KR100466612B1 - Multi-channel Time Schedule System and Method - Google Patents

Abstract

In the present invention, in providing a time alignment service, a multi-channel time schedule for satisfying a quality of service (QoS) for voice and video data to support real-time services for multiple channels. The present invention relates to a system and a method for receiving a buffer delay or advance from a data receiving system and using the information to delay or advance data to be transmitted for a specific time. By providing a timer device for monitoring time information, a device capable of buffering audio and video data, and a method thereof, a time schedule capable of real-time service for multiple channels is realized. In addition, the present invention implements a near-real-time time schedule for a plurality of channels using a Time Memory Pointer (FIFO) First In First Out (FIFO), and actually registers the delay and advance request by deleting and registering as it is. By considering only the channels that are reserved, the time required for the time schedule can be reduced.

Description

Multi-channel time schedule system and method

The present invention relates to a multi-channel time schedule system and method, and particularly, in providing a time alignment service, a quality of service (QoS) for voice and video data to support real-time services for multiple channels. The present invention relates to a multi-channel time schedule system and method for satisfying the above requirements.

In general, an interface to a support mode of a user plane (IU UP) protocol of a 3rd generation partnership project (3GPP) technical specification (TS) between a CN and an RNC of an asynchronous International Mobile Telecommunications (IMT) -2000 system (Interface) is required, which is a protocol for satisfying QoS for voice or video data requiring real-time service.

The 3GPP TS defines a Radio Network Layer (RNL) UP protocol used on the Iu interface. The purpose of the Iu UP protocol is to maintain the independence of the CN domain of circuit switching or packet switching and not to be restricted or dependent on the Transport Network Layer (TLN). Another object is to provide the flexibility to perform services independent of CN domains and to transfer services across CN domains.

Therefore, the Iu UP protocol defines that it has modes of operation performed based on RAB (Radio Access Bearer) rather than viewed as being performed based on CN domain or telephone service. The Iu UP protocol is located in the UP of the RNL on the Iu interface (ie the Iu UP protocol layer) and is used to carry user data associated with the RABs. One Iu UP protocol instance ID is associated with one RAB. If a plurality of RABs are established as one UE (User Equipment) arbitrarily given, the RABs use a plurality of IU UP protocol instances. The Iu UP protocol instances are present at an Iu Access Point defined in the 3GPP TS.

Operation modes of the corresponding IU UP protocol are defined as a transparent mode and a support mode for a predetermined service data unit (SDU) size.

The transparent mode is for RABs that do not require any special from their Iu UP protocol rather than the transmission of user data. Within this transparent mode, the Iu UP protocol instance does not exchange any Iu UP protocol information with other instances on the Iu interface, i.e., it does not have an Iu frame transmitted. The Iu UP protocol layer is crossed by PDUs (Protocol Data Units) switching between upper layers and the transport network layer.

This support mode is for RABs that require some special thing from the Iu UP protocol as well as the transfer of user data. Although the Iu UP frames are not generated in the transparent mode, when the support mode is operated, the same Iu UP protocol instances exchange Iu UP frames.

On the other hand, the conventional method for transmitting the voice was used to transmit at a speed of 64 (Kbps), but in recent years due to the development of the technology to compress the voice, depending on the compression method, 32 (Kbps), 16 ( Kbps) and 12 (Kbps) or less. In addition, processing for jammed or unmute can be performed, further increasing the efficiency of compression, and reducing the bandwidth in the transmission line, thereby allowing more subscribers to the same band that can be processed by one system. It has an advantage that it can accommodate.

However, the packet data method is used as a form of delivering such compressed voice, which is a variable bit rate (VBR) rather than a constant bit rate (CBR), which causes the effect of the real-time service to be deteriorated.

Accordingly, in order to satisfy the QoS, rate control, data buffer, and error processing for real-time data transmission belong to the contents of the Iu UP protocol. Among them, the request for reducing and increasing the rate of data for voice or video is performed by the environment, silence and noise between the subscriber and the radio station of the RNC. In this case, the time alignment function, that is, the instantaneous rate There is a need for a buffer delay or advance of the data due to the change, and it is also necessary to be able to process the service by the corresponding time alignment function in real time to thousands of tens of thousands or more of subscribers.

