KR100399056B1 - Method of Wireless Communication Resource Allocation by Variable QoS Parameter Negotiation in Wireless Network - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

The present invention relates to a radio resource allocation method by variable quality of service parameter negotiation in a wireless communication network and a computer-readable recording medium recording a program for realizing the method.

2. Summary of Solution of the Invention

The present invention relates to a radio resource allocation method in a wireless communication network, in response to a re-registration request from a Radio Access Network Controller (RNC) (hereinafter referred to as "Source RNC") in charge of network control before relocation. Through a re-registration request message, a newly connected Serving GPRS Support Node (SGSN) (hereinafter referred to as "New SGSN") to the RNC (hereinafter referred to as "Target RNC") that will be in charge of network control after the re-registration. A first step of requesting radio resource allocation of the variable area; A second step of determining, by the target RNC, whether the requested radio resource is included in a variable region of negotiable quality of service parameters; And a third step of allocating the radio resource within a range of a variable area according to the determination result of the second step.

3. Important uses of the invention

The present invention is used for the relocation technology of the wireless communication network.

Description

Method of Wireless Resource Allocation by Negotiating Variable Quality of Service Parameters in Wireless Communication Networks {Method of Wireless Communication Resource Allocation by Variable QoS Parameter Negotiation in Wireless Network}

The present invention relates to a method for allocating a radio resource by negotiating variable quality of service (QoS) parameters in a wireless communication network and a computer-readable recording medium recording a program for realizing the method. By using RAB (Radio Access Bearer) parameter negotiation in the domain, the probability of relocation success is increased to support more stable handover.

That is, as a preferred embodiment, parameter negotiation is possible by setting lower limit values (Min_MBR, Min_GBR) for MBR (Maximum Bit Rate) and GBR (Guaranteed Bit Rate) parameters which have the most influence on traffic among RAB parameters.

In the conventional re-registration method between SGSN and SRNS, if fixed RAB parameter allocation is required for re-registration request information and the RB resource of the target Radio Access Network Controller (RNC) falls short of the parameter value, between SGSN and SRNS Re-registration failed to handle.

On the other hand, the re-registration process between SGSN and SRNS associated with handover is handled with higher priority than the new call, and if it fails to reach the required RAB resource, it fails. There is a problem that results in more serious results, especially in the wireless environment in which the service subscribers move.

The present invention has been proposed to solve the above-mentioned problems of the prior art, and increases the probability of success during relocation between SGSN and SRNS by using the RAB parameter negotiation scheme in the packet domain of the next-generation mobile communication network. An object of the present invention is to provide a radio resource allocation method for supporting a more stable handover and a computer-readable recording medium recording a program for realizing the method.

That is, the present invention adds a parameter negotiation method to the re-registration process between SGSN and SRNS by the conventional fixed parameter allocation request, and as a preferred embodiment, the lower limit value for the MBR and GBR parameters having the most influence on the traffic among RAB parameters. Min_MBR, Min_GBR) enables variable quality of service negotiations between MBR and Min_MBR parameter values, or between GBR and Min_GBR parameter values, increasing the probability of successful re-registration between SGSN and SRNS, resulting in overall handover success. I want to increase the probability.

1A is a diagram illustrating an embodiment of a connection state before a relocation process between a Serving GPRS Support Node (SGSN) and a Serving Radio Network Subsystem (SRNS) is performed in a next generation mobile communication network to which the present invention is applied.

1B is a diagram illustrating an embodiment of a connection after a re-registration process between SGSN and SRNS is performed in a next-generation mobile communication network to which the present invention is applied.

2 is a flowchart illustrating a message processing procedure to which a method for allocating a radio resource by a variable quality of service parameter negotiation according to the present invention is applied.

3A and 3B are detailed flowcharts of one embodiment of a method for allocating a radio resource by negotiating variable quality of service parameters according to the present invention;

4 is an exemplary explanatory diagram showing a pseudo code for expressing a variable quality of service parameter negotiation according to the present invention according to the present invention.

