KR20000060620A - Method of supporting multi-port of network terminal in wireless local loop - Google Patents

Abstract

PURPOSE: A method for supporting a multiple-port of a NT(Network Terminal) of a WLL(Wireless Local Loop) is provided to remove a consumption to a TRCH(Traffic Channel) by setting two TRCH links using one modem in the NT of the WLL. CONSTITUTION: A radio control system transmits a paging message to a NT through a SBCCH(Slow Broadcasting Channel) for setting a call in the case that a communication channel is not set between the NT and the radio control system(s11). The NT transmits a channel allocating request message to the radio control system through an AXCH(Access Channel) for requesting a channel allocation(s12). The radio control system transmits the channel allocation message to the NT through a CTCH(Control Channel) for the channel allocation(s13). The NT transmits a channel resource and a TRCH/SGCH(Signal Channel) for a traffic channel conversion to a modem(s14).

Description

Multi-port support method of subscriber access device in wireless subscriber network {METHOD OF SUPPORTING MULTI-PORT OF NETWORK TERMINAL IN WIRELESS LOCAL LOOP}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a subscriber station (Network Terminal) of a wireless local loop (WLL), in particular one subscriber access to a media access control (MAC) layer of a subscriber access device. The present invention relates to a multi-port supporting method of a terminal station in a wireless subscriber network, which adds a function for enabling a device to support a plurality of subscriber equipments.

A wireless subscriber network connects a subscriber network between a subscriber equipment and a local exchange using an air interface. To this end, a subscriber station (Network Terminal: NT) is connected to the subscriber station, and a wireless control system is connected to the exchanger side to perform communication by a wireless interface between the subscriber station and the base station.

In each of the subscriber access device and the wireless control system, the channel access control for the wireless interface is a media access control layer (MAC layer). Control pear-to-pear messages.

To this end, the media access control layer of the subscriber access device controls the channel assignment for the air interface by controlling the modem of the subscriber access device. A conventional subscriber access device using broadband Code Division Multiple Access (CDMA) technology is configured to connect only one subscriber device per modem.

1 is a flowchart illustrating a message between a subscriber access device and a wireless control system according to the prior art. As shown in FIG. 1, peer-to-peer messages such as paging, channel allocation request, channel allocation, and the like for radio resource setting are represented by a subscriber. It is exchanged through SBCCH (Slow BroadCasting CHannel), AXCH (Access CHannel), and CTCH (ConTrol CHannel), which are overhead channels between the MAC layer 10 of the access device and the MAC 30 of the radio control system.

The subscriber access device includes only one modem, and since the channel assignment for the traffic channel (TRCHic CHannel: TRCH) is fixed, there is no need to distinguish physical channels in the message parameters transmitted to the modem.

That is, when the paging message is transmitted to the subscriber access device 10 through the SBCCH, which is an overhead channel for call setup, in the radio control system 30 (s1), the subscriber access device 10 receives an overhead for requesting channel allocation. The channel assignment request message is transmitted to the radio control system 30 through the channel AXCH. (S2)

When the radio control system 30 transmits a channel assignment message to the subscriber access device 10 through the CTCH for channel assignment (s3), the subscriber access device 10 commands the modem to switch traffic channels. (s4).

The message exchange procedure is performed at the MAC layer of the subscriber access device 10 and the radio control system 30.

As described above, in the conventional subscriber access apparatus, only one subscriber apparatus can be connected to one modem, which wastes a traffic channel (TRCH) that the modem can support. In addition, in order to increase the number of subscriber devices connected to the subscriber access device, a burden arises in that the number of modems in the subscriber access device or the number of subscriber access devices must be increased.

This is very inefficient in terms of cost because the price of the modem is a big part of the price of the subscriber access device. In addition, since a single signal mode channel is used for a subscriber access device having a modem, there is a problem in that wireless capacity is inefficient when the number of subscriber devices is increased.

The present invention was devised to solve the problems of the prior art operating as described above, and by setting up two traffic channel (TRCH) links using one modem in a subscriber low speed device of a wireless subscriber network. It is an object of the present invention to provide a multi-port support method of a subscriber access device in a wireless subscriber network to remove waste of TRCH.