In other words, in providing the real time service by the time alignment function in the support mode, it is necessary to delay or advance the audio and video data to be supported by the real time service for a predetermined time by a limited environment. In the technology of, buffering audio and video data and timer device that receives information about buffer delay or advance and monitors the information about time so that the data to be transmitted can be locked or pre-transmitted for a specific time. There was no device for buffering.

The present invention is to solve the necessity or disadvantages as described above, the purpose of which is to provide a time alignment service, to satisfy the QoS for voice and video data to support real-time services for multiple channels The present invention provides a multi-channel time schedule system and method for implementing a time schedule capable of real-time service for multiple channels.

In addition, another object of the present invention is to provide a time alignment service, by implementing a time schedule capable of real-time service for the multi-channel by allowing the audio and video data to support the real-time service to be confined or transmitted in advance for a specific time have.

In addition, another object of the present invention is to provide a time alignment service, in order to receive the information about the buffer delay or advance, and to delay or advance the data to be actually transmitted by a specific time using the information in time The present invention provides a timer device for monitoring information and a device capable of buffering audio and video data.

In addition, another object of the present invention is to provide a time alignment service, using a time memory pointer (FIFO) FIFO to implement a near-real-time time schedule for a plurality of channels, delay and advance request deletion and registration This is to reduce the time required for the time schedule by applying only as it is to consider only channels that are actually registered.

1 is a block diagram illustrating a multi-channel time schedule system according to an embodiment of the present invention.

FIG. 2 is a block diagram showing the configuration of a time alignment scheduler in FIG. 1; FIG.

3 and 4 are flowcharts illustrating a multi-channel time schedule method according to an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

100: CN (Core Network) 200: RNC (Radio Network Controller)

110, 210: data buffer unit 120, 220: data transmission and reception unit

130, 230: frame control unit 140: time alignment response frame generation unit

150: time alignment scheduler

240: time alignment control frame generation unit

10: Time Memory 20: FIFO (First In First Out)

30: FIFO monitoring unit 40: Timer

The multi-channel time schedule system according to an embodiment of the present invention for achieving the above object, the data received from the data transmission side system stores in the data buffer provided therein, the data buffer is already set data A data buffer unit of a data receiving side system which checks whether the data is full or empty and applies state information of the data buffer; A frame control and generation unit of a data receiving side system for generating and transmitting a time alignment control frame regarding delay or advance information according to data buffer state information applied from the data buffer unit of the data receiving side system; A frame control unit of a data transmission side system for analyzing and time-recognizing time alignment control frames received from the data receiving side system; Check the time schedule information from the frame control unit of the data transmitting side system, compare and store the delay time and the advance time required from the data receiving side system, monitor the information on the corresponding time, and set the required time value and time set. And a time alignment scheduler of the data transmission system for controlling the transmission of data stored in the data buffer unit of the data transmission system according to the comparison result after comparing the values.

Preferably, the time schedule information is a time as much as a delay or advance requested from the data receiving side system, a current time indicating a storage time from a timer, a flag of Valid or Invalid and a channel ID. It includes a (Identifier).

Also preferably, the time alignment scheduler may include a time memory configured to receive and store time schedule information from a frame controller of the data transmitting side system; A FIFO for storing a pointer indicating a corresponding channel position of the time memory when the time schedule information is newly registered in the time memory; A timer that counts the current time in real time and displays the current time in the data sending side system; And a FIFO monitoring unit configured to compare time values by accessing an area of a time memory indicated by the pointer when there is a stored pointer while monitoring the FIFO.

On the other hand, the multi-channel time schedule system according to this embodiment of the present invention for achieving the other object as described above, the data receiving time schedule information for delaying or advancing the data that should support the real-time service by any time A time memory for receiving input from a side system; A FIFO for storing a pointer indicating a corresponding channel position of the time memory when the time schedule information is newly registered in the time memory; A timer that counts the current time in real time and displays the current time in the data sending side system; A FIFO monitoring unit that monitors the FIFO and controls the transfer of data stored in a data buffer of the data transmission system by accessing an area of a time memory indicated by the pointer and comparing a time value when a pointer stored in the FIFO exists. Characterized in that the made up.

