPP Session Established). The MN 10 and the PDSNs 40 and 42 transmit and receive wireless data through the PPP session configured as described above (170).

The present invention is not limited to the above-described embodiment, and may be applied to a PCF to forward a call to an appropriate PDSN through Load Balancing, or applied to a PDSN to set one PDSN as Primary and load Balancing to the remaining PDSN. It can have a range of applications.

As such, the present invention enables efficient load balancing by managing the IP Pool of the PDSN in the FACN. That is, at present, the values that can be set in the FACN are values that do not consider the interface with the PDSN, so the present invention is configured to share the values considering the interface between the PDSN and the FACN as information with each other, thereby causing loss of IP or ghosting. ) It can reduce problems such as RP session.

The present invention described above enables appropriate load balancing according to an increase in increasing data traffic, thereby efficiently managing an IP pool, thereby reducing waste of RP session resources and setting up a call. Ensure proper wireless data transmission is achieved to reduce the success rate and time.

Claims (2)

Resources and IPs for radio-packet data service node (RP) session intervals, including a plurality of packet data service nodes (PDSNs) and forest agent control nodes (FACNs) to handle data traffic. A wireless data transmission method in a node system that manages and sets up a pool, Requesting, by the forest agent control node, information on an assignable IP pool each of the plurality of packet data service nodes, when establishing a radio data call to the plurality of packet data service nodes; Providing, by the plurality of packet data service nodes, response values including information about an assignable IP pool to the forest agent control node, respectively; And setting the wireless data call to the packet data service node of the plurality of packet data service nodes by using the response values. A plurality of packet data service nodes (PDSNs) and a forest agent control node (FACN) to handle data traffic, and each of the plurality of packet data service nodes (PDSNs) to a forin agent control node (FACN); A wireless data transmission method in a node system for periodically transmitting a heartbeat message, the plurality of packet data service nodes each adding information about their own assignable IP pool to a heartbeat message to the forest agent control node. To provide, Establishing, by the forin agent control node, a wireless data call to one packet data service node of the plurality of packet data service nodes using IP pool information included in the heartbeat message. Transmission method.