KR100414918B1 - Call processing system according to quality of service and method thereof in mobile communication system - Google Patents

Abstract

The present invention relates to a mobile communication system, which detects a service quality priority level of incoming packets and transmits the input packets according to the detected service quality priority level to a corresponding service quality priority among a plurality of service quality priority queues. After storing as queues, the packets stored in the quality of service priority queues are first-in-first-out in order from the highest quality of service level to improve service quality.

Description

CALL PROCESSING SYSTEM ACCORDING TO QUALITY OF SERVICE AND METHOD THEREOF IN MOBILE COMMUNICATION SYSTEM}

The present invention relates to a mobile communication system, and more particularly, to a packet data priority processing system and method according to a quality of service (QoS) priority among packet data service networks.

The UMTS (Universal Mobile Terrestrial System), which is a mobile communication system, is a system that performs 3rd generation mobile communication. The UMTS system supports not only voice service but also packet data service, and supports high speed data communication and video communication. A general packet radio service (GPRS) network, which is a packet data domain of the core network of the UMTS system, performs a packet data service, and includes a mobile station (MS) and a UTRAN (UMTS). Call processing between Terrestrial Radio Access Networks is performed according to quality of service (QoS) priorities. Call processing according to the QoS priority is implemented through a bandwidth allocation priority for a channel bearer and a queuing priority for traffic control when a call is first set up in the GPRS network.

Here, the conventional core network call processing structure will be described with reference to FIG. 1.

1 is a diagram illustrating a call processing structure of a conventional core network. First, a mobile station 111 having QoS priority 1 and a mobile station 121 having QoS priority 2 are connected to a packet radio service support node (SGSN) 1 (110). The mobile station 131 having QoS priority 1 and the mobile station 141 having QoS priority 2 are connected to the packet radio service support node 2 120. The packet radio service support node 1 110 and the packet radio service support node 2 120 are also connected to one gateway GPRS support node (GGSN) 130. Here, in FIG. 1, two packet radio service support nodes are connected to the radio packet radio service support node 130, but two or more multiple packet radio service support nodes may be connected. In addition, the gateway packet radio service support node 130 includes a radio packet radio service support node queue 140 for temporarily storing the generated call. Process the call in the order entered.

In addition, a queue structure of a conventional packet radio service support node (GSN) will be described with reference to FIG. 2.

2 is a diagram illustrating a queue structure of a conventional packet radio service support node. As shown in FIG. 2, each of the UTRAN 200, the service packet radio service support node 110, and the gateway packet radio service support node 130 each include a queue for processing incoming packets. have. Thus, each of the UTRAN 200, the service packet radio service support node 110, and the gateway packet radio service support node 130 processes packets in the order entered in the queue.

As such, in the QoS priority structure supported by the packet radio service network, only the QoS priority control between the mobile station and the UTRAN 200 is supported, and the service packet radio service support node 110 and the gateway packet radio service support node are supported. The QoS priority control scheme in the core-network between 130 is not specified. However, a plurality of gateway packet wireless service support nodes 110 may be connected to one gateway packet wireless service support node 130, and each of the plurality of service packet wireless service support nodes 110 may have a different QoS priority. Since a plurality of mobile stations are connected and are also connected by a router between the service packet radio service support node 110 and the gateway packet radio service support node 130, the GPRS support nodes (GSNs) Must have a buffer of At this time, if the QoS priority control based on the priority according to the stored order in the service packet wireless service support node 110 or the gateway packet wireless service support node 130 is not performed, the previous step is performed. The effect on reduced QoS priority control is reduced. For example, the service packet wireless service support node 1 110 and the service packet wireless service support node 2 120 connected to one gateway packet wireless service support node 130 as shown in FIG. There is a mobile station 111 of QoS priority 1 and a mobile station 121 of QoS priority 2 respectively as packet radio service support node 1 110, and QoS priority 1 is also present in service packet radio service support node 2 120. When each of the mobile station 131 and the mobile station 141 of the QoS priority 2 exists, the packet inputted to the gateway packet radio service support node queue 140 of the gateway packet radio service support node 130 is generated. It depends not on the QoS priority of the mobile stations but on the routing speed. That is, the packet of the mobile station 141 having the QoS priority 2 of the service packet radio service supporting node 2 120 is higher than that of the mobile station 111 having the QoS priority 1 of the service packet radio service supporting node 1 110. The situation where the routing is input first may occur. Thus, there is a problem that QoS priority support at the mobile station-to-end level becomes impossible in a packet radio service network.