Preferably, the time memory is a delay time or advance time required from the data receiving side system when receiving information on advance from the data receiving side system, a difference value between the corresponding delay time and the advance time, a channel ID, And storing the current time of the time requested from the data receiving side system.

Also, preferably, the FIFO monitoring unit monitors a connection ID storage FIFO relating to data transmission processing to determine whether there is a connection ID stored in the FIFO, and compares a time value of the time memory with a current time value. And a time comparison unit for determining whether to transmit the data stored in the data buffer of the data transmission side system.

Further, preferably, the time comparator may determine that the value of comparing the present time stored in the time memory with the present time counted by the timer is greater than or equal to the delay time required from the data receiving side system. Characterized in that the data stored in the data buffer to be transmitted to the data receiving side system.

Alternatively, the time comparator is stored in the data buffer of the data sending side system when the value comparing the current time stored in the time memory with the current time counted by the timer is less than the delay time required from the data receiving side system. It locks in without transmitting data and reads out the next connection ID.

On the other hand, in the multi-channel time schedule method according to an embodiment of the present invention for achieving the above object, in transmitting data to support the real-time service, the data receiving side system checks the status of the data buffer Generating and transmitting time schedule information corresponding to the identified state; Checking the time schedule information input from the data receiving side system in the data transmitting side system, and comparing and storing the delay time and the advance time requested by the data receiving side system; And monitoring the information on the time in the data transmitting side system, comparing the requested time value with a time set value, and transmitting the data when the requested time elapses. It features.

Preferably, the time schedule information includes a time as much as a delay or advance requested from the data receiving side system, a current time, a valid or invalid flag, and a channel ID of the time requested from the data receiving side system. It is done.

Also preferably, the comparing and storing may include receiving time schedule information from the data receiving side system and determining whether the corresponding time schedule information is information about a delay; If the time schedule information is information about a delay, storing the information about the delay in a time memory and setting a flag; When the information on the delay is stored in the time memory, checking whether a previous registration is made through a flag; And storing the pointer indicating the channel position of the time memory in the FIFO in the case of the first registration.

Alternatively, the comparing and storing process may further include deleting the time schedule information and clearing a flag when the time schedule information is information about advance.

Preferably, the clearing step may include: checking whether a valid flag is set in the time memory by using the information on the advance as an advance value of a timer device in a system; Obtaining a difference between a delay time stored in the time memory and an advance time when the valid flag is set; And if the delay time is smaller than the advance time, disabling the valid flag value and initializing the time value to '0'.

Further, the data transfer process monitors a FIFO storing a pointer indicating a corresponding channel position of the corresponding time memory when the time schedule information is newly registered in the time memory, and reads the corresponding pointer to correspond to the corresponding channel. Checking whether a flag of the time memory is set; Accessing a specific area of the time memory indicated by the pointer when the flag of the time memory is set; Comparing a difference value between a current time stored in the time memory and a current time counted by a timer with a delay time value requested from the data receiving side system; If the difference value is greater than or equal to the delay time value, transmitting the data and setting a current time in the time memory.

Alternatively, if the difference value is less than the delay time value, the data transmission process further includes storing the data as it is and reading a next pointer to check whether a flag of a time memory corresponding to the channel is set. Characterized in that the made up.

Alternatively, the data transfer process may further include deleting the pointer when the flag of the time memory is cleared.

Alternatively, the data transmission process may include: obtaining a second difference value between the stored delay time and the advance time when the information on the advance is received while the delay time is already stored in the time memory; Comparing a first difference value between a current time at the time when advance is requested from the data receiving side system and a current time counted by a timer with the second difference value; And if the first difference value is greater than or equal to the second difference value, transmitting the data and setting a current time in the time memory.

On the other hand, the multi-channel time schedule method according to an embodiment of the present invention for achieving the other object as described above, in transmitting the data that should support the real-time service, the time schedule information from the data receiving side system Updating the received information by comparing the information registered in the time memory; Checking whether or not the time schedule information is registered through a flag and storing a pointer indicating a corresponding channel position of the time memory in a FIFO in the case of initial registration; The FIFO is monitored and the pointer is read to determine whether a flag of a time memory corresponding to the corresponding channel is set, and stored in the time memory at a delay time value requested by the data receiving side system and a current time counted by a timer. Comparing the difference value with the current time at the time; And if the difference value is greater than or equal to the delay time value, transmitting the data and setting a current time in the time memory.

