KR20000060618A - Method for distinguishing link connection of communication control plane in wireless local loop - Google Patents

Abstract

PURPOSE: A method for identifying link connections of a signalling plane in a wireless local loop(WLL) is provided to identify simultaneous service requests of multi subscribers in an upper layer, by making a data link manager of a radio interface unit(RIU) receive a link connection identifier and a subscriber identifier from a radio port to inform the upper layer of the link connection identifier and the subscriber identifier. CONSTITUTION: A layer3 of a radio port(RP) in a wireless local loop(WLL) transmits a message for requesting a link connection of a signalling plane to a layer2 which is a data link manager of the RP. The layer2 transmits a message for requesting an identifying/monitoring frame delivery including a user identifier(UID) to a layer1 of the RP. The layer1 transmits the message of the layer2 to a layer1 of a radio interface unit(RIU) through an air interface. The layer1 of the RIU transmits the message of the layer1 of the RP to the layer2. The layer2 reports a message for setting up a link to a layer3 of the RIU. The layer2 transmits the message for requesting the identifying/monitoring frame delivery to the layer1 of the RIU. The layer1 of the RIU transmits an identifying/monitoring frame to the layer1 of the RP. The layer1 of the RP transmits a message including the identifying/monitoring frame to the layer2 of the RP. The layer2 transmits a link setup completing message to an application(AP)/layer3 of the RP.

Description

{METHOD FOR DISTINGUISHING LINK CONNECTION OF COMMUNICATION CONTROL PLANE IN WIRELESS LOCAL LOOP}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless local loop (WLL), and in particular, a radio resource control signal using a user identifier (UID) when multiple subscribers matched to a terminal station operating in a single mode simultaneously attempt a call. The present invention relates to a link connection classification method of a communication control signal plane for distinguishing link connections of a signaling plane.

The wireless subscriber network applies an air interface between a subscriber equipment and a local exchange. To this end, the subscriber station connects a radio station unit (RIU) to the subscriber station and a radio port (RP) to the exchange side to perform wireless communication between the terminal station and the base station.

According to the domestic wireless access standard of the WLL system using the Code Division Multiple Access (CDMA) method, the WLL Communication Control Plane which is in charge of bearer connection control and call control of the system (WLL-Plane) connection is established when establishing a data link between the terminal station and the base station. The layer 2 corresponding to the data link management unit in the terminal station and the base station transmits and receives a RR (Receive Ready) frame having a response and a supervisory function for the link connection of the communication control signal plane according to the conventional domestic standard. .

1 shows an address field of a conventional communication control signal plane data link frame and a control field of an acknowledgment and supervisory frame, using an RR frame having a structure as shown in FIG. A data link manager that satisfies the standard classifies a link connection between a terminal station and a base station using a DLCI (Data Link Connection Identifier).

When the link connection setting is requested, the data link manager of the communication control signal plane attempts to establish the link connection by setting EST_FLAG in the control field shown in FIG. 1 to 1 in response thereto. Referring to a flowchart illustrating a conventional link connection setting method of FIG.

When the application / layer 3 (11) in the base station sends an APL2_EST_REQ command to the base station's layer 2 (s1) (s1), the layer 2 (11) sends a PH_DATA_REQ command having a response and monitoring function to the base station's layer 1 ( 13) (s2).

Layer 1 (13) of the base station sends an RR (Receive Ready) command for link classification to layer 1 (21) of the terminal through the air interface (s3). Then, the layer 1 (21) of the terminal station sends a PH_DATA_IND command having a response and a monitoring function to the layer 2 (22) of the terminal station (s4), and the APL2_EST_IND command for link classification at the layer 2 (22) of the terminal station. It sends to the AP / layer 3 (23) (s5), and sends the response and monitoring function request command PH_DATA_REQ to the layer 1 (21) (s6).

Then, an RR command is transmitted from the layer 1 (21) to the layer 1 (13) in the base station (s7), and a PH_DATA_IND command is sent from the layer 1 (13) in the base station to the layer 2 (12) (s8). The APL2_EST_REQ command is transmitted from the layer 2 (12) to the AP / layer 3 (11) (s9).

Although the link classification method using the DLCI as described above is effective for link management after sequential link access and link establishment, there may be cases where the access classification is unclear.

That is, when several subscriber devices connected to a terminal station operating in one single signal mode attempt a call at the same time or at short intervals, the radio resource request order and link connection order of each subscriber device are abnormal in the wireless environment or other. The cause of the mismatch is due to the loss or delay of the message.

