KR100425717B1 - Forward link data transmission method of mobile communication - Google Patents

Abstract

The present invention relates to a method of transmitting forward link data in mobile communication, and is capable of transmitting data to a predetermined data rate through negotiation between a base station and a terminal on a data rate on a forward link that varies due to slot allocation and a propagation environment. To this end, the present invention, in the forward link data transmission method of mobile communication, when the traffic channel between the access terminal (AT) and the access network (AN) [Access Point (AP) / Access Point Controller (APC)] is completed, Transmitting, by an access terminal (AT), a DATa RATe Request message to an access network (AN) (access point (AP) / access point controller (APC)] to request a value of a certain data rate; (Access Network) [Access Point (AP) / Access Point Controller (APC)] further includes transmitting a DATa RATe Response message for a data sheet requested by the Access Terminal (AT).

Description

Forward link data transmission method of mobile communication {FORWARD LINK DATA TRANSMISSION METHOD OF MOBILE COMMUNICATION}

The present invention relates to a method of transmitting forward link data in mobile communication, and more particularly, a mobile device capable of transmitting data to a constant data rate through negotiation between a base station and a terminal on a data link on a forward link that varies due to slot allocation and propagation environment. The present invention relates to a forward link data transmission method of communication.

In general, a call circuit connection of a CDMA radio section is divided into a forward call link for connection from a base station to a terminal and a reverse call link for connection from a terminal to a base station.

Unlike the IS-95A / B and CDMA1x, 1xEV always maintains a constant output for the entire data call and control call on the forward link.

Each terminal receives its own data in a time division time (TDM) manner in the forward link. The base station schedules the data by the data rate control channel uploaded on the reverse link in each terminal and then forwards the data. The data is sent back to each terminal over the link to the appropriate data rate.

In this way, the terminal receiving the data allocates a data rate using a carrier-to-interference (C / I) ratio, and the base station receives a data rate control signal (DRC: Data Rate Control) determined by each terminal. The data rate is determined according to the data rate control signal DRC.

The data rate control signal DRC means a control signal transmitted through a physical channel of a reverse link, and the base station interprets the data rate control signal, and the terminal modulates the data rate value of FIG. 1. Each slot is allocated using a scheme.

At this time, the base station transmits information on how long the data rate control signal DRC should be transmitted through a traffic channel assignment message with reference to FIG.

3 is a diagram illustrating an example of a mapping table of data sheets versus C / I for guaranteeing a 1% packet error rate (PER).

Referring to FIG. 4, a method of transmitting 1xEV forward link data will first be described. In the case of a new session, an access terminal (AT) requests allocation of a unicast access terminal identifier (ID). A UATI-Request message is transmitted to an access network (AN) [access point (AP) / access point controller (APC)] (a).

The access network (AN) (access point (AP) / access point controller (APC)] allocates a UATI and transmits a corresponding UATI-Assignment message to an access terminal (AT) accordingly (b). The terminal sends a UATI-Complete message for notifying that it has received the UATI-Assignment message to the Access Network (AN) (Access Point (AP) / Access Point Controller (APC)] (c).

Thereafter, the access terminal (AT) communicates with an access network (AN) [access point (AP) / access point controller (APC)] to forward traffic channels and reverse power control channels. A request is made to assign a Power Control Channel, a Reverse Traffic Channel, and is also allocated (d).

If a predetermined session does not exist between the access terminal (AT) and the access network (AN) [access point (AP) / access point controller (APC)], the procedure for establishing a session is performed (e). (AN) [Access Network (AP) / Access Point Controller (APC)] sends A9-Setup-A8 to the Packet Control Function (PCF) for setting up the A8 connection and drives the timer TAS-Setup ( f).

Then, the access terminal (AT) sends a Xon Request message for requesting a transition to an open state to an access network (AN) [access point (AP) / access point controller (APC)] (g) An access network (AN) [access point (AP) / access point controller (APC)] transmits an XonResponse message in response to the XonRequest message (h).

When all the setting procedures for the session are completed, the access terminal (AT) performs a point-to-point (PPP) and link control protocol (LCP) procedure to perform the authentication procedure (i). .

