KR19990084631A - Subscriber terminal device in broadband wireless subscriber network and method for adjusting uplink channel timeslot information using same - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

The present invention relates to a subscriber station device and a method for adjusting uplink channel timeslot information.

2. The technical problem to be solved by the invention

The present invention provides a subscriber for transmitting accurate data according to the allocated time slot information by separating a resource manager managing a time slot from a subscriber network matching device (NIU) in a broadband wireless subscriber network (B-WLL) of a digital subscriber network. A terminal device and a method of adjusting time slot information of an uplink channel using the same are provided.

3. Summary of Solution to Invention

The present invention provides a subscriber station apparatus for providing various services, comprising: a protocol processor configured to receive an available channel by driving a protocol; A resource management unit for receiving and maintaining information change information of an uplink timeslot from a protocol processing unit during protocol execution, generating time slot allocation information for the changed timeslot information, and transmitting a cell to an external subscriber network matching device; And a service manager for receiving a report on the use status of the channel and managing a service of a subscriber.

4. Important uses of the invention

The present invention is used in digital subscriber networks and the like.

Description

Subscriber terminal device in broadband wireless subscriber network and method for adjusting uplink channel timeslot information using same

The present invention provides a subscriber network matching device (NIU) for transmitting an uplink channel using a time division multiple access (TDMA) communication system in a broadband wireless local loop (B-WLL) of a digital subscriber network. A subscriber station device having a resource manager that manages a time slot separately from the network interface unit, and transmits accurate data corresponding to the time slot information allocated to the subscriber network matching unit (NIU) by using the same. The present invention relates to a method of adjusting time slot information of an uplink channel so as to prevent it.

1 is an exemplary configuration diagram of a general digital subscriber network.

In general digital subscriber network, a subscriber's request is a service client 61 of a subscriber station device 60 and a media access control (MAC) protocol client of a network interface unit (NIU) 50. 51), the service server by the Asynchronous Transfer Mode (ATM) switch 30 through the Radio Frequency (RF) region and the Air Interface Unit (AIU) 40 10 or the media access control protocol server 20 is connected to establish a service session and provide a service according to a predetermined procedure.

The subscriber station 60 is composed of a personal computer (PC) or a set top box (STB), and the radio frequency (RF) area may be configured as a cable area depending on whether a wired or wireless system is used.

A broadband wireless subscriber network (B-WLL) is composed of a radio frequency (RF) region, a subscriber network matching device 50, and a subscriber station device 60.

The service server 10 and the medium access control (MAC) protocol server 20 always monitor whether there is an event of a subscriber from the service client 61 and the medium access control protocol client 51 in the operating state. When a request from a subscriber occurs, a service session is established according to a predetermined protocol, and the service requested by the subscriber is provided to the subscriber.

The protocol used in the digital subscriber network uses the medium access control (MAC) protocol, which allocates timeslots of the uplink channel that uploads data from the clients 51 and 61 to the servers 10 and 20 using the MAC protocol. Manage. Here, MAC protocols are classified into three types according to the purpose of timeslots: poll, contention, and reservation.

In addition, downlink data descending from the servers 10 and 20 to the clients 51 and 61 may be received by all clients. In this case, the clients 51 and 61 may selectively receive only desired data.

2A and 2B are state flowcharts for transmission of timeslot information of an uplink channel used in the present invention.

The uplink timeslot is a poll timeslot message (Poll_Time_Slot) that indicates the transmission of untimed timeslots when the base stations are using the circuit, and the contention time when two or more devices simultaneously transmit the timeslot on the same line. A slot message (Contention_Time_Slot) and a reservation time slot message (Reservation_Time_Slot) in which each base station reserves a time slot for data packet transmission in advance in order to avoid collision of data packets are classified.

Referring to FIG. 2A, when the media access control protocol server 20 periodically transmits a poll timeslot allocation message (Poll_Slot_Allocation) for a poll timeslot message (Poll_Time_Slot) to the media access control protocol client 51 (201). The media access control protocol client 51 transmits a status response message (Status_Response) indicating the status of the client to the media access control protocol server 20 in the poll timeslot message Poll_Time_Slot (202). At this time, the status response message (Status_Response) used for monitoring purposes of the client must be transmitted to the media access control protocol server 20 in a poll time slot message (Poll_Time_Slot).

The media access control protocol server 20 recognizes the client 51 of the media access control protocol so that the media access control protocol server 20 includes a contention time slot message (Contention_Time_Slot) in which the media access control (MAC) protocol message is carried. When the contention time slot assignment message (Contention_Slot_Allocation) is transmitted (203), the media access control protocol client 51 can use the network.

Therefore, as shown in FIG. 2B, when the medium access control protocol client 51 transmits the reservation request message (Reservation_Request) to the contention time slot message (Contention_Time_Slot) to the medium access control protocol server 20 (204), The media access control protocol server 20 transmits a reservation timeslot allocation message (Reservation_Slot_Allocation) for the contention time slot feedback message (Contention_Slot_Feedback) and the reservation time slot message (Reservation_Time_Slot) to the media access control protocol client 51 (205,206). ).