1 is a message flow diagram between a conventional MAC and a modem in a subscriber access device in setting up a conventional radio resource.

2 is a message flow diagram between a MAC and a modem in a subscriber access device in setting up a radio resource for establishing a call channel when there is no call channel link according to the present invention.

3 is a message flow diagram between a MAC and a modem in a subscriber access device in setting up a radio resource for establishing another call channel after performing FIG. 2;

<Explanation of symbols for main parts of drawing>

10, 100: subscriber access device 20, 200: wireless control system

30, 300: modem

In the embodiment of the multi-port support method of the subscriber access device in the wireless subscriber network according to the present invention, which is invented to achieve the above object, a call channel is established between the subscriber access device of the wireless subscriber network and the wireless control system. If not, transmitting, by the radio control system, a paging message to the subscriber access device through a slow broadcast channel (SBCCH) for call setup (s11);

Transmitting, by the subscriber access device receiving the paging message, a channel allocation request message to the radio control system (MAC) through an access channel (AXCH) for channel allocation request (s12);

Transmitting, by the radio control system receiving the channel allocation request message, a channel allocation message to the subscriber access device through a control channel (CTCH), which is an overhead channel for channel allocation (s13); And

The subscriber access device receiving the channel assignment message transmits channel resources and TRCH / SGCH (SiGnal CHannel) to the modem for switching the traffic channel (s14).

In another embodiment of the method for supporting a multi-port of a subscriber access device in a wireless subscriber network according to the present invention, a call channel and a signal channel are preset using a modem between the subscriber access device and a wireless control system of a wireless subscriber network. Transmitting, by the radio control system, a paging message to the subscriber access device through the signal channel for call establishment (s15);

A subscriber access device receiving the paging message, transmitting a channel assignment request message to the radio control system through the signal channel (s16);

Transmitting, by the wireless control system, the channel assignment request message to the subscriber access device through the signal channel (s17); And

Receiving, by the subscriber access device receiving the channel assignment message, an ID of the channel element, which is a channel resource, and traffic modem information to the modem in order to establish an additional traffic channel using the one modem for the call establishment ( s18).

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

This method allows two subscribers to talk by using two channels of four channel resources in one modem, so that one subscriber can use one signaling channel and two traffics in MAC layer of subscriber access device. The process of establishing a channel, the process of using multiple modems in one subscriber access device (MAC), the process of delivering a message through a signal channel when setting up a second call, and the digital signal processing processor in the MAC layer Processor: It consists of the process of inputting parameters for classifying resources of a channel in a message to DSP.

The operation and effects thereof will be described in detail with reference to FIGS. 1 to 2 as follows.

According to the present invention, two traffic channels are shared by another traffic channel (OWCH), which is a type of signal channel, so that the subscriber access device operates as a multi-signal mode channel. In the multi-signal mode, when the first call setup request is received, the signal channel (OWCH) and the traffic channel (TRCH) are set, and if there is a call setup request for another subscriber station, only the setup of additional traffic channels through the signal channel is performed. This allows the call to be made directly through the added traffic channel.

As described above, in order to be able to configure the traffic channel individually for each subscriber device, the modem setting value for each traffic channel is changed by adding parameters in a message exchanged for channel setting.

2 is a flowchart illustrating a message for establishing a talk channel when there is no talk channel link according to the present invention, and FIG. 3 is a flowchart illustrating a message for establishing another talk channel after performing FIG. 2.

As shown in FIG. 2 and FIG. 3, one subscriber access device (MAC) establishes 2N traffic channels using N signal channels, that is, a signal channel. If there is no subscriber set up in the MAC, the call setup attempt is the same as before.

However, by classifying a modem that requires call setup among a plurality of modems in the MAC layer, a message for switching traffic channels and signaling channels to ASIC (Application Specific Integrated Circuits) constituting the modem requiring call setup. Implement the ability to handle.