* Explanation of symbols for the main parts of the drawings

100: IMT-2000 core network (packet domain) 101: packet terminal device

102: Node-B # 0 104: RNC # 0

106: switch / router 107: SGSN # 0

109: GGSN 110: Domain Name Server

111: MSC / VLR / HLR 112: External Information Network

113: RNS

The present invention for achieving the above object, in the radio resource allocation method in a wireless communication network, RNC (Radio access Network Controller) responsible for network control before relocation (hereinafter referred to as "Source RNC") In accordance with the re-registration request of the newly connected, a Serving GPRS Support Node (SGSN) (hereinafter referred to as "New SGSN") is set to RNC (hereinafter referred to as "Target RNC") that will be in charge of network control after the re-registration. A first step of requesting radio resource allocation of the variable region through a re-registration request message; A second step of determining, by the target RNC, whether the requested radio resource is included in a variable region of negotiable quality of service parameters; And a third step of allocating the radio resource within a range of the variable area according to the determination result of the second step.

Meanwhile, in the present invention, a new SGSN, which is newly established for connection, is in charge of network control after re-registration in response to a re-registration request from a source RNC in charge of network control before relocation in a wireless communication network system having a processor. A first function of requesting radio resource allocation of a variable region through a re-registration request message to the target RNC; A second function of determining, by the target RNC, whether the radio resource requested is included in a variable region of a negotiable quality of service parameter; And a computer-readable recording medium having recorded thereon a program for realizing a third function of allocating the radio resource within a range of a variable area according to the determination result of the second function.

The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1A is a diagram illustrating an embodiment of a connection state before a relocation process between SGSN and SRNS is performed in a next generation mobile communication network to which the present invention is applied.

The re-registration method between SGSN and SRNS is applicable to the next generation mobile communication network, and the IMT-2000 core network (packet domain) 100 includes SGSNs 107 and 108, GGSN 109, switch / router 106, and domain names. Server 110. In addition, the IMT-2000 core network (packet domain) 100 is a mobile switching center (MSC) / Visitor Location Register (VLR) / Home Location Register (HLR) 111, external information It is interconnected with the communication network 112 and the radio access network controller (RNC) 104 and 105, and the packet is in a state before the re-registration process between the SGSN and the SRNS occurs as shown in FIG. Terminal device 101 is external through Node-B # 1 (103), RNC # 1 (105), RNC # 0 (104), switch / router 106, SGSN # 0 (107), GGSN (109) It is connected to the information communication network 112 to send and receive traffic.

Here, the MSC / VLR 111 and the HLR 111 are physically separated but are shown as the same node for convenience.

In FIG. 1A, a thick solid line indicates a currently active link state, which indicates a state before a re-registration process between SGSN and SRNS is performed.

1B is a diagram illustrating an embodiment of a connection after a re-registration process between SGSN and SRNS is performed in a next-generation mobile communication network to which the present invention is applied.

Each module constituting FIG. 1B is the same as that of FIG. 1A. After re-registration process between SGSN and SRNS occurs as shown in FIG. 1B, the packet terminal apparatus 101 performs Node-B # 1 103 and RNC. It is connected to the external information communication network 112 through the # 1 (105), the switch / router 106, SGSN # 1 (108), GGSN (109) to send and receive traffic.

In FIG. 1B, a thick solid line indicates a currently active link state, which indicates a state after a re-registration process between SGSN and SRNS occurs.

As shown in FIG. 1B, when the re-registration process between SGSN and SRNS is performed, the target serviced by the IMT-2000 core network (packet domain) 100 is moved from RNC # 0 104 to RNC # 1 105. The link between SGSN # 0 107 and RNC # 0 104 and the link between RNC # 0 104 and RNC # 1 105 are deactivated and SGSN # 1 108 becomes the new SGSN. The link between SGSN # 1 108 and RNC # 1 105 is newly activated.

2 is a flowchart illustrating a message processing procedure to which a radio resource allocation method based on a variable quality of service parameter negotiation according to the present invention is applied.

First, when the source RNC 201 requests SRNS relocation through the Old SGSN 203 (206, 207), the New SGSN 205 changes the message through the "Relocation Request" message to the Target RNC 202. The RAB resource allocation request of the zone is made (208). Then, the target RNC 202 determines whether the requested RAB resource is included in the corresponding area, and responds with a "Relocation Request Acknowledge" message (209).

