KR20110090641A - Method for assigning carriers to a mobile communication system - Google Patents

Abstract

PURPOSE: A carrier allocation method of mobile communication system is provided to allocate a carrier according to a service property requested by a portable terminal by creating a traffic channel allocation message reflected a carrier allocation method. CONSTITUTION: A request message is created in order to establish a value corresponding to an operating application program and is transmitted to a base station(S201, S202). The base stating analyzes a connecting request message received from a portable terminal(S204). A carrier allocation method of a forward link and a reverse link corresponding to a value included in a request reason field. A traffic channel message reflected a selected carrier allocation method is created and transmits to the portable terminal.

Description

Method for assigning carriers to a mobile communication system

The present invention relates to a carrier allocation method of a mobile communication system, and more particularly, the number of forward link carriers and reverse link carriers according to the type of service requested by a mobile communication network in a 1x EV-DO Rev.B system. It relates to a carrier allocation method for determining the.

CDMA 2000 1x EV-DO (1x Evolution-Data Optimized), one of the new technologies for 3G mobile communication, is a technology that supports higher data rates than conventional CDMA systems and is a step up from CDMA 2000 1X. There is a single carrier (single carrier) method. On the other hand, in 1x EV-DO Revision B (Rev. B) technology, the terminal device can receive and transmit data by receiving multiple carriers (up to three) from the network, thereby improving speed compared to revision A (Rev. A). It can be said. EV-DO Rev. In the mobile communication system using the B technology, a mobile terminal user can watch mobile TV, listen to streaming music, and make VoIP calls while surfing the Internet or transmitting multimedia contents on a network. Make the most of your network and devices.

1 is an exemplary view schematically showing a 1 × EV-DO system. Looking at its configuration, the mobile communication terminal 5 performs voice and video calls through an access network (AN) 3 and a forward link carrier and a reverse link carrier and performs data. Perform the exchange.

The base station (AN) 3 provides a data connection between the packet-switched data network and the mobile communication terminals. Since the base station (AN) 3 is substantially the same as the base station in CDMA 2000, it will be referred to as a base station hereinafter. do

The Packet Control Function Unit (PCF) 2 mainly performs functions such as mapping, call control, mobility management, session management, data buffering and dispatching between the radio link and the radio link.

The Packet Data Serving Node (PDSN) 1 mainly performs functions such as link management, mobility management, address distribution, data routing, and the like.

The Mobile Switching Center (MSC) 4 performs a voice switching function.

Figure 2 is a 1x EV-DO Rev. according to the prior art. Signal flow diagram illustrating a carrier allocation process in B. FIG.

When the user of the mobile communication terminal executes a predetermined application requiring data exchange with the base station in the process of using the mobile communication terminal, the mobile communication terminal sends a connection request message to the base station (AN). (S101).

Subsequently, the mobile communication terminal transmits a route update message to the base station AN in order to indicate the wireless environment of the mobile communication terminal (S102).

The base station (AN) transmits a media access control (MAC) layer acknowledgment message (MAC layer ack message) to the mobile communication terminal to confirm receipt of the path update message (S103).

The base station (AN) transmits a traffic channel assignment message to the mobile communication terminal (S104).

The mobile communication terminal establishes a reverse traffic channel (RTC) and transmits a pilot signal and a data rate control (DRC) signal to the base station (AN) (S105).

The base station AN transmits a reverse traffic channel acknowledgment message (RTC ack message) to the mobile communication terminal to confirm that the signal has been received through the reverse traffic channel (RTC) (S106).

The mobile communication terminal transmits a traffic channel complete message (traffic channel complete message) indicating that the traffic channel establishment is completed (S107).

Data exchange between the mobile communication terminal and the base station (AN) is performed.

In the carrier allocation process according to the prior art, which is performed as described above, as shown in FIG. 3, the base station (AN) is assigned to the forward link carrier and the reverse link carrier for all data connection requests received from the mobile communication terminal. Similarly, multicarriers are allocated. Therefore, when the mobile communication terminal and the base station exchange a small amount of data with each other, even though only a single carrier may be used, the efficiency of the network is reduced by allocating a multicarrier.

An object of the present invention is to provide a carrier allocation method in a mobile communication system that can efficiently use a network.

Another object of the carrier allocation method in a mobile communication system according to the present invention is to allocate a carrier in accordance with the characteristics of a service requested by a mobile communication terminal.

Another object of the carrier allocation method in the mobile communication system according to the present invention is to prevent waste of network resources caused by unnecessary carrier allocation.

In a mobile communication system according to the present invention, a carrier allocation method includes a forward link and a forward link using information included in a connection request message received by an access network from an access terminal. It is characterized by variably allocating a carrier of the reverse link.

