KR20030055628A - Flag processing method for timing control message in wireless communication RNC - Google Patents

Abstract

PURPOSE: A method of processing a flag for a timing adjustment message in a wireless communication RNC(Radio Network Controller) is provided to consecutively transmit the timing adjustment message by a CEP(Channel Element Processor) before a THP(Traffic Handling Processor) sends adjusted data, and to re-adjust an adjusted CFN(Connection Frame Number), thereby preventing surge phenomenon of the frame CFN. CONSTITUTION: A system confirms whether received control data is TOA(Time Of Arrival) control data(301), and checks whether an adjustWait flag of TOA control data call information is '0'(302). If not, the system calculates a 'diffToa' value subtracting a 'ZERO_TOA_VALUE' value from a received value(303) without performing timing adjustment, and performs a 'fnAdjust(diffToa)' process(304). The system decides whether the received value is a DCCH(Dedicated Control Channel)(305). If so, the system sets a flag to '4'(306), and if the value is a DTCH(Dedicated Traffic Channel), the system sets the flag to '2'(307).

Description

Flag processing method for timing control message in wireless communication RNC}

The present invention relates to a flag processing method for a timing adjustment message at a wireless communication control station (ie, a radio network controller (RNC)) and a computer-readable recording medium having recorded thereon a program for realizing the method. In particular, a channel element control processor in a radio network controller (RNC) of a next generation mobile communication network-based asynchronous mobile communication system (WCMS: Wideband CDMA Mobile System) such as International Mobile Telecommunication (IMT-2000) and Universal Mobile Telecommunications System (UMTS) In order to process a timing adjustment message transmitted from a channel element processor (CEP), the traffic control processor (THP) and the CEP use flags.

Since the conventional mobile communication synchronization system uses a global positioning system (GPS) as a basic clock, the terminal may receive a message transmitted from the base station at the same time.

However, since the current asynchronous mobile communication system (WCMS) does not use GPS, the time information of data transmitted and received by the system load may change, and in order to solve this problem, a base station modem (that is, a wireless transmit / receive subsystem (RTS) Radio Transciver Subsystem) must transmit the timing information to the traffic control processor (THM) and send it (CFN) .The base station modem must transmit at this time so that the UE (User Equipment) arrives at the same time during handover. Larger signals can be used in the data. If the synchronization received by the Node-B synchronization and the transport channel synchronization at the start of the call is out of the window when the data received by the CEP is out of the window by the system load, the channel element control processor (CEP) is the traffic control processor (THP). A time adjustment control message to the user.

Conventionally, when the channel element control processor (CEP) sends a time adjustment message to the traffic control processor (THP), the traffic control processor (THP) receives a connection frame number (CFN) by the received time of argument (TOA). By adjusting, transport channel synchronization is actively controlled. In this case, however, the channel element control processor CEP may continuously send the timing adjustment message before the traffic control processor THP receiving the timing adjustment message sends the adjusted data, thereby again adjusting the adjusted CFN. You can get out of the window again. In this case, we need an algorithm to control the adjustment of the adjusted CFN again.

In summary, the downlink transport synchronization sends a message for the Node-B synchronization from the traffic control processor (THP) at the start of the call, and in response to this message, the traffic control processor (THP) and the channel element control processor ( The time difference between CEP) can be known, and with this time difference, the CFN of the frame to be transmitted is determined, and the transport synchronization test is performed with this determined CFN. The CFN determined by the secondary synchronization is changed at every transmission timing interval (TTI) to transmit a data frame from the traffic control processor (THP) to the channel element control processor (CEP). However, as the load on the system increases, the transmitted traffic frame arrives late, and the channel element control processor (CEP) transfers the timing adjustment request control frame defined on the Iub interface, which is an interface between the control station and the base station, to the traffic control processor (THP). Send. At this time, the traffic control processor THP processes the control frame transmitted by the difference between the frame processing time and the channel element control processor CEP, and before the data adjusted by the CFN is transmitted, the channel element control processor ( At the CEP), a timing adjustment request message is received, which causes another adjustment of the adjusted CFN.