3 is a diagram illustrating a QoS structure of a packet radio service according to the prior art, and a gateway packet radio service support node in a QoS architecture supporting the packet radio service network as shown in FIG. 3. It does not prescribe a support structure for QoS priority control in the core network between the (GGSN) Gateway GPRS Support Node (GGSN) 130 and the Serving GPRS Support Node (SGSN) 110. But. A plurality of service packet wireless service support nodes 110 may be connected to one gateway packet wireless service support node 130, and each of the plurality of service packet wireless service support nodes 110 has different QoS priorities. A plurality of mobile stations are connected, and a wireless packet service support node (GSN) is connected between the service packet wireless service support node 110 and the gateway packet wireless service support node 130 by a router. Each must have its own buffer. In this case, when the gateway packet wireless service support node 130 or the service packet wireless service support node 110 does not perform QoS priority control based on the priority according to the order stored in the buffer, it is performed in the previous step. QoS priority control effects are attenuated. As described above with reference to FIG. 2, there is a problem that QoS priority support at an end-to-end level is impossible in a packet radio service network.

Accordingly, an object of the present invention is to provide a call processing system and method for performing packet radio service according to QoS priority in a packet radio service network.

Another object of the present invention is to provide a call processing system and method for performing a packet radio service according to a quality of service (QoS) priority between a gateway packet radio service support node (GGSN) and a service packet radio service support node (SGSN). .

Another object of the present invention is to provide a call processing system and method having a queue structure according to QoS priority in a packet radio service network.

The system of the present invention for achieving the above objects; A call processing system according to a service quality priority of a mobile communication system, comprising: an input queue for first-in first-out incoming packets according to an input order, and a plurality of first-in-first-out firstly according to a quality of service priority level and an input order of the packets Service quality priority queues of the packet, the packet is read from the input queue, the service quality priority of the read packet is detected, and a corresponding service of the plurality of service quality priority queues according to the detected service quality priority. And a control unit for controlling to store as a quality priority queue, and an output queue for pre-empting and storing the packets stored in the quality of service priority queues in order of high service quality priority level according to the control of the control unit. It is done.

The method of the present invention for achieving the above objects; In a call processing method according to a quality of service priority in a mobile communication system having a plurality of quality of service priority queues storing input packets separately according to the quality of service priority level, detecting the quality of service priority levels of the incoming packets Storing the input packets as corresponding service quality priority queues among the plurality of service quality priority queues according to the detected quality of service priority level, and the packets stored in the quality of service priority queues. And a first-in, first-out order of the service quality priority levels.

1 is a view showing a call processing structure of a conventional core network

2 is a diagram illustrating a queue structure of a conventional packet radio service support node.

3 is a diagram illustrating a QoS structure of a packet radio service according to the prior art.

4 illustrates a packet wireless service network for performing functions in an embodiment of the present invention.

5 is a diagram illustrating a queue structure of a packet radio service support node according to an embodiment of the present invention.

6 is a diagram illustrating a multiple queue structure according to QoS priorities according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that in the following description, only parts necessary for understanding the operation according to the present invention will be described, and descriptions of other parts will be omitted so as not to distract from the gist of the present invention.

4 is a diagram schematically illustrating a packet radio service network for performing a function in an embodiment of the present invention.