First, the access network (AN) [access point (AP) / access point controller (APC)] generates a challenge handshake authentication protocol (CHAP) challenge packet defined in RFC 1994 and transmits it to the access terminal (AT) (j). In addition, after receiving the CHAP Response packet from the AT (Access Terminal), and transmits a RADIUS Access-Request message to the Access Network (AN) -Authentication, Authentication and Accounting (AAA) (k).

Then, the Access Network (AN) -AAA (Authentication, Authentication and Accounting) performs an authentication procedure and, if successful, transmits an Access-Accept message (l), and this Access-Accept message sends an MN ID of 15 Digit. Include.

Then, an access network (AN) (access point (AP) / access point controller (APC)] informs the access terminal (AT) that the CHAP authentication is successful (m), and the access terminal (AT) transitions to the open state. Transmits an XonRequest message requesting an AN to an access network (AN) [access point (AP) / access point controller (APC)] (n) and, accordingly, an access network (AN) [access point (AP) / access point (APC)] Controller]] transmits an XonResponse message, which is a response to the XonRequest message, to the AT (o).

After receiving the A9-Setup-A8 message, the Packet Control Function (PCF) performs an A10 / A11 connection establishment procedure and an A8 connection establishment with a packet data serving node (PDSN) (P).

The access network (AP) / access point controller (AP) receives an A9-Connect-A8 message from a packet control function (PCF) and cancels the driven timer TA8-Setup (q). When the A10 / A11 connection setup is completed, a PPP (Point to Point Protocol) setup procedure is performed, and packet data is transmitted / received between an access terminal (AT) and a packet data serving node (PDSN).

Referring to FIG. 5, a 1xEV forward link data transmission method for a case where a session exists is present. In a connection setup procedure, an access terminal (AT) is an access network (AN) [access point (AP) / access point (APC). Controller]] requires and is assigned a forward traffic channel, a reverse power control channel, and a reverse traffic channel for communication (a).

Then, the AN (Access Network) [Access Point (AP) / Access Point Controller (APC)] sends the A9-Setup-A8 to the Packet Control Function (PCF) for establishing the A8 connection, and the timer TA8-Setup. Drive (a, b).

Then, the AN (Access Point) / AP (Access Point Controller) receives the A9-Connect-A8 message from the Packet Control Function (PCF) and runs the timer TA8-Setup (A8 interface). (C) After canceling the timer for the message for establishing the channel in (c), the access terminal (AT) and the packet data serving node (PDSN) transmit / receive data with each other (d).

As described above, the forward link data transmission method of mobile communication has a problem in that the data rate on the forward link is changed due to the channel capacity and the propagation environment of the base station, thereby failing to stably transmit data at a constant data rate.

The present invention has been made to solve the above problems, it is possible to efficiently transmit data to a constant data rate through the negotiation of the base station and the terminal of the data rate on the forward link that changes due to the channel capacity and the propagation environment of the base station The purpose of the present invention is to provide a forward link data transmission method of a mobile communication.

1 is a diagram showing an example of a modulation scheme and a packet data size table corresponding to data rate values.

Figure 2 shows an example of a 1xEV-DO data rate control signal magnitude table.

FIG. 3 shows an example of a mapping table of data rates versus C / I for guaranteeing 1% PER (Packet Error Rate). FIG.

Figure 4 is a schematic diagram showing the operation of one embodiment of a method for forward link data transmission in a conventional mobile communication.

Figure 5 is a schematic diagram showing the operation of one embodiment of a method for forward link data transmission in a conventional mobile communication.

Figure 6 is a schematic diagram showing the operation of the forward link data transmission method of the present invention mobile communication.

FIG. 7 is a diagram showing the configuration of a DATa RATe Request message in FIG. 6; FIG.

FIG. 8 is a diagram showing the configuration of a DATa RATe Response message in FIG. 6; FIG.

The present invention for achieving the above object, in the forward link data transmission method of mobile communication, between the AT (Access Terminal) and AN (Access Network) (Access Point (AP) / Access Point Controller (APC)] When the traffic channel is completed, the AT transmits a Data Rate Request message to an access network (AN) (access point / access point controller) to request a certain data rate. And transmitting, by the Access Network (AN) [Access Point (AP) / Access Point Controller (APC)], a Data Rate Response message for the data rate requested by the Access Terminal (AT). It is characterized by.