Therefore, in the present technical field, in order to solve the timing adjustment problem, a method of adjusting with each flag is essential in the traffic control processor (THP) and the channel element control processor (CEP).

SUMMARY OF THE INVENTION The present invention has been proposed to meet the above demands, and is a flag processing in THP and CEP to process timing adjustment messages sent by CEPs in a radio network controller (RNC) of an asynchronous mobile communication system (WCMS). It is an object of the present invention to provide a computer-readable recording medium having recorded thereon a method and a program for realizing the method.

1 is a diagram illustrating a control frame for implementing transmission channel synchronization and timing adjustment functions for downlink to which the present invention is applied;

2 is a data timing diagram transmitted and received on a traffic processing processor (THP) and channel element control processor (CEP) interface used in the present invention.

3 is a flowchart illustrating a flag processing method for a timing adjustment message in a normal case according to the present invention;

FIG. 4 is a flow diagram of an embodiment of a flag processing procedure used until receiving a coordinated connection frame number (CFN) in a channel element control processor (CEP) in accordance with the present invention.

5 is a flowchart illustrating a flag processing method for a timing adjustment message in an abnormal case according to the present invention.

* Explanation of symbols for the main parts of the drawings

10: base station (wireless transmit / receive subsystem (RTS))

20: control station (Serving Radio Network Controller (S-RNC))

In accordance with another aspect of the present invention, there is provided a flag processing method for a timing adjustment message in a radio communication control station (RNC), the connection occurring when processing a timing adjustment message transmitted by a channel element control processor (CEP). In order to prevent the frame number (CFN) wave phenomenon, the first step of setting the timing flag (adjustWait Flag) in units of calls in the RNC frame control unit (RFHB) of the traffic control processor (THP); And a second step of adjusting the timing to wait as long as the time considering the transmission timing interval (TTI) by using the adjustWait Flag.

The present invention also provides a third step of setting a timing flag toaFlag when the channel element control processor (CEP) first transmits a timing adjustment message; And a fourth step of adjusting the timing to wait until the frame data with the modified concatenated frame number CFN arrives by using the timing flag toaFlag.

In addition, the present invention provides a flag processing method for a timing adjustment message in a radio communication control station (RNC), comprising: a connection frame number (CFN) generated when processing a timing adjustment message transmitted from a channel element control processor (CEP). A first step of setting a timing flag (toaFlag) upon first transmission of a timing adjustment message by a channel element control processor (CEP) to prevent a wave phenomenon; And a second step of adjusting the timing by using the timing flag toaFlag to wait until the frame data having the modified concatenated frame number CFN arrives.

On the other hand, in the present invention, a flag unit for a timing adjustment message, to the radio communication control station (RNC) having a processor, the RNC frame control unit (RFHB) to prevent the CFN wave phenomenon in the unit of one call unit A first function of using the adjustWait flag to check whether the received control data is TOA control data, and checking whether the adjustWait flag of the TOA control data call information is 0; A second function of performing a fnAdjust (diffToa) by calculating a diffToa obtained by subtracting ZERO_TOA_VALUE from the received ptCe-> toa if the adjustWait flag is not 0 and does not adjust the timing if it is 0; a third function of determining whether ptCe-> chType is a control channel (DCCH); And a program for realizing the fourth function of adjusting the adjustWait flag to 4 if ptCe-> chType is the control channel (DCCH), and adjustingWait flag to 2 if the traffic channel (DTCH) is determined as the third function. Provide a computer readable recording medium.

In addition, the present invention provides a first method for analyzing whether a data frame received by a channel element control processor (CEP) is received in a window for processing a flag for a timing adjustment message by a radio communication control station (RNC) having a processor. function; A second function of re-checking whether toaFlag is 0 if false, and sending a TOA request message to the received link if true, and setting ToaFlag to 1; And a computer-readable recording medium having recorded thereon a program for realizing a third function of transmitting data to a terminal if toaFlag = 0 if the analysis of the first function is true.