First, a GPRS Support Node (GSN), a node supporting General Packet Radio Service (GPRS), is a function required to support packet radio service function for GSM and / or UMTS. And one or more packet radio service support nodes in any Public Land Mobile Network (PLMN) 300. The gateway GPRS support node (GGSN) 130 is a node connected by a packet data network because of the evaluation of a packet data protocol (PDP) address. Here, the PDP address includes routing information for users to which a PS (Packet Switched) is attached, and the routing information is a current connection point of a mobile station (MS), that is, a service packet wireless service support node (SGSN). Support Node) is used to tunnel N-PDUs to a connection point such as 110. The gateway packet radio service support node 130 requests location information from a home location register (HLR) 307 through an optical Gc 305 interface. The gateway packet radio service support node 130 becomes the first point of a PDN interconnect with a GSM PLMN that supports GPRS (ie, Gi 309 reference point supported by the gateway packet radio service support node 130). will be. The gateway packet radio service support node 130 function is a function corresponding to GSM and UMTS in common.

The service packet radio service support node 110 is a node serving the mobile station. The service packet radio service support node 110 may include GSM (ie, a Gb 311 interface supported by the service packet radio service support node 110) and / or UMTS (ie, the service packet radio service support node ( Packet radio service for the Iu 313 interface supported by 110). In the PS connection, the service packet radio service support node 110 establishes, for example, a mobility management context including information related to mobility and security of the mobile station. In activation of the PDP environment, the service packet radio service support node 110 establishes a PDP environment to be used for routing purposes with the gateway packet radio service support node 130 for use by the subscriber.

The service packet radio service support node 110 and the gateway packet radio service support node 130 functions may be combined in the same physical node or may exist in different physical nodes. The service packet radio service support node 110 and the gateway packet radio service support node 130 include an IP or other (at the operator's option, for example ATM-SVC) routing function and are interconnected by an IP router. . In the UMTS, the service packet radio service support node 110 and a radio network controller (RNC) are interconnected with one or more IP routers. When the service packet radio service support node 110 and the gateway packet radio service support node 130 are in different PLMNs, the service packet radio service support node 110 and the gateway packet radio service support node 130 are connected to a Gp. 315 are interconnected via an interface. The Gp 315 interface not only provides the Gn 317 interface function but also has the security function required for PLMN internal communication. The security function is based on mutual agreement between operators.

The service packet wireless service support node 110 transmits location information to a Mobile Switching Center (MSC) / Visitor Location Register (VLR) 321 through an optical Gs 319 interface. The service packet radio service support node 110 receives a paging request from the mobile switch / visitor location register 321 via the Gs 319 interface. The service packet radio service support node 110 interfaces with the GSM-SCF for selective Customized Applications for Mobile Network Enhanced Logic (CAMEL) control. Depending on the results resulting from the CAMEL interaction, the SESSION and packet data transmissions generally proceed.

In addition, the illustrated Ga 323 interface is a CDR (Call Detail Record) transmission device (for example, the service packet radio service support node 110 or the gateway packet radio service support node 130) and the CDR reception function (CGF) Perform a data collection interface between 325. The Gb 311 interface is an interface between the service packet radio service support node 110 and a base station system (BSS) 327, and the Gc 305 interface is the gateway packet radio service support node. An interface between the 130 and the home location register 307. The Gd 329 interface may include a short message service gateway (SMS-GMSC) 331, the service packet wireless service support node 110, and a short message service-interaction mobile exchange (SMS-GMSC). SMS-IWMSC: Short Message Service Interworking MSC (331) interface, Gf 333 interface is the interface between the service packet radio service support node 110 and the EIR (335). The Gi 309 is a reference point between the GPRS and an external packet data network, the Gn 317 is an interface between two GSNs in the same PLMN, and the Gp 315 supports two packet radio services in different PLMNs. As an interface between nodes, the Gp 315 interface enables packet radio service network service support through regions served by the interoperable packet radio service PLMNs. A Gr 337 interface is an interface between the service packet radio service support node 110 and a home location register 307, and the Gs 319 interface is a mobile switch / visitor location with the service packet radio service support node 110. It is an interface between the registers 321, and the Iu 313 is considered as a reference point while being an interface between the RNSs and the core network. And, R 339 is a reference point between a non-ISDN compatible TE (tunnel end point) and MT, and typically supports a reference serial interface. Um 341 is an interface between a mobile station and a portion of a GSM fixed network, and the Um 341 interface is a GSM network interface for providing packet radio service over the air to the mobile station. The MT portion of the mobile station is used to connect a packet radio service in GSM via the Um 341 interface. Uu 343 is an interface between the mobile station and the UMTS fixed network portion and is a UMTS network interface for providing packet radio service to the mobile station over the air. In FIG. 3, the part shown by the dotted line between the components is a signal interface, and the part shown by the solid line is a signal and data transfer interface.