The Data Rate Request message includes a message ID area in which a message ID for distinguishing a message is written, a message sequence area in which a message sequence value is written, a data rate area in which a requesting data sheet is written, and an AT (Access). Terminal) consists of a reserved area set to '0'.

The Data Rate Response message includes a message ID area for classifying a message, a message sequence area for writing a value of a message sequence area of a Data Rate Request message, and data for writing whether or not to accept a data rate service requested by an access terminal (AT). The rack accept area, the data area in which the maximum data rate that the AN (Access Network) can currently service is written, and the reserved area set to '0' by the AN (Access Network).

Hereinafter, the operation and effect of the forward link data transmission method of the mobile communication according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 6 is a schematic diagram showing an operation of an embodiment of a method for transmitting a forward link data of a mobile communication according to the present invention, which is the same as in FIG. 1 except that an AN (Access Network) [AP (Access Point) / APC (Access Point Controller)] transmits A9-Setup-A8 to a Packet Control Function (PCF) for establishing an A8 connection and drives a timer TAS-Setup; Transmitting, by an access terminal (AT), a Data Rate Request message to an access network (AN) [access point (AP) / access point controller (APC)] to request a value of a constant data rate; The access network (AN) [Access Point (AP) / Access Point Controller (APC)] further comprises the step of transmitting a data rate response message for the data rate requested by the access terminal (AT), such as The operation of the present invention will be described.

First, in the case of a new session, the access terminal (AT) sends an UATI-Request message requesting the assignment of a unicast access terminal identifier (AN) [Access Network (AP)]. ) / APC (Access Point Controller)].

The Access Network (AP) / Access Point Controller (AP) assigns a UATI and transmits a corresponding UATI-Assignment message to an access terminal (AT), whereby the access terminal (AT) A UATI-Complete message for notifying that the UATI-Assignment message has been received is transmitted to the AN (Access Network) (Access Point (AP) / Access Point Controller (APC)].

Thereafter, the access terminal (AT) communicates with an access network (AN) [access point (AP) / access point controller (APC)] to forward traffic channel and reverse power control channel. Power Control Channel, Reverse Traffic Channel is required and assigned.

If a predetermined session does not exist between the access terminal (AT) and the access network (AN) [access point (AP) / access point controller (APC)], a procedure for establishing a session is performed. (Access Network) [AP (Access Point) / APC (Access Point Controller)] transmits A9-Setup-A8 to the Packet Control Function (PCF) and drives the timer TAS-Setup to establish the A8 connection.

At this time, when the traffic channel between the access terminal (AT) and the access network (AN) [access point (AP) / access point controller (APC)] is completed, the access terminal (AT) requests a value of a certain data rate. In order to do this, a Data Rate Request message is transmitted to an access network (AN) [access point (AP) / access point controller (APC)].

As shown in FIG. 7, the Data Rate Request message has a message ID area set to 0x00 by the AT (Access Terminal) and a message sequence that is increased by '1' from the message sequence value of the recently sent Data Rate Request message. An area, a data rate area set by a table preset by an access terminal (AT) and a reserved area set to '0' by an access terminal (AT) according to a requested data rate.

Then, the access network (AN) (access point (AP) / access point controller (APC)) transmits a data rate response message for the data rate requested by the access terminal (AT).

As shown in FIG. 8, the Data Rate Response message includes a message ID area set to 0x00 by the AN (Access Network) and a message sequence area of the Data Rate Request message by the AN (Access Network). The message sequence area to be set, the data plate accept area to be set by the AN (Access Network) to inform the AT (Access Terminal) of the maximum data rate currently available to service, and the AN (Access Network) In order to inform the AT (Access Terminal) of the maximum serviceable data rate, it is composed of a data rate area set by a predetermined table and a reserved area set to '0' by an access network (AN).