In addition, the present invention further provides a method for processing a flag for a timing adjustment message, comprising: a first step of analyzing, at a radio communication control station (RNC) having a processor, whether a data frame received at a channel element control processor (CEP) is received in a window; function; A second function of re-checking whether toaFlag is 0 if false, and sending a TOA request message to the received link if true, and setting ToaFlag to 1; A third function of transmitting data to the terminal with toaFlag = 0 if the analysis result of the first function is true; A fourth function of checking whether the received control data is TOA control data and checking whether the adjustWait flag of the TOA control data call information is 0; A fifth function of performing a fnAdjust (diffToa) by calculating a diffToa obtained by subtracting ZERO_TOA_VALUE from the received ptCe-> toa if the adjustWait flag is not 0, and if the adjustWait flag is not 0; a sixth function of determining whether ptCe-> chType is a control channel (DCCH); And a program for realizing the seventh function of adjusting the adjustWait flag to 4 if the ptCe-> chType is the control channel (DCCH) and the adjustWait flag to 2 if the traffic channel (DTCH) is determined as the result of the sixth function. Provide a computer readable recording medium.

The present invention relates to timing coordination performed between a THP and a channel card CEP in an asynchronous radio network controller (RNC). In order to solve the timing coordination problem, the present invention relates to a traffic control processor (THP) and a channel element control processor (CEP). Adjust with flags. That is, the present invention uses a flag in the traffic control processor (THP) and the channel element control processor (CEP) to process the timing adjustment message transmitted by the channel element control processor (CEP) in the asynchronous radio network controller (RNC), In particular, in case the transport data due to the system load is out of the window, the timing adjustment by the system load of the traffic control processor (THP) and the channel element control processor (CEP) can be made more secure.

To this end, the present invention requires an algorithm that sets a timing flag in the RNC Frame Handling Block (RFHB) of the traffic control processor (THP) and waits for a time considering the TTI, and the channel element control processor (CEP) first starts. There is a need for an algorithm that sets toaFlag when sending a timing adjustment message and waits for frame data with a modified CFN to arrive. By using this algorithm, the CFN can be prevented from spreading due to a printer or system error caused by the channel element control processor (CEP).

The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is an explanatory diagram showing a control frame for implementing a transmission channel synchronization and timing adjustment function for a downlink to which the present invention is applied, and is a channel element of a wireless transmit / receive subsystem (RTS) 10 for downlink determined in 3GPP. A timing adjustment message structure 1a transmitted to the traffic control processor THP of the radio network controller RNC when the frame data received by the control processor CEP is out of the window.

As shown in the figure, a timing adjustment message 1a is sent by the channel element control processor CEP of the wireless transmit / receive subsystem (RTS) 10, which the traffic control processor THP receives.

That is, the asynchronous mobile communication system (WCMS) is a delay caused by downlink synchronization between the wireless transmit / receive subsystem (RTS) 10 and the radio network controller (RNC) 20 at the beginning of the system and the number of subscribers. If the data received from the radio transceiver subsystem (RTS) 10 does not enter the window, the timing adjustment message 1a is sent to the traffic control processor (THP) of the serving radio network controller (S-RNC) Serving RNC (20). By sending, the downlink can be synchronized.

FIG. 2 is a data timing diagram transmitted and received on a traffic processing processor (THP) and a channel element control processor (CEP) interface used in the present invention. FIG. 2 is a view illustrating a downlink frame generated when an algorithm proposed by the present invention is not used. Indicates timing.

In the traffic control processor (THP), signals and traffic are simultaneously transmitted (1), and the channel element control processor (CEP) receives a frame with 20 CFN (2) and when the received data is received in the window, the received data is received by the terminal. (2) If there is data from the terminal, the data is transmitted to the traffic control processor (THP) (3).