Alternatively, the multi-channel time scheduling method according to this embodiment of the present invention includes the steps of deleting the flag of the time memory when the delay of the data to support the real-time service is no longer needed; And deleting the pointer when the flag of the time memory is cleared.

Alternatively, in the multi-channel time scheduling method according to this embodiment of the present invention, if the difference value is smaller than the delay time value, the data is stored as it is and the next pointer is read to determine the time memory corresponding to the corresponding channel. The method may further include checking whether a flag is set. Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In the multi-channel time schedule system according to an exemplary embodiment of the present invention, when transmitting arbitrary data (for example, voice, video, etc.), a system for transmitting a rate control frame in a receiving side system of the corresponding data is transmitted. To process the transmission rate change caused by the environment or silence and noise between stations, while continuing to process the current high rate data due to momentary rate changes (e.g., rate reduction). In processing, it is difficult to cover the band currently processing low-rate data, so a time alignment control frame is generated and transmitted to the corresponding data transmitting system to request a data buffer (i.e., data delay). For requests at rate, requests to retract previous buffer requests (i.e. And a time alignment service for transmitting an advanced request) to the data transmission side system.

In addition, the multi-channel time schedule system according to an embodiment of the present invention, when performing the time alignment service, time analysis for the corresponding channel, that is, compare the buffer delay time value or the advance time value required from the data receiving side system. And store it, monitor it, compare the required time with the time set time, and send the traffic when the required time elapses. In other words, when the delayed time value is larger than the required delay time value or the advance time value, the data of the channel is transmitted to the data receiving side system.

Here, the present invention provides a time schedule to process the time alignment service in real time to multi-subscribers (about thousands to tens of thousands of subscribers), and 500 (500) to 40 (㎳) in 500 (㎲) units. Try to perform delay or advance. In addition, it can be seen that after the advance request is delayed, there is a relative advance to it.

The configuration thereof is as shown in FIG. 1, in the CN 100 that is the data transmission side, the data buffer unit 110, the data transmission / reception unit 120, the frame control unit 130, and the time alignment response frame. The generation unit 140 and the time alignment scheduler 150 are included. In the RNC 200, which is the data receiving side, the data buffer unit 210, the data transmission / reception unit 220, and the frame control unit 230 are included. And a time alignment control frame generator 240. Here, the configuration is an example of transmitting any data from the CN 100 to the RNC 200, it should be understood that the present invention is not limited to this, any data transmission and reception system is applicable.

The data buffer unit 110 of the CN 100 transmits data stored in the data buffer according to the transmission control of the time alignment scheduler 150 of the CN 100. It transmits to the RNC 200 through.

The data transmitting / receiving unit 120 of the CN 100 receives a time alignment control frame from the RNC 200 and applies the time alignment control frame to the frame control unit 130 of the CN 100, and responds to the time alignment of the CN 100. The time alignment response frame applied from the frame generator 140 is transmitted to the RNC 200, and the data applied from the data buffer unit 110 of the CN 100 is transmitted to the RNC 200.

The frame controller 130 of the CN 100 analyzes a time alignment control frame received from the RNC 200 through the data transceiver 120 of the CN 100 to check time schedule information, and analyzes the corresponding time. According to the result, a command to generate a time alignment response frame for a data delay or advance request (that is, a response frame generation command) is generated and applied to the time alignment response frame generation unit 140 of the CN 100. The time alignment information is then informed to the time alignment scheduler 150 of the CN 100. Here, the time schedule information is information for requesting a buffer delay or advance for a predetermined time for data (for example, voice, video, etc.) that should support real-time services for a specific channel, and the RNC 200 (that is, Time as much as the delay or advance requested from the data receiving side system), a current time indicating the storage time from the timer, a valid or invalid flag, and the like.

The time alignment response frame generation unit 140 of the CN 100 generates a time alignment response frame according to a response frame generation command applied from the frame control unit 130 of the CN 100 to generate data of the CN 100. It is applied to the transceiver 120.

