KR20030056126A - Transporting Method of Uplink Data in Media Access Control Layer of Asynchronous Wireless Terminal - Google Patents

Abstract

PURPOSE: A method for transmitting upward data at a media access control layer of an asynchronous mobile communication terminal is provided to simplify a data transmission process among a PHY layer, an MAC layer, and an RLC layer. CONSTITUTION: An MAC(Media Access Channel) layer receives a MAC setup request primitive(CMAC-CONFIG-REQ) from an RRC(Radio Resource Control) layer(500). The size of data transmittable to a radio bearer corresponding to a set DCH(Data Channel) parameter is initialized as the maximum TF(Transport Format)(501). If the MAC layer receives a transmission synchronization command primitive(TRC-SYNC-CMD) from a PHY(Physical) layer, the size of data transmittable to all radio bearers corresponding to the corresponding transmission channel is set up to transmit data to an RLC(Radio Link Control) layer through an MAC status indicator(MAC-STATUS-IND)(502-504). The MAC layer sets up the size of the TF not exceeding RLC data length as the size of data transmittable to the next TTI(Transmission Time Interval) to the radio bearer received an MAC status response primitive(MAC-STATUS-RES) from the RLC layer(506). The MAC layer returns to wait TRC-SYNC-CMD(507). To the radio bearer received MAC data request primitive(MAC-DATA-REQ) from the RLC layer, an MAC header is added to configure protocol data units and selects a TFI(Transport Format Indicator) fitting to the RLC data length to send physical data request primitive(PHY-DATA-REQ) to the PHY layer(508-510). A TF not exceeding RLC buffer size is sets as the size of the data transmittable to the next TTI(511).

Description

Transporting Method of Uplink Data in Media Access Control Layer of Asynchronous Wireless Terminal

The present invention relates to a method of transmitting uplink data in a media access control layer of an asynchronous mobile communication terminal and a computer-readable recording medium having recorded thereon a program for realizing the method.

In recent years, standardization of third generation mobile communication systems has been actively conducted worldwide. In particular, UMTS (Universal Mobile Terrestrial) applies Wideband Code Division Multiple Access (WCDMA) to provide high-speed packet data services as well as voice services. It is intended to be.

In addition, the WCDMA scheme significantly reduces the signal attenuation in a multipath environment, compared to the conventional narrowband scheme, thereby improving performance and enabling high-speed data transmission while sufficiently accommodating a user.

Meanwhile, in order to prevent waste of radio resources when transmitting user data of a corresponding terminal using a control channel allocated to a terminal by a base station, the related art related to a method of transmitting and receiving user information using both a call channel and a control channel is provided. However, a method for effectively transmitting data between protocol layers of a mobile communication terminal without loss has not been proposed. Therefore, by applying the UTMS WCDMA (3GPP standard) method in the protocol layer of an asynchronous mobile communication terminal, the unnecessary traffic load is reduced. There is a demand for a method of transmitting data between protocol layers that can transmit a large amount of data without using the same.

The present invention has been proposed in order to meet the above-described demands. When the uplink data is transmitted in the media access control layer of the asynchronous mobile communication terminal, the RACH data is generated without exchanging primitives generated at every transmission time interval. The purpose of the present invention is to provide a computer-readable recording medium recording a program for realizing a transmission method and a method for simplifying a data transfer procedure between protocol layers by transmitting.

In addition, the present invention, when transmitting the uplink data in the media access control layer of the asynchronous mobile communication terminal, when the DCH data generation exchanges the transmission time interval information and the transmission channel information between the physical layer and the media access control layer, By adjusting the data transmission amount variably according to the length, the method of uplink data transmission in the medium access control layer for efficient use of radio resources and the transmission of large amounts of data without loss and the program for realizing the method are read by a computer. Another purpose is to provide a record medium that can be used.

1 is a partial configuration diagram of an embodiment of an asynchronous mobile communication terminal to which the present invention is applied.

FIG. 2 is a diagram illustrating an embodiment of a propagation path of primitives when RACH (Random Access Channel) data transmission in a media access control layer of an asynchronous mobile communication terminal according to the present invention; FIG.

3 is a detailed flowchart illustrating a method of transmitting RACH data in a media access control layer of an asynchronous mobile communication terminal according to the present invention;

4 is a diagram illustrating an embodiment of a propagation path of primitives when DCH (Data Channel) data is transmitted in a media access control layer of an asynchronous mobile communication terminal according to the present invention.

5 is a detailed flowchart illustrating a method of transmitting DCH data in a media access control layer of an asynchronous mobile communication terminal according to the present invention.

* Explanation of symbols for the main parts of the drawings

11: control board 12: channel board

13: modem board 14: video / audio board

15: system bus 17: channel board controller

In order to achieve the above object, the present invention provides a method for transmitting uplink data in a media access control layer of an asynchronous mobile communication terminal, and transmits a random access channel (RACH) to a physical layer for data coming from an upper layer. In order to do this, the first step of setting the RACH-related parameters; Receiving random access channel (RACH) data from the upper layer, configuring the data in protocol data units, determining a transmission format factor value suitable for the data size, and then requesting data transmission to the physical layer; And a third step of receiving whether to approve a data access request from the physical layer and notifying a transmission status to the upper layer.