Here, a queue structure of a packet radio service support node (GSN) according to an embodiment of the present invention will be described with reference to FIG. 5.

5 is a diagram illustrating a queue structure of a packet radio service support node according to an embodiment of the present invention. As shown in FIG. 5, each of the UTRAN (UMTSTerrestrial Radio Access Network) 200, the service packet radio service support node 110, and the gateway packet radio service support node 130 are queues for processing incoming packets, respectively. (Queue) is provided. Thus, each of the UTRAN 200, the service packet radio service support node 110, and the gateway packet radio service support node 130 processes packets in the order entered in the queue. As illustrated in FIG. 5, a plurality of service packet wireless service support nodes 110 may be connected to one gateway packet wireless service support node 130, and the plurality of service packet wireless service support nodes 110 may be connected. Since a plurality of mobile stations having different QoS priorities are connected to each other, and the service packet radio service support node 110 and the gateway packet radio service support node 130 are also connected by a router, a radio packet is transmitted. Each GPRS Support Node (GSN) has its own queue.

Looking at the queue structure of each of the UTRAN 200, the service packet radio service support node 110, and the gateway packet radio service support node 130, first, the UTRAN 200 is stored in a single time sequence of an incoming call. The service packet wireless service support node 110 and the gateway packet wireless service support node 130 have a multi-queue structure having respective queues according to QoS priorities of an incoming call. The service packet radio service support node 110 and the gateway packet radio service support node 130 determine a QoS priority of an incoming call and correspond to a queue for each QoS priority provided according to the determined QoS priority. The service packet radio service support node 110 and the gateway packet radio service support node 130 are each provided with a queue number of QoS priority levels. Here, the algorithm for determining the QoS priority of the incoming call by the service packet radio service support node 110 and the gateway packet radio service support node 130 is a packet IP for the mobile station to transmit the QoS priority at the initial call setup. Including the QoS priority related information of the packet in a type of service (TOS) region of a header and transmitting the information; and the service packet wireless service support node 110 and the gateway packet wireless service support node 130 And determining the QoS priority level of the corresponding packet by reading the TOS region of the packet IP header transmitted by the mobile station.

As described with reference to FIG. 5, the service packet radio service support node 110 and the gateway packet radio service support node 130 each have a multi-queue structure according to QoS priorities. See this for reference.

6 is a diagram illustrating a multiple queue structure according to QoS priorities according to an embodiment of the present invention.

First, when a packet is input to the service packet wireless service support node 110 as an example, the input packet is stored in the input queue 610 according to the input time sequence. Then, the service packet wireless service support node 110 extracts packets according to the order stored in the input queue 610, retrieves the packet IP header of the extracted packet, and retrieves the TOS region of the packet IP header. To detect the QoS priority of the input packet. Thus, the information is stored in the corresponding queue according to the detected QoS priority level. For example, the QoS priority 1 queue 611 when the QoS priority of the detected packet is level 1, and the QoS priority 2 queue 613 when the QoS priority of the detected packet is level 2, for example. When the QoS priority of the detected packet is level 3, respectively, the QoS priority 3 queue 615, and when the QoS priority of the detected packet is level 4, respectively, the QoS priority 4 queue 617. Save it. Therefore, when finally outputting the input packets, the packets are read in the order of the highest priority level from the respective queues and stored in the output queue 620, and then the service packet wireless service support node ( 110 outputs the data in the order stored in the output queue 620 and transmits the data to the corresponding transmission destination.

Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the scope of the following claims, but also by the equivalents of the claims.

As described above, the present invention has an advantage of enabling input packets inputted to a service packet radio service support node (SGSN) and a gateway packet radio service support node (GGSN) in a packet service network according to QoS priorities. Therefore, there is an advantage in that the QoS priority control impossible state generated by transmitting packets input to the service packet radio service support node and the gateway packet radio service support node according to the routing order rather than the QoS priority can be eliminated. Therefore, there is an advantage of improving the quality of service according to QoS in the packet service network.

Claims (16)

In the call processing system according to the service quality priority of the mobile communication system, An input queue that first-in-first-outs incoming packets in an input order; A plurality of quality of service priority queues pre-empted according to the quality of service priority level and input order of the packets; Read out the packet from the input queue, detect the service quality priority of the read packet, and control to store the service quality priority queue among the plurality of service quality priority queues according to the detected service quality priority. With the control unit, And an output queue configured to first-in-first-out packets stored in the quality of service priority queues in order of the highest quality of service priority levels under the control of the controller. The method of claim 1, The quality of service priority is included in a specific area of a packet IP header of the packet. The method of claim 2, And the specific area is a thioes area of a packet IP header. The method of claim 1, The total storage capacity of the plurality of quality of service priority queues is equal to the storage capacity of the input queue and output queue. A call processing method according to a quality of service priority in a mobile communication system having a plurality of quality of service priority queues for storing input packets separately according to a quality of service priority level, Detecting a service quality priority level of incoming packets; Storing the input packets as corresponding service quality priority queues among the plurality of service quality priority queues according to the detected quality of service priority level; And first-in, first-out of the packets stored in the quality of service priority queues in the order of the highest quality of service priority level. delete The method of claim 5, The quality of service priority is included in a specific area of a packet IP header of the packet. The method of claim 7, wherein Wherein the specific area is a thioes area of a packet IP header. In the call processing system according to the service quality priority of the mobile communication system, A mobile station for generating and transmitting packets to be transmitted at initial call establishment and quality of service priority level information of each of the packets; A service packet radio service support node which receives the packets, detects a quality of service priority level of each of the packets, classifies the packets by the quality of service priority level, and routes the packets having the highest priority level of the quality of service. The system, characterized in that it comprises a. The method of claim 9, Receive packets received from the service packet radio service support node, detect the service quality priority level of each of the received packets, classify the packets by the service quality priority level, and give the service quality priority level the highest priority. And the gateway packet radio service support node for routing from in packets. The method of claim 9, The mobile station includes a quality of service priority of the packet in a specific area of a packet IP header. The method of claim 11, And the specific area is a thioes area of a packet IP header. In the call processing method according to the service quality priority of the mobile communication system, Transmitting, by the mobile station, packets to be transmitted upon initial call setup and service quality priority level information of each of the packets to a service packet radio service support node; The service packet radio service support node receiving the packets detects a quality of service priority of each of the packets, and stores each of the packets in a corresponding quality of service priority queue according to the detected quality of service priority. Transmitting, from a packet having a highest quality of service priority level among the packets stored in the quality of service priority queues, to a gateway packet radio service support node; The gateway packet radio service support node detects a service quality priority of each packet received from the service packet radio service support node and routes the packets to a corresponding destination according to the detected service quality priority. The method characterized in that. The method of claim 13, The gateway packet radio service support node detects a service quality priority of each packet received from the service packet radio service support node, stores the service quality priority in the corresponding service quality priority queue according to the detected service quality priority, and then The method as claimed in claim 1, wherein the packet having the highest quality of service priority level among the packets stored in the quality of service priority queues is routed first. The method of claim 13, The mobile station includes a quality of service priority of the packet in a specific area of a packet IP header. The method of claim 15, Wherein the specific area is a thioes area of a packet IP header.