Here, the negotiation method of the RAB parameter was used in the procedures (208, 209) for transmitting and receiving the Relocation Request message and the Relocation Request Acknowledge message, which is an important feature of the present invention. In this case, the RAB parameter to be negotiated in the variable region is targeted to MBR and GBR which have the most influence on traffic as the preferred embodiment. When there are too many parameters to be negotiated, this results in a decrease in performance. Was selected. A more detailed description thereof will be described later with reference to FIG. 3.

Subsequently, the New SGSN 205 receiving the "Relocation Request Acknowledge" message (209) transmits the result corresponding to the received message to the Old SGSN 203 through the "Forward Relocation Response" message (210), and the Old SGSN 203 transfers a "Relocation Command" message to the Source RNC 201 to inform the information of the relocation resource allocation procedure (211).

Subsequently, the source RNC 201 delivers a 2 " Relocation Commit " message via the Iu interface, indicating that it delegates its role as the RNC to the target RNC 202. In response, the target RNC 202 forwards the message “Relocation Detect” to the New SGSN 205 to notify the New SGSN 205 that it is currently serving the RNC 202 (213). The New SGSN 205 then sends a " Update PDP Context Request " message to the Gateway GPRS Support Node (GGSN) 204 to change the Packet Data Protocol (PDP) Context information associated with the RAB information and the RNC information currently in service. Transmit (214) and receive a "Update PDP Context Response" message in response (215).

Subsequently, the New SGSN 205 receives (216) a "Relocation Complete" message with SRNS Relocation Complete information from the Target RNC 202, and sends a "Forward Relocation Complete" message to inform the Old SGSN 203 of this. 217, and receives a "Forward Relocation Complete Acknowledge" message in response (218).

Finally, the Old SGSN 203 sends a "Iu Release Command" message to the Source RNC 201 to release the corresponding Iu connection and receives a "Iu Release Complete" message in response (220) to all SRNS. Complete the relocation procedure.

3A and 3B are detailed flowcharts of an embodiment of a method for allocating a radio resource by negotiating variable quality of service parameters according to the present invention.

Here, the process of negotiating Quality of Service (QoS) profile for Conversational or Streaming traffic class and negotiating quality of service profile for Interactive or Background traffic class is shown.

First, the target RNC 202 receives the relocation request signal from the New SGSN 205 (300), and determines the type of traffic class (301).

As a result of the determination, in the case of the conversational or streaming traffic class (302), it is checked whether the remaining RAB resources satisfy the corresponding MBR and GBR (303, 304).

If the remaining RAB resource does not satisfy the corresponding MBR and GBR, it is analyzed whether the MBR lower limit (Min_MBR) and the GBR lower limit (Min_GBR) are satisfied (305 and 306).

If the remaining RAB resource satisfies the corresponding MBR and GBR, the corresponding RAB resource is allocated (307), and a relocation grant message is transmitted to the New SGSN 205 (308).

In addition, if the remaining RAB resource satisfies the value between MBR and Min_MBR, and satisfies the value between GBR and Min_GBR, the corresponding RAB resource is also allocated (307), and a relocation acknowledgment message is transmitted to the New SGSN (205) (308). ).

On the other hand, if the remaining RAB resource does not satisfy the value between MBR and Min_MBR, or does not satisfy the value between GBR and Min_GBR, a relocation failure message is transmitted to the New SGSN 205 (309).

On the other hand, if the determination result 301, Interactive or Background traffic class (310), it is checked whether the remaining RAB resources satisfy the corresponding MBR (311).

If the remaining RAB resource satisfies the MBR, the corresponding RAB resource is allocated (313) and a relocation grant message is transmitted to the New SGSN 205 (314). If the remaining RAB resource satisfies the value between MBR and Min_MBR, the corresponding RAB resource is allocated (313) and a relocation grant message is transmitted to the New SGSN 205 (314).

On the other hand, if the remaining RAB resource does not satisfy the value between MBR and Min_MBR, and sends a Reloction failure message to the New SGSN (205) (315).

4 is an exemplary diagram illustrating a pseudo code for expressing a variable quality of service parameter negotiation according to the present invention according to the present invention.