The time alignment scheduler 150 of the CN 100 receives time schedule information from the frame controller 130 of the CN 100 and confirms receipt of a time delay or advance request for a specific channel from the RNC 200. Storing a pointer indicating a channel for which the delay or advance is required, and storing the time schedule information at the position of the pointer corresponding to the channel for which the delay or advance is required, and then continuously whether the pointer is stored. Read the stored pointer, read and analyze the time schedule information stored in the memory area corresponding to the read pointer, and store the data in the data buffer unit 110 of the CN 100 when the required time elapses. It is controlled to transmit the data to the RNC (200).

The data buffer unit 210 of the RNC 200 stores data received from the CN 100 through the data transceiver 220 of the RNC 200 in a data buffer, in which a corresponding data buffer is already set. It checks whether the data amount is full or empty, and applies information about the checked data buffer state to the frame control unit 230 of the RNC 200.

The data transmission / reception unit 220 of the RNC 200 receives the data and time alignment response frame from the CN 100 and applies the received data to the data buffer unit 210 of the RNC 200. The received time alignment response frame is applied to the frame controller 230 of the RNC 200, and the time alignment control frame applied from the time alignment control frame generator 240 of the RNC 200 to the CN 100. Send it.

The frame controller 230 of the RNC 200 receives the information on the data buffer state from the data buffer unit 210 of the RNC 200 to generate a time alignment control frame regarding data delay or data advance information. (I.e., generate a control frame generation command) and apply it to the time alignment control frame generation unit 240 of the RNC 200, and from the CN 100 through the data transmission / reception unit 220 of the RNC 200. If there is no time alignment response frame received, it recognizes that an error has occurred, and generates a control frame command again and applies it to the time alignment control frame generator 240 of the RNC 200.

The time alignment control frame generation unit 240 of the RNC 200 generates a time alignment control frame according to a control frame generation command applied from the frame control unit 230 of the RNC 200 to generate data of the RNC 200. It is applied to the transceiver 220.

As shown in FIG. 2, the time alignment scheduler 150 includes a time memory 10, a FIFO 20, a FIFO monitoring unit 30, and a timer 40.

The time memory 10 is responsible for receiving and storing time schedule information from the frame control unit 130 of the CN 100.

When the FIFO 20 newly registers the time schedule information in the time memory 10, a pointer indicating a corresponding channel position of the time memory 10 (that is, a connection ID value of the corresponding channel). It saves and prints the pointer that was input first.

The FIFO monitor 30 reads the stored pointer information while monitoring the FIFO 20 and accesses an area of the time memory 10 indicated by the pointer to compare time values. It includes a time comparison unit for comparing the time value of the time memory 10 with the current time value, and a portion for monitoring the connection ID storage FIFO (that is, the FIFO 20) related to data transmission processing.

Here, the reason for comparing the time value is that a value obtained by comparing the current time stored in the time memory 10 with the current time counted by the timer 40 is requested from the RNC 200 (ie, the data receiving side system). In the case of greater than or equal to the delay time, the data stored in the data buffer unit 110 of the CN 100 is transmitted to the RNC 200 (that is, the data receiving side system).

The timer 40 counts the current time in real time and displays the current time in the CN 100 (ie, the data transmission side system).

Looking at the multi-channel time schedule method according to an embodiment of the present invention as follows.

First, the data transmission / reception unit 220 of the data receiving side system (eg, the RNC 200) receives data from the data transmitting side system (eg, the CN 100) and receives the data buffer unit 210 of the corresponding RNC 200. ), The data buffer unit 210 stores the data received from the CN 100 in the data buffer. At this time, the data buffer unit checks whether the data buffer is full or empty up to the already set data amount. Information about the confirmed data buffer state is applied to the frame control unit 230 of the corresponding RNC (200).

Accordingly, the frame controller 230 receives the information on the data buffer state from the data buffer unit 210 to generate a time alignment control frame regarding data delay or data advance information (ie, a control frame generation command). Is generated and applied to the time alignment control frame generator 240 of the RNC 200.

Accordingly, the time alignment control frame generation unit 240 generates a time alignment control frame according to a control frame generation command applied from the frame control unit 230 and the CN 100 through the data transmission / reception unit 220. Will be sent to.