The parameter of the message contains the value for the channel resource (Celd). In this case, if a call setup is requested from another subscriber device connected to the same subscriber access device (MAC) while the call is established, peer-to-peer messages such as paging, channel assignment request, channel assignment, and the like are sent from the subscriber access device (MAC). It is transmitted through a signal channel between the MAC layer and the MAC layer in a radio control system (MAC).

The MAC layer classifies a modem requiring call setup among a plurality of modems, and switches the traffic channel to the modem requiring call setup. In addition, the message parameter is a value for the channel resource.

Hereinafter, a method according to the present invention will be described with reference to FIG. 2.

When the call channel is established when there is no call channel link, the wireless control system 300 transmits a paging message to the subscriber access device (MAC) 100 through SBCCH, which is an overhead channel for call setup (S11).

Then, the subscriber access device (MAC) 100 transmits a channel allocation request message to the radio control system (MAC) 300 through AXCH, which is an overhead channel for the channel allocation request (S12).

The wireless control system (MAC) 300 transmits a channel assignment message to the subscriber access device (MAC) 100 via CTCH, which is an overhead channel for channel allocation (s13), and the subscriber access device (MAC) 100 ) Transmits the channel information, that is, channel identifier (CeId) and TRCH / SGCH (SiGnal CHannel), to the modem 200 to switch the traffic channel (S14).

On the other hand, if an additional call channel is established while the call channel is already established, as shown in FIG. 3, the wireless control system (MAC) 300 receives a paging message through a signal channel for call setup. (MAC) 100 to transmit (s15).

Then, the subscriber access device (MAC) 100 transmits a channel allocation request message to the radio control system (MAC) 300 through the signal channel (s16).

The wireless control system (MAC) 300 transmits a channel assignment message to the subscriber access device (MAC) 100 through the signal channel (s17), and receives the channel assignment message (MAC) 100. In order to switch the traffic channel, and transmits the information (CeId) and the traffic channel information of the channel to the modem (200) (s18).

As described in detail above, the present invention lowers the price per line by doubling the number of subscriber devices that can be connected to one subscriber access device, and the signal channels are two traffic pack channels. By using it in common, the wireless capacity can be increased.

Claims (5)

When the call channel is not established between the subscriber access device of the wireless subscriber network and the wireless control system, transmitting a paging message to the subscriber access device through a slow broadcast channel (SBCCH) for call setup. Wow; Transmitting, by the subscriber access device receiving the paging message, a channel allocation request message to the radio control system (MAC) through an access channel (AXCH) for channel allocation request; Transmitting, by the radio control system receiving the channel allocation request message, a channel allocation message to the subscriber access device through a control channel (CTCH), which is an overhead channel for channel allocation; And And transmitting, by the subscriber access device receiving the channel assignment message, a channel resource and TRCH / SGCH (SiGnal CHannel) to a modem for switching a traffic channel to a modem. The method of claim 1, wherein the transmitting of the channel resource and TRCH / SGCH to a modem comprises: And transmitting a channel element identifier (CeId) of a channel element corresponding to a channel allocated for the call setup, to the modem. The method of claim 2, wherein the transmitting of the channel resource and TRCH / SGCH to a modem comprises: And classifying a modem for which call establishment is required among a plurality of modems in the subscriber access device. The method of claim 3, wherein the step of classifying the modem for which call establishment is required is: And forming a traffic channel switch and a signal channel switch message and an application specific integrated circuit (ASIC) using a modem requiring call setup. When a call channel and a signal channel are preset using a modem between a subscriber access device of a wireless subscriber network and a wireless control system, the wireless control system sends a paging message through the signal channel for call setup. Transmitting to a connection device; A subscriber access device receiving the paging message, transmitting a channel allocation request message to the radio control system through the signal channel; Receiving, by the wireless control system, the channel assignment request message, the channel assignment message to the subscriber access device through the signal channel; And The subscriber access device receiving the channel assignment message transmits the ID and traffic modem information of a channel element, which is a channel resource, to the modem in order to establish an additional traffic channel using the one modem for the call setup. A method for supporting multiple ports of a subscriber access device in a wireless subscriber network.