Accordingly, the prior art operating as described above has a problem in that the data link manager cannot accurately connect the subscriber device and the corresponding link, thereby failing to provide a service to the subscriber.

The present invention has been made to solve the problems of the prior art operating as described above, when establishing a link between the terminal station and the base station, the data link management unit of the terminal station receives the link access identifier and subscriber identifier from the base station, It is an object of the present invention to provide a link access classification method of a communication control signal plane in a wireless subscriber network for notifying a higher layer, and a higher layer classifying and processing simultaneous service requests of multiple subscribers based on the above information.

1 is an address field of a conventional communication control signal plane data link frame and a control field of an acknowledgment and monitoring frame;

2 is a conventional link establishment flowchart.

3 is a communication control signal plane confirmation and surveillance frame format according to the present invention.

4 is a flowchart for establishing a link according to the present invention.

<Explanation of symbols for main parts of drawing>

10, 100: base station 11, 23, 101, 203: AP / layer 3

12, 22, 102, 202: Tier 2 13, 21, 103, 201: Tier 1

20, 200: Terminal station 30: Subscriber identifier

Embodiment of the method for distinguishing the link connection of the communication control signal plane in the wireless subscriber network according to the present invention, which was created to achieve the above object,

Transmitting, by layer 3 of the base station of the wireless subscriber network, a message requesting link connection of the communication control signal plane to layer 2, which is a base station data link management unit (s11);

A layer 2 receiving the link connection, transmitting a confirmation and supervision frame transmission request message including a user identifier (UID) in a control field to the layer 1 of the base station (s12);

Step (s13), by layer 1 of the base station receiving the confirmation and surveillance frame transmission request message, transmitting the message received from layer 2 to layer 1 of the terminal station through an air interface;

Transmitting, by layer 1 of the terminal station, the message received from layer 1 of the base station to layer 2, which is a terminal station data link management unit (s14);

The terminal station layer 2 receiving the message reports a message for link establishment to the terminal station layer 3 (s15);

After reporting the link establishment, the terminal station layer 2 forwarding a message requesting confirmation and supervision frame transmission to the terminal station layer 1 to inform the base station of the link establishment (s16);

The terminal station layer 1 receiving the message transmits an acknowledgment and surveillance frame to the base station layer 1 (s17);

(S18), by the base station layer 1 receiving the transmitted message, transmitting a message including the confirmation and surveillance frame to the base station layer 2; And

The base station layer 2 receiving the message includes the step of delivering a link establishment complete report message to the base station AP / layer 3 (s19).

Hereinafter, described in detail with reference to the accompanying drawings, preferred embodiments of the present invention.

3 is a confirmation and monitoring frame format of the communication control signal plane according to the present invention. As shown in the drawing, the present invention is not used in the control field of the confirmation and monitoring (RR) frame of the existing communication control signal plane. 2, 3, and 4 bits are used by a user identifier (UID) 30. The operation and effects thereof will be described in detail with reference to FIGS. 3 to 4 as follows.

FIG. 4 is a flowchart illustrating a link establishment according to the present invention. As shown in FIG. 4, a layer 3 of a base station of a wireless subscriber network delivers a message requesting a link connection of a communication control signal plane to a layer 2 which is a base station data link manager. (s11); A layer 2 receiving the link connection, transmitting a confirmation and supervision frame transmission request message including a user identifier (UID) in a control field to the layer 1 of the base station (s12); Step (s13), by layer 1 of the base station receiving the confirmation and surveillance frame transmission request message, transmitting the message received from layer 2 to layer 1 of the terminal station through an air interface; Transmitting, by layer 1 of the terminal station, the message received from layer 1 of the base station to layer 2, which is a terminal station data link management unit (s14); The terminal station layer 2 receiving the message reports a message for link establishment to the terminal station layer 3 (s15); After reporting the link establishment, the terminal station layer 2 forwarding a message requesting confirmation and supervision frame transmission to the terminal station layer 1 to inform the base station of the link establishment (s16); The terminal station layer 1 receiving the message transmits an acknowledgment and surveillance frame to the base station layer 1 (s17); (S18), by the base station layer 1 receiving the transmitted message, transmitting a message including the confirmation and surveillance frame to the base station layer 2; And the base station layer 2 receiving the message, delivering a link establishment completion report message to the base station AP / layer 3 (s19). The operation and effects thereof will be described in detail as follows.