For example, the timeslot can be allocated to the server side in the required amount if requested by the client side. The use of such timeslot is required when the client side wants to provide a specific service, so the service data is carried on the server. At this time, the service includes all services that require bidirectionality (ie, video on demand (VOD), the Internet, remote security, and remote meter reading).

As described above, time slots should be classified and transmitted according to the purpose of uplink data. In the digital subscriber network, there are time slots according to frequency between the radio network matching device 40 and the subscriber network matching device 50. In the interval, data is divided into ATM cell types.

Accordingly, the subscriber network matching device 50 must transmit data by dividing the time slots. In the related art, the subscriber station terminal can be distinguished from the subscriber station because the media access control protocol client 51 that can distinguish the time slots exists in the subscriber network matching device 50. Since the device 60 does not know such timeslot information, there is a problem in that it is not possible to distinguish and transmit timeslots.

In order to solve the above problems, the present invention provides a time allocated by separating a resource manager managing a time slot in a broadband wireless subscriber network (B-WLL) of a digital subscriber network from a subscriber network matching device (NIU). It is an object of the present invention to provide a subscriber station device for transmitting accurate data suitable for slot information and a method of adjusting time slot information of an uplink channel using the same.

1 is an exemplary configuration diagram of a general digital subscriber network.

2A and 2B are state flow diagrams for transmission of timeslot information of an uplink channel used in the present invention.

3 is a diagram illustrating an embodiment of a subscriber station device according to the present invention;

4 is a diagram of one embodiment of an asynchronous delivery mode (ATM) operation and maintenance (OAM) cell used in the present invention.

5 is a flowchart illustrating a method of adjusting time slot information of an uplink channel according to the present invention;

* Explanation of symbols for the main parts of the drawings

10: service server 20: media access control (MAC) protocol server

30: Asynchronous Transfer Mode (ATM) Switch 40: Wireless Network Matching Unit (AIU)

50: subscriber network matching device (NIU) 60: subscriber terminal device

An apparatus of the present invention for achieving the above object is a subscriber station apparatus for providing various services, comprising: protocol processing means for driving the protocol to receive an available channel; A resource for transmitting and transmitting a cell to an external subscriber network matching device by generating and maintaining time slot assignment information on the changed timeslot information by receiving and maintaining a change of information of an uplink timeslot from the protocol processing means while performing the protocol. Management means; And service management means for reporting the usage status of the channel and managing the subscriber's service.

The method of the present invention includes a method of adjusting uplink channel timeslot information using a subscriber station apparatus applied to a digital subscriber network, comprising: a first step of notifying a resource manager of a change in uplink channel timeslot information during protocol execution by a protocol processor; A second step of generating time slot assignment information on the changed contents of the timeslot by the resource manager, transmitting the cell to an external subscriber network matching device, and maintaining the allocated information; And a third step of retransmitting the cell to the subscriber network matching device by adding contents of the changed timeslot from the protocol processor to the preassigned timeslot allocation information.

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

3 is an exemplary configuration diagram of an embodiment of a subscriber station device according to the present invention, in which "311" represents a media access control protocol processor, "312" represents a resource manager, and "313" represents a service manager, respectively.

The subscriber station apparatus according to the present invention has a structure in which the medium access control protocol client 51 in the subscriber network matching device 50 is separated from the subscriber network matching device 50 in a general digital subscriber network (see FIG. 1). .

The subscriber station 31 according to the present invention operates a medium access control protocol processor 311 for receiving an available channel by driving a medium access control (MAC) protocol and an uplink channel timeslot during execution of a medium access control (MAC) protocol. Information change contents (i.e., new allocation, change, and the like) are reported from the media access control protocol processor 311 and maintained, and time slot assignment information for the changed timeslot information is generated to the subscriber network matching device 50. A resource manager 312 for transmitting an AAM (OTM) operating & maintenance (OAM) cell (see FIG. 4, described later), and a channel management state for managing a subscriber's service. A service manager 313.

If there is a change in the time slot information of the uplink channel while the MAC protocol is performed in the media access control protocol processor 311, the resource manager 312 may operate the Asynchronous Transfer Mode (ATM) operation and maintenance (OAM: Operating & Maintenance). Time slot assignment information is generated in a format such as a cell (see FIG. 4 to be described later) and transmitted to the ATM OAM cell by the subscriber network matching device 50 so that the subscriber network matching device 50 can distinguish the time slots. At this time, the resource manager 312 should maintain the pre-allocated information, and if the change notification occurs in the media access control protocol processor 311, the resource manager 312 immediately retransmits the changed information to reflect the changed information.