After 20 ms, the traffic control processor (THP) transmits the traffic data to the channel element control processor (CEP) (4), and the channel element control processor (CEP) receives the data transmitted by the traffic control processor (THP) ( 5) The data transmitted from the terminal is transmitted again to the traffic control processor (THP) (6).

Next, after 20 ms, the traffic control processor (THP) transmits both signal and traffic data to the channel element control processor (CEP) at the same time (7), at which time the transmitted data arrives at the channel element control processor (CEP) and the window is closed. 9, the timing adjustment message of the received data and the received data are simultaneously transmitted to the traffic control processor (THP) (10).

On the other hand, the traffic control processor (THP) transmits data to be sent to the channel element control processor (CEP) (11), and processes the data transmitted from the channel element control processor (CEP) (12). The data sent in step 11 is also a frame out of window because the timing has not been adjusted yet, so the channel element control processor CEP again sends a timing adjustment request message (14).

Since the timing adjustment message sent in step "10" arrives too late, the traffic control processor (THP) adjusts (28 → 32) the CFN of the frame to be processed and transmitted (16). However, since the channel element control processor CEP receives the unadjusted " 15 " data, the timing adjustment message of the frame is sent again (17, 18). The traffic control processor (THP) transmits a data frame with the CFN (30 → 32) adjusted by the channel element control processor (CEP) in step "16" (19), and the timing adjustment transmitted in step "14". Receive another message to adjust the CFN (34 → 36) (20). The data frame transmitted in step "19" with the CFN adjusted in step "16" is correctly received (21). However, by adjusting the CFN again in the "20" step (32 → 36) (23) by the timing adjustment message sent in the "14" step (23), a positive TOA that arrives data too soon now occurs and the CFN is changed according to the TOA. Decrease (38-> 36).

As described above, if the traffic control processor (THP) and the channel element control processor (CEP) do not perform any control when transmitting the timing adjustment message, the wave phenomenon of CFN continues as shown in FIG. 2. In order to prevent this phenomenon, the algorithm proposed in FIG. 3 is required.

3 is a flowchart illustrating a method for processing a flag for a timing adjustment message in a normal case according to the present invention, which is shown in FIG. 2 among control frame messages received from the RNC frame control unit RFHB of the traffic control processor THP. In order to prevent the wave phenomenon described, the following example shows the use of the adjustWait flag on an arc basis.

First, it is checked whether the received control data is TOA control data (301), and it is checked whether the adjustWait flag of the TOA control data call information is 0 (302).

As a result of the check, if the adjustWait flag is not 0, the timing is not adjusted, and if it is 0, diffToa is calculated by subtracting ZERO_TOA_VALUE from the received ptCe-> toa (303) and fnAdjust (diffToa) is performed (304).

In operation 305, it is determined whether ptCe-> chType is a dedicated control channel (DCCH).

As a result of the determination, if ptCe-> chType is DCCH, the adjustWait flag is set to 4 (306), and if it is DTCH, the adjustWait flag is set to 2 (307). By doing so, it is possible to appropriately control the TOA received from the traffic control processor (THP) position and to control the controlled CFN again to prevent the CFN wave phenomenon.

FIG. 4 is a flowchart illustrating an example of a flag processing procedure used to receive an adjusted connection frame number (CFN) in a channel element control processor (CEP) according to the present invention, and the adjustWait value set in FIG. 3 is 20ms. An example in which the adjustWait flag is set to 0 after 80 ms set in FIG. 3 by decreasing by 1 for each TTI is shown.

First, adjustWait is set to 0 in the call initialization function (401), and it is checked whether adjustWait is greater than 0 in the function performed every 20ms (402).

As a result of the check, if adjustWait is greater than zero, it decreases adjustWait (403), again every 20ms (404) checks if adjustWait is greater than zero (402) and if adjustWait is greater than zero (403).

5 is a flowchart illustrating a flag processing method for a timing adjustment message in an abnormal case according to the present invention.