Then, when the A9-Connect-A8 configuration is completed, the access terminal (AT) sends an XonRequest message for requesting a transition to the open state (Access Network) [AP (Access Point) / APC (Access). Point Controller (G)], and an access network (AN) (Access Point / AP) sends an XonResponse message in response to the XonRequest message.

When all the setting procedures for the session are completed, the access terminal (AT) performs a point-to-point (PPP (Point to Point Protocol)) and a Link Control Protocol (LCP) procedure to perform the authentication procedure.

First, an access network (AN) [access point (AP) / access point controller (APC)] generates a challenge handshake authentication protocol (CHAP) challenge packet defined in RFC 1994 and transmits it to an access terminal (AT). After receiving CHAP Response packet from AT, it transmits RADIUS Access-Request message to Access Network (AN) -Authentication, Authentication and Accounting (AAA).

Then, the access network (AN) -Authentication, Authentication and Accounting (ANA) performs an authentication procedure and, if successful, transmits an access-accept message. The access-accept message includes an MN ID of 15 digits.

Then, the access network (AN) (access point (AP) / access point controller (APC)) informs the access terminal (AT) that the CHAP authentication is successful, and the access terminal (AT) requests a transition to the open state. The XonRequest message is transmitted to an access network (AN) [access point (AP) / access point controller (APC)], and accordingly, the access network (AN) [access point (AP) / access point controller (APC)] transmits the AT. Sends an XonResponse message, which is a response to an XonRequest message, to an Access Terminal.

After receiving the A9-Setup-A8 message, the Packet Control Function (PCF) performs an A10 / A11 connection establishment procedure and an A8 connection establishment with a packet data serving node (PDSN).

The AN (Access Point) / AP (Access Point Controller) receives an A9-Connect-A8 message from a Packet Control Function (PCF) and cancels the driven timer TA8-Setup, followed by A10 / When the A11 connection setup is completed, a PPP (Point to Point Protocol) setup procedure is performed, and packet data is transmitted / received between the access terminal (AT) and the packet data serving node (PDSN) according to the data rate set above. .

The specific embodiments or examples made in the detailed description of the present invention are for the purpose of clarifying the technical contents of the present invention only, and should not be construed as limited to these specific embodiments by consultation, and the spirit of the present invention and the claims Various changes can be made within the scope of.

As described in detail above, the present invention has an effect of stably transmitting data to a constant data rate through negotiation between the base station and the terminal of the data rate on the forward link, which varies due to the channel capacity and the propagation environment of the base station.

In addition, there is an effect of efficiently implementing the QoS and scheduling functions of the base station by charging by combining the data data and the amount of data used differentially provided according to the user receiving the mobile communication service.

Claims (5)

In the forward link data transmission method of mobile communication, When the traffic channel between the access terminal (AT) and the access network (AN) [access point (AP) / access point controller (APC)] is completed, the access terminal (AT) requests a value of a constant data rate. Transmitting a Data Rate Request message to an access network (AN) [access point (AP) / access point controller (APC)]; And transmitting, by the access network (AN) [access point (AP) / access point controller (APC)], a data rate response message for the data rate requested by the access terminal (AT). Forward link data transmission method of mobile communication. The method of claim 1, wherein the Data Rate Request message, A message ID field in which a message ID for distinguishing a message is written; A message sequence area in which the message sequence value is written; A data rate area in which the requesting data rate is written; A method of forward link data transmission in a mobile communication, comprising a reserved area set to '0' by an AT (Access Terminal). The method of claim 2, wherein the message sequence value, A method of forward link data transmission in a mobile communication, characterized in that a value increased by '1' from a message sequence value of a recently sent Data Rate Request message. The method of claim 2, wherein the data rate, A method of forward link data transmission in a mobile communication, characterized in that set by a table preset by an access terminal (AT). The method of claim 1, wherein the Data Rate Response message A message ID area for separating messages, A message sequence area in which the value of the message sequence area of the Data Rate Request message is written; A data rate accept area for writing whether the data terminal service is accepted by the access terminal (AT); A data rate area in which the largest data rate that an access network (AN) can currently service is written; A method of forward link data transmission in a mobile communication, comprising a reserved area set to '0' by an access network (AN).