The media access control protocol processor 311 modifies and adds this information to the resource manager 312 when a message related to timeslot allocation occurs in the MAC protocol message received from the subscriber network matching device 50. 312 converts the information related to the timeslot into an ATM OAM cell and transmits the information to the subscriber network matching device 50. At this time, the resource manager 312 does not need to delay transmission of actual data (ie, MAC protocol, service message, etc.) until the timeslot information is set in the subscriber network matching device 50.

4 is a structural diagram of an embodiment of an asynchronous delivery mode (ATM) operation and maintenance (OAM) cell used in the present invention.

Referring to FIG. 4, an ATM OAM cell is a payload that is composed of a cell header and timeslot information including information identifying a cell destination and a cell type, and is transmitted to the destination by the cell. It is composed. Here, the payload is divided into 24 regions by 2 bits on the assumption that the frame of the uplink channel is divided into 24 timeslots.

Looking at each region value of the payload composed of timeslot information, region value "0" represents unallocated timeslot, region value "1" represents poll timeslot (Poll_Time_Slot), and region value "2" represents contention Represents a time slot (Contention_Time_Slot). In addition, the area value "3" indicates a reservation time slot (Reservation_Time_Slot).

5 is a flowchart illustrating a method of adjusting timeslot information of an uplink channel according to the present invention.

First, the MAC protocol is driven by the medium access control protocol processor 311 (501).

Then, if there is a change in the information of the uplink timeslot during the execution of the MAC protocol, the media access control protocol processor 311 notifies the resource manager 312 of the changed contents of the timeslot (502) to time the resource manager 312. Time slot allocation information on the changed contents of the slot is generated (503).

Next, the ATM OAM cell (see FIG. 4) generated by the resource manager 312 is transmitted to the subscriber network matching device 50, and the allocated information is maintained (504).

Subsequently, upon receiving notification of the change of the timeslot from the medium access control protocol processor 311 (505), the changed contents are added to the pre-assigned timeslot allocation information and retransmitted to the subscriber network matching device 50 to the ATM OAM cell. (506).

The present invention described above is capable of various substitutions, modifications, and changes without departing from the spirit of the present invention for those skilled in the art to which the present invention pertains, and the above-described embodiments and accompanying It is not limited to the drawing.

As described above, the present invention can control a subscriber network matching device (NIU) using an ATM OAM cell, so that many functions of the MAC protocol processing to be processed in the NIU can be performed in an external subscriber terminal device, such as a CPU or the like. This eliminates the need for components, and enables the simple establishment of a broadband wireless subscriber network (B-WLL) in a short time, and by using the subscriber station to transmit accurate data for the time slot information assigned to the NIU, There is an effect that can be prevented.

Claims (6)

In the subscriber station for providing various services, Protocol processing means for driving a protocol to receive an available channel; A resource for transmitting and transmitting a cell to an external subscriber network matching device by generating and maintaining time slot assignment information on the changed timeslot information by receiving and maintaining a change of information of an uplink timeslot from the protocol processing means while performing the protocol. Management means; And Service management means for managing the subscriber's service by reporting the usage status of the channel Subscriber terminal device comprising a. The method of claim 1, The cell, Cell header including information identifying the cell destination and cell type, and unallocated time slot, poll time slot message (Poll_Time_Slot), and contention time slot message by dividing the data into 24 areas of 2 bits. Subscriber station, characterized in that the asynchronous delivery mode operation and maintenance cell consisting of a payload transmitted to the destination by the cell consisting of (Contention_Time_Slot), and time slot information including a reservation time slot message (Reservation_Time_Slot). Device. The method of claim 1, The protocol is Subscriber terminal device, characterized in that the Media Access Control (MAC) protocol. A method of adjusting uplink channel timeslot information using a subscriber station device applied to a digital subscriber network, A first step of notifying a resource manager of a change in uplink channel timeslot information during protocol execution in a protocol processor; A second step of generating time slot assignment information on the changed contents of the timeslot by the resource manager, transmitting the cell to an external subscriber network matching device, and maintaining the allocated information; And A third step of retransmitting the cell to the subscriber network matching device by adding contents of the changed timeslot from the protocol processor to the pre-assigned timeslot allocation information; Up channel timeslot information adjustment method using a subscriber station device comprising a. The method of claim 4, wherein Each cell, Cell header including information identifying the cell destination and cell type, and unallocated time slot, poll time slot message (Poll_Time_Slot), and contention time slot message by dividing the data into 24 areas of 2 bits. Subscriber station, characterized in that the asynchronous delivery mode operation and maintenance cell consisting of a payload transmitted to the destination by the cell consisting of (Contention_Time_Slot), and time slot information including a reservation time slot message (Reservation_Time_Slot). A method of adjusting uplink channel timeslot information using a device. The method of claim 4, wherein The protocol is A method of adjusting uplink channel timeslot information using a subscriber station device, which is a media access control (MAC) protocol.