Then, the data transmission / reception unit 120 of the CN 100 receives the time alignment control frame from the RNC 200 and applies it to the frame control unit 130 of the CN 100. The frame control unit 130 analyzes the time alignment control frame received from the RNC 200 through the data transmission / reception unit 120 to confirm time schedule information, and according to the analysis result, the data delay or advance request is determined. Generates a command to generate a time alignment response frame (ie, a response frame generation command) to the time alignment response frame generation unit 140 of the CN 100, and applies the checked time schedule information to the CN ( The time alignment scheduler 150 of 100) is informed.

Accordingly, the time alignment response frame generation unit 140 generates a time alignment response frame according to a response frame generation command applied from the frame control unit 130 to the RNC 200 through the data transmission / reception unit 120. Send it.

At the same time, the time alignment scheduler 150 receives time schedule information from the frame controller 130 and stores a pointer indicating a channel for which a corresponding delay or advance is required, and at the same time corresponds to a channel for which a corresponding delay or advance is required. The time schedule information is stored at the position of the pointer. Then, the time schedule information is continuously checked to determine whether the pointer is stored, the stored pointer is read, and the time schedule information stored in the memory area corresponding to the read pointer is read and analyzed. When the required time elapses, it controls to transmit the data stored in the data buffer unit 110 of the CN 100 to the RNC 200.

In other words, in the multi-channel time scheduling method according to an embodiment of the present invention, in transmitting arbitrary data, that is, data that needs to support a real-time service, the data receiving side checks the time schedule information input from the data receiving side system. A first operation procedure of comparing and storing the delay time and the advance time required from the system; The second operation process is performed by monitoring information on the corresponding time, comparing the required time value with the time set value, and transmitting the corresponding data when the required time elapses.

The first operation process is when the data receiving side system (eg, the RNC 200) requests the data transmitting side system (eg, the CN 100) for a data delay or advance for an arbitrary time. Accepts this and reads the content currently registered in the channel's time memory 10 (i.e. flag and delay request time) and updates it by comparing the new content (i.e. delay and advance) with the previous content. Do it.

Then, in the data transmission side system, after confirming whether or not the previous registration is made through the flag, in the case of the first registration, a pointer indicating the corresponding channel position of the time memory 10 is assigned to the time memory pointer FIFO (that is, the FIFO 20). On the contrary, if the delay is no longer needed, the flag value of the time memory 10 is deleted.

In the second operation process, when information about a delay is stored in the time memory 10, the FIFO monitor 30 infinitely monitors the FIFO 20, and reads a pointer value of the FIFO 20. After checking the flag value of the time memory 10 of the corresponding channel, if the flag value is cleared, the pointer value is deleted. If the flag value is set, the delay time value and the time from the current time are deleted. The difference between the current time and the time stored in the memory 10 is compared.

At this time, if the difference value is greater than or equal to the delay time value, the data stored in the data buffer unit 110 is transmitted and the current time is set in the time memory 10, and the difference value is greater than the delay time value. If it is small, the data is stored as it is and the next pointer is read to repeat the operation. Here, the FIFO 20 was used as a time memory pointer FIFO to implement a time schedule close to real time for N channels, and in order to reduce the time required for time schedule, delay and advance request deletion and registration were applied as it is. Only channels that are registered are considered.

The first operation process will be described in more detail with reference to the flowchart of FIG. 2.

Information for requesting a buffer delay or advance of data (for example, voice, video, etc.) that needs to support real-time service in the RNC 200 (that is, the data receiving side system) for an arbitrary time, that is, the RNC 200 Time schedule information including time as much as a delay or advance requested from the terminal, a current time indicating a storage time from the timer 40, a valid or invalid flag, a channel ID, and the like. If inputted as, the CN 100 receives the corresponding time schedule information (S21).

At this time, the CN 100 determines whether the time schedule information received from the RNC 200 is information about a delay (S22). Here, the information about the delay is defined as '500 ms × N (1 to 80: delay)' in units of 500 ms.