As described above, the method of the present invention may be implemented as a program and stored in a recording medium (CD-ROM, RAM, ROM, floppy disk, hard disk, magneto-optical disk, etc.) in a computer-readable form.

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and various substitutions, modifications, and changes are possible in the art without departing from the technical spirit of the present invention. It will be clear to those of ordinary knowledge.

As described above, the present invention has an effect of minimizing the probability of failure of a handover call having a higher priority than a new call by defining an RAB parameter of a variable region and enabling parameter negotiation. In addition, when such negotiation is made, the probability of SRNS relocation success of the next generation mobile communication network can be increased under the radio resource environment that is relatively short compared to the wired line, thereby increasing the overall probability of handover call success.

Claims (5)

In the radio resource allocation method in a wireless communication network, Serving GPRS Support Node (SGSN) newly established according to a re-registration request from a Radio Access Network Controller (RNC) (hereinafter referred to as "Source RNC") in charge of network control prior to relocation. A first step of requesting radio resource allocation of a variable area through a re-registration request message to an RNC (hereinafter referred to as a "Target RNC") that the "New SGSN" will be in charge of network control after the re-registration; A second step of determining, by the target RNC, whether the requested radio resource is included in a variable region of negotiable quality of service parameters; And A third step of allocating the radio resource within a range of a variable region according to the determination result of the second step Radio resource allocation method by a variable quality of service parameter negotiation in a wireless communication network comprising a. The method of claim 1, The negotiable quality of service parameter is Preferably, a variable quality of service parameter in a wireless communication network including a maximum bit rate (MBR) and a guaranteed bit rate (GBR), which have the most influence on traffic, and a lower limit value (Min_MBR, Min_GBR) for each parameter. Radio resource allocation method by negotiation. The method of claim 1, The second step, A fourth step of determining, by the target RNC, the type of traffic class requested by the New SGSN; A fifth step of checking whether a remaining radio resource value is equal to or higher than a corresponding MBR and GBR value in the case of a conversational or streaming traffic class as a result of the determination in the fourth step; A sixth step of analyzing whether the remaining radio resource value is less than the corresponding MBR and GBR values, if the remaining radio resource value is less than the MBR lower limit value (Min_MBR) and the GBR lower limit value (Min_GBR); A seventh step of checking whether the residual radio resource value is equal to or larger than the corresponding MBR value when the determination result of the fourth step is an interactive or background traffic class; And An eighth step of analyzing whether the remaining radio resource value is less than the corresponding MBR value, if the remaining radio resource value is less than the MBR lower limit value (Min_MBR); Radio resource allocation method by a variable quality of service parameter negotiation in a wireless communication network comprising a. The method according to any one of claims 1 to 3, The third step, A ninth step of allocating the radio resource and transmitting a re-registration approval message to the New SGSN if the remaining radio resource value is equal to or greater than the corresponding MBR and GBR value; As a result of the analysis of the sixth step, if the residual radio resource value is equal to or greater than the Min_MBR value and equal to or greater than the Min_GBR value, the radio resource is allocated and a re-registration approval message is transmitted to the New SGSN, and the residual radio resource value is equal to the Min_MBR value or Min_GBR. A tenth step of transmitting a re-registration failure message to the New SGSN if less than the value; An eleventh step of transmitting a re-registration approval message to the new SGSN by allocating the radio resource if the remaining radio resource value is equal to or greater than the corresponding MBR value as a result of the inspection in the seventh step; And As a result of the analysis of the eighth step, if the residual radio resource value is equal to or greater than the Min_MBR value, the radio resource is allocated and a re-registration approval message is transmitted to the New SGSN. If it is less than Min_MBR, a re-registration failure message is transmitted to the New SGSN. 12th Step Radio resource allocation method by a variable quality of service parameter negotiation in a wireless communication network comprising a. In a wireless communication network system having a processor, In response to a re-registration request from the Source RNC in charge of network control before relocation, a new SGSN, which is newly established, is connected to a target RNC to be in control of the network after re-registration. A first function of requesting resource allocation; A second function of determining, by the target RNC, whether the radio resource requested is included in a variable region of a negotiable quality of service parameter; And A third function of allocating the radio resource within a range of a variable area according to a determination result of the second function A computer-readable recording medium having recorded thereon a program for realizing this.