The algorithm proposed in FIG. 3 is an algorithm considering only a normal case of the system. However, due to unexpected printer tasks and system loaders in the channel element control processor (CEP), the above algorithm alone cannot solve this abnormal case. Therefore, by inserting a control algorithm in the channel element control processor (CEP) receiving the CFN, it is possible to prevent the CFN wave phenomenon caused by an abnormal cause. The control algorithm is as follows.

First, it is analyzed whether the data frame received by the channel element control processor (CEP) is received in the window (501).

If the result of the analysis is false (i.e., if a data frame received in the CEP is not received in the window), it is again checked if toaFlag is zero (502), if true, a TOA request message is sent to the received link (503), and ToaFlag is returned. It is set to 1 (504).

If the result of the analysis is true (i.e., if a data frame received in the CEP is received in the window), then toaFlag = 0 (505), and transmit data to the terminal (506).

Referring to FIG. 3 again, the subsequent process is checked to see if the control data received synchronization is TOA control data (301), and it is checked whether the adjustWait flag of the TOA control data call information is 0 (302).

As a result of the check, if the adjustWait flag is not 0, the timing is not adjusted, and if it is 0, diffToa is calculated by subtracting ZERO_TOA_VALUE from the received ptCe-> toa (303) and fnAdjust (diffToa) is performed (304).

In operation 305, it is determined whether ptCe-> chType is a dedicated control channel (DCCH).

As a result of the determination, if ptCe-> chType is DCCH, the adjustWait flag is 4 (306), and if it is DTCH, the adjustWait flag is 2 (307). By doing so, it is possible to appropriately control the TOA received from the traffic control processor (THP) position and to control the controlled CFN again to prevent the CFN wave phenomenon.

The method of the present invention as described above may be implemented as a program and stored in a computer-readable recording medium (CD-ROM, RAM, ROM, floppy disk, hard disk, magneto-optical disk, etc.).

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and various substitutions, modifications, and changes are possible in the art without departing from the technical spirit of the present invention. It will be clear to those of ordinary knowledge.

According to the present invention as described above, the CEP may continuously transmit the timing adjustment message before the THP receiving the timing adjustment message sends the adjusted data even in a normal case, thereby again leaving the window by adjusting the adjusted CFN again. Can be prevented with THP's adjustWait flag, and the toaFlag can prevent waves in the frame CFN even under abnormal conditions caused by CEP printing errors, making the system more stable.

Claims (9)