If the time schedule information received from the RNC 200 in step 22 is information about a delay, the information on the delay (that is, the current time of the time requested from the RNC 200, Channel ID, delay time required from the RNC 200, etc.) are stored in the time memory 10 and a flag is set (S23). At this time, the current time value and delay time value are set in the corresponding connection address and a valid flag is declared.

When the information about the delay is stored in the time memory 10, when a new registration is performed after checking whether a previous registration has been made through a flag, a pointer indicating a corresponding channel position of the time memory 10 is indicated by the FIFO 20. ) And (S24).

On the other hand, if the time schedule information input from the RNC 200 in the 22nd step (S22) is information about the advance, not the information on the delay, since the advance is meaningful only after receiving the information on the delay, The time schedule information input from the time memory 10 is deleted, and the flag is cleared (cleared) and then terminated (S25).

In other words, when the advance information is received from the RNC 200, the CN 100 sets the valid flag in the time memory 10 using the advanced information as the advance value of the internal timer device. Check if it is

In this case, the information on the advance is defined as '500 ms × N (129 to 208: advance)' in 500 units.

When the valid flag is set, the advanced time is subtracted from the currently stored delay time. If the delay time is smaller than the advanced time, the valid flag value is disabled and the time value is initialized to '0'.

In addition, when the information on the advance is received while the delay time is already stored in the time memory 10, the difference between the currently stored delay time and the advance time is stored in the time memory 10. The first difference value between the current time at the time when the advance is requested from the RNC 200 and the current time counted by the timer 40 is compared with the second difference value between the corresponding currently stored delay time and the advance time. When the first difference value is greater than or equal to the corresponding second difference value, control is performed to transmit data stored in the data buffer unit 110 of the CN 100 to the RNC 200.

The second operation process will be described in more detail with reference to the flowchart of FIG. 3.

The FIFO monitoring unit 30 monitors the FIFO 20 and checks whether there is data, that is, when the pointer information is recognized (S31).

The FIFO monitoring unit 30 accesses a specific area of the time memory 10 indicated by the currently read pointer (S32).

Accordingly, the FIFO monitoring unit 30 calculates a difference value between the current time of the time requested from the RNC 200 and the current time counted by the timer 40 stored in the time memory 10. Compared with the delay time required from (S33).

If, in step 33 (S33), the difference between the current time of the time requested from the RNC 200 and the current time counted by the timer 40 stored in the time memory 10 is determined from the RNC 200. If greater than or equal to the required delay time, it is controlled to transmit the data stored in the data buffer unit 110 of the CN (100) to the RNC (200) (S34).

Accordingly, the data buffer unit 110 transmits the data stored in the data buffer through the data transceiver 120 of the CN 100 according to the transmission control of the time alignment scheduler 150. Send to.

However, in the 33rd step S33, the difference between the current time of the time point requested from the RNC 200 and the current time counted by the timer 40 is stored in the time memory 10. If the delay time is smaller than the required delay time, the data stored in the data buffer unit 110 is locked without being transmitted, and the control unit returns to step 31 (S31) and returns from the RNC 200 stored in the time memory 10. The above operation is repeated until the difference between the requested current time and the current time counted by the timer 40 is greater than or equal to the delay time requested from the RNC 200.

In other words, by reading the data from the FIFO 20 and using the data as a pointer value, the area of the time memory 10 corresponding thereto is read, and the read value is compared with the time value currently turning internally. When a time out occurs, the Done valid flag of the time memory 10 is set and the current time value is set again.

At this time, if the audio and video data to support the real-time service is introduced, first check whether the valid flag of the time memory 10 is disabled, and if it is disabled, the data is transmitted immediately, If it is enabled, check the completion valid flag. If the complete valid flag is set, the corresponding data is transmitted immediately, and if not set, the data is continuously stored in the data buffer unit 110.

In this case, the FIFO monitoring unit 30 reads the enable signal of the FIFO 20 to detect whether there is data. If it detects that data exists, the time memory uses the corresponding address as a pointer. Check the completion valid flag of (10). If the complete valid flag is set, the data of the data buffer unit 110 is immediately transmitted. If not, the enable signal of the FIFO 20 corresponding to the next connection ID is monitored.

As described above, in the present invention, in providing a time alignment service, voice compressed data can be provided in real time and time can be scheduled in real time.