Layer 3 (101) of the base station transmits an APL2_EST_REQ message including a subscriber identifier (UID) 30 to request layer 2 102, which is a data link management unit of the base station, to connect to the communication control signal plane. Send to layer 2 (102) (s11).

The base station layer 2 102, which has been requested to set up a link, loads the subscriber identifier 30 received from the base station AP / layer 3 in the subscriber identifier 30 portion of the control field of the acknowledgment and supervision frame. A PH_DATA_REQ message requesting confirmation and surveillance frame transmission is transmitted (s12). Then, the base station layer 1 103 transmits the message RR received from the layer 2 102 to the layer 1 201 of the terminal station (s13).

The terminal station layer 1 201 transfers the message PH_DATA_IND received from the base station layer 1 103 to the layer 2 202 which is the terminal station data link management unit (s14). The terminal station layer 2 (202) obtains the link identifier from the address field of the confirmation and supervision frame for link establishment shown in FIG. 3, and also obtains the subscriber identifier (30) from the control unit field of the frame. The layer 3 203 of the station is informed of the obtained link identifier and subscriber identifier 30 using the APL2_EST_IND message (S15).

In a single mode operation in which multiple subscribers matched to a terminal station have respective signaling and traffic channels, the AP / layer 3 203 of the terminal station is a link identifier and a subscriber identifier as reported from the layer 2 202 which is a data manager. Multiple subscribers can be identified using 30, and a link can be accessed for each multiple subscriber.

After the terminal station layer 2 202 reports the link establishment to the layer 3 203 in step (s14), the layer 2 202 sends a PH_DATA_REQ message requesting transmission of a confirmation and supervision frame to inform the base station of the link establishment. Send to layer 1 (201) (s16). The layer 1 201 of the terminal station transmits an acknowledgment and surveillance frame to the base station layer 1 103 (s17).

The base station layer 1 (103) transmits a PH_DATA_IND message to the base station layer 2 (102) for the acknowledgment and supervision frame arrived from the terminal station layer (1). Base station layer 2 (102) then reports completion of link establishment to base station AP / layer 3 (101) using the APL2_EST_REQ message. By the above procedure, the link connection of the communication control signal plane capable of providing a service to the subscriber is completed.

As described in detail above, the present invention adds the subscriber classification function to the link connection classification function of the current standard at the time of link connection, thereby distinguishing and processing simultaneous service requests from multiple subscriber devices connected to one terminal station. It has an effect.

Claims (4)

Transmitting, by layer 3 of the base station of the wireless subscriber network, a message requesting link connection of a communication control signal plane to layer 2, which is a base station data link management unit; The layer 2 receiving the link connection, transmitting a confirmation and supervision frame transmission request message including a user identifier (UID) in a control field to the layer 1 of the base station; A layer 1 of the base station receiving the confirmation and surveillance frame transmission request message and forwarding the message received from the layer 2 to the layer 1 of the terminal station through an air interface; Transmitting, by layer 1 of the terminal station, the message received from layer 1 of the base station to layer 2, which is a terminal station data link management unit; The terminal station layer 2 receiving the message reports a message for link establishment to terminal station layer 3; After reporting the link setting, the terminal station layer 2 forwarding a message requesting confirmation and supervision frame transmission to the terminal station layer 1 to inform the base station of the link setting; The terminal station layer 1 receiving the message transmits an acknowledgment and surveillance frame to the base station layer 1; The base station layer 1 receiving the transmitted message, forwarding a message including the confirmation and watch frame to the base station layer 2; And And transmitting, by the base station layer 2 receiving the message, a link establishment completion report message to the base station AP / layer 3, the link access classification method of a communication control signal plane in a wireless subscriber network. The method of claim 1, wherein the transmitting of the message requesting the link connection of the communication control signal plane to the base station layer 2 by the layer 3 of the base station comprises: transmitting the message including a subscriber identifier; A method for distinguishing link access of communication control signal plane in wireless subscriber network. The method of claim 2, wherein the terminal station layer 2 reports the message for link establishment to the terminal station layer 3, The terminal station layer 2 obtains the link separator from the address field of the confirmation and supervision frame for link establishment, obtains the subscriber identifier from the control field, and uses the message to the layer 3 of the terminal station to obtain the link identifier. And a step of reporting the identifier and the subscriber identifier. 4. The method of claim 3, wherein each of the plurality of subscriber stations matched to the terminal station has a unique signal channel and a traffic channel, and the AP / layer 3 of the terminal station is identical to the link identifier reported from the terminal station layer 2. And using the subscriber identifier to connect a unique link to each of the plurality of subscriber devices.