Customer premise network equipment and data communication...

Details Customer premise network equipment and data communication... Customer premise network equipment and data communication...

1998-08-13

2002-05-14

Chin, Wellington (Department: 2664)

Multiplex communications

Pathfinding or routing

Switching a message which includes an address header

C370S469000, C370S539000

Reexamination Certificate

active

06389020

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a customer premise network equipment and a data communication method based on a single ring configuration, and in particular, to an improved customer premise network equipment and a data communication method based on a single ring configuration which are capable of providing a low cost broad band service for a personal customer and a small size business office by configuring a plurality of terminal networks based on a single ring network.
2. Description of the Prior Art
As the communication technology is advanced, a B-ISDN (Broadband Integrated Service Digital Network) of an ATM method is used so that a burst service of a real time video signal transmitting and receiving operation having a high speed data transmission and variable bit rate such as a continuous service for an audio or video signal is implemented in the identical link.
The development of the equipment for configuring the above-described B-ISDN is focussed on a medium size equipment which is capable of providing a broadband service for a large capacity switch operation and private network and a plurality of areas rather than for the equipment capable of providing a service to a customer premise network or a subscriber. Most of the above-described equipments are developed in a switch structure for being adapted to a traffic transmitting and receiving operation between areas in which a large input and output capacity is needed. However, the above-described equipments have the following problems for being used for a customer premise or a small size business office compared to a multi-access configuration of a ring or bus structure.
First, when the equipment of a switch structure is connected with each service terminal by a transmission line, since the switch should be connected with each terminal one-to-one, the transmission line is increased compared to the ring or bus type for thereby increasing a fabrication cost of the system.
Second, since a complicated switch structure is used, it is difficult to maintain and manage the system compared to a simple multi-access equipment or a ring type equipment.
Third, when it is needed to increase the system of an input port, in the multi-access, the terminal is installed between the previous terminal or a terminal and another terminal. However, in the switch type access, since the port should be installed by the switch unit for increasing the system of the port, a fabrication cost is increased.
The conventional customer premise network equipment will be explained with reference to the accompanying drawings.
FIG. 1
is a view illustrating the construction of a one-to-one type customer premise network in the conventional art, and
FIG. 2
is a block diagram illustrating a one-to-one type customer premise network equipment in the conventional art.
Generally, a customer premise network requires a broadband network terminal equipment for terminating a network protocol in order to provide a customer premise and a small size office with a broadband service for thereby providing the service to the customer and supporting an internal communication between the customers.
As shown in
FIG. 1
, the conventional customer premise network configured based on a one-to-one connection includes a plurality of customer terminals
10
supplying a broadband service, and a customer premise network terminal equipment
20
terminating a network protocol from a terminal switch
30
of the network or other network equipments, instructing each of the customer terminals
10
to receive or transmit data from the network and supporting a communication with each of the customer terminals
10
. At this time, the customer terminal
10
and the customer premise terminal equipment
20
are connected with a double shielding line supporting a STM-
1
line or an ATM-
25
, and each line is configured to be connected with the customer premise network equipment
20
one-to-one. Therefore, the above-described ring configuration has a problem in that a lengthy line is needed compared to the ring type connection.
As shown in
FIG. 2
, the customer premise network terminal equipment
20
includes a network side line card
23
terminating a protocol from the network and supporting a physical hierarchial access, a customer side line card
21
supporting a physical medium access of each customer terminal and an ATM hierarchial protocol, a switch
22
supporting a communication between the customers and transferring a data between the customer and the network, and a control board
24
controlling the function boards
21
,
22
and
23
and maintaining a control board
24
. With the thusly constituted structure, when each customer requests a data transfer, the data is header-converted by the customer side line card
21
and then is transferred to the switch
22
. The switch
22
uses a routing fielder or a header and determines the routing direction of each cell. The data which is requested a transfer by the routing of the switch
22
is transferred to another customer side line card
21
or the network side line card
23
connected with the network. At this time, since the customer premise network terminal equipment
20
can provide each customer with a maximum transmission speed service which is available on the line, the terminal connected with the customer premise network terminal equipment
20
does not affect another terminal when the terminal is not properly operated during the operation of the system. However, the ports are purchased by the unit of the customer premise network terminal equipment
20
irrespective of the number of the terminals needed in the customer premise, a fabrication cost is increased. In addition, when connecting the terminal more than the number of the support ports of the switch, the identical broadband customer premise network terminal apparatus
20
is needed for thereby increasing a fabrication cost of the system.
SUMMARY OF THE INVENTION
Accordingly, it is an object of the present invention to provide a customer premise network equipment and a data communication method based on a single ring configuration which overcome the aforementioned problems encountered in the conventional art.
It is another object of the present invention to provide a customer premise network equipment and a data communication method based on a single ring configuration which are capable of providing a B-ISDN (Broadband Integrated Service Digital Network) at a low cost, so that the B-ISDN is available for a customer premise and a small size business office.
In order to achieve the above objects, there is provided a customer premise network equipment based on a single ring configuration which includes a plurality of subscriber terminals connected one-to-one or one-to-multiple or a broadcasting type between a network and a subscriber by a single ring, each of the subscriber terminals including a terminal controller controlling a protocol and an access of a signal transmitted through the subscriber terminals, a service access unit interfacing with a direct service in accordance with a control of the terminal controller, a subscriber data controller processing a data from the ring and performing a relay/drop/copy function, and an AAL processing unit matching the cell dropped by the subscriber data processing unit with a proper type of a service type, transferring the thusly matched cell to the service access unit and disassembling a service data requested by the service access unit into an ATM cell type, and each of the subscriber terminal including a drop function for transferring a data from an ATM hierarchy to an upper hierarchy, an add function for transferring the data from the upper hierarchy to the ATM hierarchy, a relay function for feeding-back the data from the ATM hierarchy to a physical hierarchy, and a copy function for concurrently performing the drop and relay functions; and a customer premise network terminal equipment connected by a single ring for receiving an one-to-one protocol and implementing a communication be

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