A flag processing method for a timing adjustment message at a radio communication control station (RNC), In order to prevent CFN waves occurring when processing timing adjustment messages transmitted by the channel element control processor (CEP), the RNC frame control unit (RFHB) of the traffic control processor (THP) is performed in units of calls. Setting a timing flag (adjustWait Flag); And A second step of adjusting timing to wait for a time considering the transmission timing interval (TTI) by using the adjustWait Flag; A flag processing method for a timing adjustment message at a radio communication control station (RNC) comprising a. The method of claim 1, The flag processing process in the RNC frame control unit (RFHB), To prevent CFN waves, use the adjustWait flag per arc, A third step of checking whether the received control data is TOA control data and checking whether the adjustWait flag of the TOA control data call information is 0; A fourth step of performing fnAdjust (diffToa) by calculating a diffToa obtained by subtracting ZERO_TOA_VALUE from the received ptCe-> toa if the adjustWait flag is not 0, and if the adjustWait flag is not 0; a fifth step of determining whether ptCe-> chType is a control channel (DCCH); And As a result of the determination of the fifth step, if the ptCe-> chType is the control channel (DCCH), the adjustWait flag is 4, and if the traffic channel (DTCH), the adjustWait flag is 2; A flag processing method for a timing adjustment message at a radio communication control station (RNC) comprising a. The method of claim 1, Setting a timing flag toaFlag when the channel element control processor CEP first transmits a timing adjustment message; And A fourth step of adjusting timing to wait for arrival of frame data having a modified connection frame number (CFN) by using the timing flag (toaFlag) And a flag adjustment method for a timing adjustment message at a radio communication control station (RNC). The method of claim 3, wherein The flag processing process in the channel element control processor (CEP), A fifth step of analyzing whether the data frame received by the channel element control processor (CEP) is received in the window; A sixth step of re-checking whether toaFlag is 0 if false, and sending a TOA request message to the received link if true, and setting ToaFlag to 1; And As a result of the analysis of the fifth step, if true, toaFlag = 0, and the seventh step of transmitting data to the terminal A flag processing method for a timing adjustment message at a radio communication control station (RNC) comprising a. A flag processing method for a timing adjustment message at a radio communication control station (RNC), Timing flags when the timing adjustment message is first transmitted by the channel element control processor (CEP) to prevent the connection frame number (CFN) wave that occurs when processing the timing adjustment message sent by the channel element control processor (CEP). a first step of setting (toaFlag); And A second step of adjusting timing to wait until frame data with a modified connection frame number CFN arrives using the timing flag toaFlag A flag processing method for a timing adjustment message at a radio communication control station (RNC) comprising a. The method of claim 5, The flag processing process in the channel element control processor (CEP), A third step of analyzing whether the data frame received by the channel element control processor (CEP) is received in the window; A fourth step of re-checking whether toaFlag is zero if false, and sending a TOA request message to the received link if true, and setting ToaFlag to 1; And A fifth step of transmitting data to the terminal with toaFlag = 0 if true as a result of the analysis of the third step A flag processing method for a timing adjustment message at a radio communication control station (RNC) comprising a. To a radio communication control station (RNC) having a processor for flag processing for timing adjustment messages, In order to prevent CFN wave phenomenon in RNC Frame Control (RFHB), use adjustWait flag in unit of unit. A first function of checking whether the received control data is TOA control data and checking whether the adjustWait flag of the TOA control data call information is 0; A second function of performing a fnAdjust (diffToa) by calculating a diffToa obtained by subtracting ZERO_TOA_VALUE from the received ptCe-> toa if the adjustWait flag is not 0 and does not adjust the timing if it is 0; a third function of determining whether ptCe-> chType is a control channel (DCCH); And As a result of the determination of the third function, the fourth function of setting the adjustWait flag to 4 if ptCe-> chType is the control channel (DCCH), and setting the adjustWait flag to 2 if the traffic channel (DTCH). A computer-readable recording medium having recorded thereon a program for realizing this. To a radio communication control station (RNC) having a processor for flag processing for timing adjustment messages, A first function of analyzing whether a data frame received by a channel element control processor (CEP) is received in a window; A second function of re-checking whether toaFlag is 0 if false, and sending a TOA request message to the received link if true, and setting ToaFlag to 1; A third function of transmitting data to the terminal with toaFlag = 0 if true as a result of the analysis of the first function A computer-readable recording medium having recorded thereon a program for realizing this. To a radio communication control station (RNC) having a processor for flag processing for timing adjustment messages, A first function of analyzing whether a data frame received by a channel element control processor (CEP) is received in a window; A second function of re-checking whether toaFlag is 0 if false, and sending a TOA request message to the received link if true, and setting ToaFlag to 1; A third function of transmitting data to the terminal with toaFlag = 0 if the analysis result of the first function is true; A fourth function of checking whether the received control data is TOA control data and checking whether the adjustWait flag of the TOA control data call information is 0; A fifth function of performing a fnAdjust (diffToa) by calculating a diffToa obtained by subtracting ZERO_TOA_VALUE from the received ptCe-> toa if the adjustWait flag is not 0, and if the adjustWait flag is not 0; a sixth function of determining whether ptCe-> chType is a control channel (DCCH); And As a result of the determination of the sixth function, if ptCe-> chType is the control channel (DCCH), the adjustWait flag is 4; if the traffic channel (DTCH), the seventh function is the adjustWait flag 2. A computer-readable recording medium having recorded thereon a program for realizing this.