Another aspect of the carrier allocation method in the mobile communication system according to the present invention is that the access terminal corresponds to an application currently running in a request reason filed of a connection request message. Generating and transmitting a connection request message to a base station to set a value; A base station (Access Network) analyzes the connection request message received from the mobile terminal (Access Terminal), and determines the carrier allocation method of the forward link and reverse link to correspond to the value included in the request reason field, the determined carrier And generating and transmitting the traffic channel assignment message reflecting the allocation method to the mobile communication terminal.

Another aspect of the method for allocating a carrier in a mobile communication system according to the present invention comprises the steps of a mobile terminal (Access Terminal) transmitting a connection request message (Connection request) to a base station (Access Network); The base station analyzes the information included in the connection request message, differentiates and allocates the number of carriers of the forward link and the reverse link, and assigns a traffic channel assignment message including the corresponding information to the mobile communication. Transmitting to a terminal; Establishing, by the mobile communication terminal, a reverse traffic channel and transmitting pilot and DRC signals to the base station; Transmitting, by a base station, a message confirming reception of the reverse traffic channel to a mobile communication terminal; The mobile communication terminal transmitting a traffic channel establishment complete message to the base station; And exchanging data between the mobile communication terminal and the base station.

Another feature of the carrier allocation method in the mobile communication system according to the present invention is that the base station uses the information stored in the request reason field of the connection request message.

According to another aspect of the present invention, there is provided a method for allocating a carrier in a mobile communication system according to the present invention. This is true.

According to another aspect of the present invention, there is provided a method for allocating a carrier in a mobile communication system, when the base station receives a download-oriented service from a mobile communication terminal, assigns multiple carriers to a forward link and a single carrier to a reverse link. If requested, a single carrier is assigned to the forward link and multiple carriers to the reverse link, and if a service is requested with a small amount of transmit / receive data, a single carrier is assigned to both the forward link and the reverse link. All carriers are allocated to the reverse link.

The carrier allocation method in the mobile communication system according to the present invention has the following effects.

First, network waste caused by unnecessary carrier allocation can be prevented.

Second, network channels can be utilized efficiently.

Third, since only as many resources are used as necessary in the mobile communication terminal, the remaining resources can be used in other mobile communication terminals.

1 is an exemplary view schematically showing a general 1 × EV-DO system.
2 is a signal flow diagram illustrating a process of a carrier allocation method according to the prior art.
3 is an exemplary diagram illustrating that multiple carriers are allocated between a mobile communication terminal and a base station according to a carrier allocation method according to the prior art.
4 is a signal flow diagram illustrating the progress of a carrier allocation method according to the present invention.
5 is an exemplary view showing a carrier assignment state according to an embodiment of the present invention.
6 is an exemplary view showing a carrier assignment state according to another embodiment of the present invention.
7 is an exemplary view showing a carrier assignment state according to another embodiment of the present invention.
8 is an exemplary view showing a carrier assignment state according to another embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In the drawings, parts irrelevant to the description are omitted for simplicity of explanation, and like reference numerals designate like parts throughout the specification.

Throughout the specification, when a part is said to "include" a certain component, it means that it can further include other components, without excluding other components unless specifically stated otherwise. In addition, the terms "... part", "... group", "module", "block", etc. described in the specification mean a unit that processes at least one function or operation.

4 is a signal flow diagram illustrating the progress of a carrier allocation method according to the present invention. When the user of the mobile communication terminal executes an application requiring data exchange with the base station, the mobile communication terminal generates a connection request message to be transmitted to the base station. The connection request message includes a message ID, a transaction ID, and a request reason field. The mobile communication terminal according to the present invention may differently request a carrier allocation scheme from the base station by changing a value stored in the request reason field (S201).

The mobile communication terminal transmits a connection request message generated differently according to the type of service requested to the base station (S202).

Subsequently, the mobile communication terminal transmits a route update message to the base station AN to indicate a wireless environment of the mobile communication terminal (S203).

The base station AN receives the connection request message from the mobile communication terminal and checks the value stored in the request reason field in the connection request message to determine the type of service currently requested by the mobile communication terminal (S204).

Subsequently, a medium access control layer acknowledgment message (MAC layer ack message) is transmitted to the mobile communication terminal to confirm that the path update message has been received (S205), and traffic in which carrier allocation information is stored according to a result of analyzing the connection request message is transmitted. A channel assignment message is transmitted to the mobile communication terminal (S206).

The mobile communication terminal establishes a reverse traffic channel (RTC) and transmits a pilot signal and a data rate control (DRC) signal to the base station (AN) (S207).

The base station (AN) transmits a reverse traffic channel confirmation message (RTC ack message) for confirming that the signal has been received through the reverse traffic channel (RTC) to the mobile communication terminal (S208).

The mobile communication terminal transmits a traffic channel complete message to the base station AN indicating that the traffic channel establishment is completed (S209).

Data exchange between the mobile communication terminal and the base station (AN) is performed.