Although the preferred embodiments of the present invention have been described in detail above, it will be understood by those skilled in the art that the present invention may be modified or modified in various ways. Therefore, changes of the embodiments of the present invention will not be able to escape the technical scope of the present invention.

Claims (9)

The data receiving side system stores data received from the data transmitting side system in the data buffer provided therein, and checks whether the data buffer is full or empty up to the already set data amount and applies the status information of the corresponding data buffer. A data buffer section; A frame control and generation unit of a data receiving side system for generating and transmitting a time alignment control frame regarding delay or advance information according to data buffer state information applied from the data buffer unit of the data receiving side system; A frame control unit of a data transmission side system for analyzing and time-recognizing time alignment control frames received from the data receiving side system; Check the time schedule information from the frame control unit of the data transmitting side system, compare and store the delay time and the advance time required from the data receiving side system, monitor the information on the corresponding time, and set the required time value and time set. And a time alignment scheduler of the data transmission side system for controlling the transmission of data stored in the data buffer unit of the data transmission side system according to the comparison result after comparing the values. The method of claim 1, The time schedule information includes a time as much as a delay or advance requested from the data receiving side system, a current time indicating a storage time from a timer, a valid or invalid flag, and a channel identifier (Identifier). Schedule system. The method of claim 1, The time alignment scheduler includes: a time memory configured to receive and store time schedule information from a frame controller of the data transmitting side system; A first in first out (FIFO) for storing a pointer indicating a corresponding channel position of the time memory when the time schedule information is newly registered in the time memory; A timer that counts the current time in real time and displays the current time in the data sending side system; And a FIFO monitor configured to compare time values by accessing an area of a time memory indicated by the pointer when there is a stored pointer while monitoring the FIFO. The method of claim 3, The time memory, when receiving information about advance from the data receiving side system, the delay time or advance time required from the data receiving side system, the difference value between the delay time and the advance time, the channel ID, and A multi-channel time schedule system, characterized in that for storing the current time of the time requested from the data receiving side system. In transmitting the data to support the real-time service, the step of checking the state of the data buffer in the data receiving side system to generate and transmit time schedule information corresponding to the identified state; Checking the time schedule information input from the data receiving side system in the data transmitting side system, and comparing and storing the delay time and the advance time requested by the data receiving side system; And monitoring the information on the time in the data transmitting side system, comparing the requested time value with the time set value, and transmitting the data when the requested time elapses. How to schedule channel time. The method of claim 5, The comparing and storing may include receiving time schedule information from the data receiving side system and determining whether the corresponding time schedule information is information about a delay; If the time schedule information is information about a delay, storing the information about the delay in a time memory and setting a flag; When the information on the delay is stored in the time memory, checking whether a previous registration is made through a flag; And storing a pointer indicating a corresponding channel position of the time memory in a first in first out (FIFO) in the case of a first registration. The method of claim 6, In the comparing and storing process, when the time schedule information is information about an advance, a valid flag is set in the time memory by deleting the time schedule information and setting the information about the advance as an advance value of a timer device inside a system. Confirming that the operation is completed; Obtaining a difference between a delay time stored in the time memory and an advance time when the valid flag is set; Disabling the valid flag value and initializing the time value to '0' if the delay time is less than the advance time. The method of claim 5, In the data transmission process, when the time schedule information is newly registered in the time memory, a FIFO storing a pointer indicating a location of a corresponding channel of the corresponding time memory is monitored, the corresponding pointer is read, and a flag of the time memory corresponding to the corresponding channel. Checking whether is set; Accessing a specific area of the time memory indicated by the pointer when the flag of the time memory is set; Comparing a difference value between a current time stored in the time memory and a current time counted by a timer with a delay time value requested from the data receiving side system; And transmitting the data and setting a current time in the time memory if the difference value is greater than or equal to the delay time value. The method of claim 8, The data transmission process may include obtaining a second difference value between the stored delay time and the advance time when the information on the advance is received while the delay time is already stored in the time memory; Comparing a first difference value between a current time at the time when advance is requested from the data receiving side system and a current time counted by a timer with the second difference value; And transmitting the data and setting a current time in the time memory when the first difference value is greater than or equal to the second difference value.