Field information of the connection request message according to an embodiment of the present invention is shown in Table 1 below.

field Stored value Message ID 0 x 01 Transaction ID 0 x 2E Request reason 0 x 2

"0 x 01" indicated as a message ID value is used as a value indicating a connection request, and the mobile terminal is stored in a request reason field value used as an initialization value of the connection terminal when generating a connection request message. The type of service requested by the terminal may be displayed by changing the value. In an embodiment of the present invention, a value stored in the request reason field “0 × 2” indicates a case in which multiple carriers are required for the forward link, but only a single carrier is needed for the reverse link.

FIG. 5 is an exemplary diagram illustrating a carrier allocation state according to this embodiment. As shown in FIG. 5, a multicarrier is allocated to a forward link and a single carrier is assigned to a reverse link. ) Is assigned. For example, a program running on a mobile communication terminal is a download-oriented service, that is, a mobile terminal from a mobile communication terminal to a base station through a reverse link such as an internet browser or web viewer service. This is applied to a case where a small amount of data is transmitted but a service requesting a large amount of data to be received from a base station through a forward link is requested.

Field information of the connection request message according to another embodiment of the present invention is shown in Table 2 below.

field Stored value Message ID 0 x 01 Transaction ID 0 x 2E Request reason 0 x 3

FIG. 6 is an exemplary diagram illustrating a carrier allocation state according to this embodiment. As illustrated, a single carrier is allocated to a forward link and a multi carrier is assigned to a reverse link. ) Is assigned. For example, a user-created content generated by an application driven by a mobile communication terminal, that is, an upload-oriented service having a large amount of data to be transmitted from the mobile communication terminal to a base station. : UCC) In case that data such as video is registered in web server through base station or transmitted to other mobile communication terminal user, the amount of data transmitted by base station to mobile communication terminal through forward link is small but reverse link in mobile communication terminal. This is applied when requesting a service having a large amount of data to be transmitted to a base station through.

Table 3 shows field information of a connection request message according to another embodiment of the present invention.

field Stored value Message ID 0 x 01 Transaction ID 0 x 2E Request reason 0 x 4

FIG. 7 is an exemplary diagram showing a carrier allocation state according to this embodiment, and shows that a single carrier is allocated to both a forward link and a reverse link as shown. A small amount of data transmitted / received between a mobile communication terminal and a base station. For example, a small amount of data is transmitted from a base station to a mobile communication terminal through a forward link, such as a video call service, and data transmitted from a mobile communication terminal to a base station through a reverse link. The amount can also be applied in small cases.

Table 4 shows field information of a connection request message according to another embodiment of the present invention.

field Stored value Message ID 0 x 01 Transaction ID 0 x 2E Request reason 0 x 5

FIG. 8 is an exemplary diagram showing a carrier allocation state according to this embodiment, and shows that multicarriers are allocated to both a forward link and a reverse link as shown. Like an interactive service with a large amount of data transmitted and received between a mobile station and a base station, a large amount of data is transmitted from a base station to a mobile terminal through a forward link and a data amount transmitted from a mobile terminal to a base station through a reverse link. It can be applied in many cases.

1: PDSN (Packet Data Serving Node) 3: AN (Access Network)
2: PCF (Packet Control Function unit) 5: Mobile communication terminal
4: MSC (Mobile Switching Center)

Claims (5)

Generating, by the access terminal, a connection request message to the base station so that a value corresponding to a currently running application program is set in a request reason filed of the connection request message;
A base station (Access Network) analyzes the connection request message received from the mobile terminal (Access Terminal), and determines the carrier allocation method of the forward link and reverse link to correspond to the value included in the request reason field, the determined carrier And generating and transmitting the traffic channel assignment message reflecting the allocation method to the mobile communication terminal. The method of claim 1, wherein the mobile communication terminal determines a value set in the request reason field by dividing a type of application program into a download-oriented service, an upload-oriented service, a service having a small amount of transmission / reception data, and a service having a large amount of transmission / reception data. A carrier allocation method of a mobile communication system, characterized by the above-mentioned. Generating and transmitting a connection request message to a base station (Access Network) to include a different value according to the type of service requested by an access terminal;
The base station analyzes the information included in the connection request message to determine the number of carriers of the forward link and the reverse link, and sends the traffic channel assignment message reflecting the determined carrier allocation information to the mobile communication terminal. Transmitting to;
Establishing, by the mobile communication terminal, a reverse traffic channel and transmitting a pilot and DRC signal to the base station;
Transmitting, by a base station, a message confirming reception of the reverse traffic channel to a mobile communication terminal;
The mobile communication terminal transmitting a traffic channel establishment complete message to the base station;
And a step of exchanging data between the mobile communication terminal and the base station. 4. The method of claim 3, wherein the base station determines the number of carriers in the forward and reverse directions by using information stored in a request reason field of the connection request message. The carrier of claim 3, wherein the type of service requested by the mobile communication terminal is classified into one of a download-oriented service, an upload-oriented service, a service having a small amount of transmission / reception data, and a service having a large amount of transmission / reception data. Assignment method.

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