The present invention also provides an asynchronous mobile communication terminal having a processor, comprising: a first function of setting RACH related parameters; A second function of requesting data transmission to a physical layer after receiving random access channel (RACH) data from the upper layer, determining the transmission format factor value suitable for the data size by configuring the data in protocol data units; And a computer-readable recording medium having recorded thereon a program for realizing a third function of receiving a permission for data access from the physical layer and notifying a transmission status to the upper protocol layer.

On the other hand, the present invention for achieving the above object, in the uplink data transmission method in the media access control layer of the asynchronous mobile communication terminal, the data coming from the upper layer through the physical channel through the data channel (DCH: Data Channel) A first to set a transmission synchronization command primitive (TRC-SYNC-CMD) for exchanging transmission time interval (TTI) information and transmission channel information between a physical (PHY) layer and a medium access control layer (MAC) step; Setting a DCH-related parameter and initializing a data size that can be transmitted for a radio bearer corresponding to the set DCH parameter to a transport format (TF); A third step of receiving the TRC-SYNC-CMD, setting information of radio bearers corresponding to a transport channel, and notifying the set information to the RLC layer; A fourth step of setting a size of a data that can be transmitted at a next transmission time interval to a transmission format that does not exceed an RLC data length for a radio bearer receiving MAC layer state information from the RLC layer; And configuring a MAC layer protocol data unit (PDU) for the radio bearer receiving the data transmission request from the RLC layer, selecting a transport format indicator (TFI) suitable for the RLC data length, And a fifth step of requesting data transmission to the PHY layer.

In addition, the present invention provides a transmission synchronization command primitive for exchanging transmission time interval (TTI) information and transmission channel information between a physical (PHY) layer and a medium access control layer (MAC) to an asynchronous mobile communication terminal having a large capacity processor. A first function of setting (TRC-SYNC-CMD); A second function of setting a DCH-related parameter and initializing a data size that can be transmitted for a radio bearer corresponding to the set DCH parameter in a transport format (TF); A third function of receiving the TRC-SYNC-CMD, setting information of radio bearers corresponding to a transport channel, and notifying the set information to the RLC layer; A fourth function of setting a size of a data that can be transmitted at a next transmission time interval to a transmission format that does not exceed an RLC data length, for a radio bearer receiving MAC layer status information from the RLC layer; And configuring a MAC layer protocol data unit (PDU) for the radio bearer receiving the data transmission request from the RLC layer, selecting a transport format indicator (TFI) suitable for the RLC data length, A computer readable recording medium having recorded thereon a program for realizing a fifth function requiring data transfer to the PHY layer is provided.

In general, a media access control (MAC) layer of an asynchronous mobile communication terminal transmits data through a logical channel. The logical channel is defined differently according to what kind of information is transmitted between the MAC layer and the Radio Link Control (RLC) layer. The logical channel is largely divided into a control channel and a traffic channel. The control channel signals signaling information such as access related messages, handover measurements, and power control information, and the traffic channel transmits various data desired by the user.

On the other hand, the physical layer (L1: Layer 1) transmits information to the MAC layer and the upper layer through the transport channel (TrCH), the transport channel is largely divided into a common transport channel and a dedicated transport channel. Here, the transport channel is mapped to a physical channel, and the physical channel is divided into an uplink physical channel and a downlink physical channel.

The uplink common physical channel includes a PRACH (Physical Random Access Channel), and the uplink dedicated physical channel includes a dedicated physical data channel (DPDCH) and a dedicated physical control channel (DPCCH). The PRACH transmits messages on a random access channel (RACH), and the RACH transmits relatively short data such as initial access, non-real-time control and traffic data on the uplink.

The uplink DPDCH transmits a dedicated traffic channel (DTCH) message (user data), and the uplink DPCCH transmits a dedicated control channel (DCCH) message (control information).

The downlink common physical channel (transport channel) includes a Primary / Secondary (P / C) Common Control Physical Channel (CCPCH), and the downlink dedicated physical channel (transport channel) has DPDCH and DPCCH multiplexed in time. Since PCCPCH transmits a Broadcast Control Channel (BCCH) message at a fixed bit rate and uses the same channel code in all cells, when the scramble code of the base station is detected during the initial cell search of the mobile communication terminal, the BCH (Broadcst Channel) can be found. do. SCCPCH transmits paging channel (PCH) and forward access channel (FAC) messages. The data rate varies depending on the situation, and the channel code is transmitted to the P-CCPCH. The downlink DPDCH also transmits user data, that is, a DTCH message, and the downlink DPCCH also transmits control information, that is, a DCCH message.

The present invention relates to a method of transmitting data to a base station through a random access channel (RACH) and a data channel (DCH) of the above-listed channels. Here, the primitive is a command that is in charge of control and data transfer between protocol layers.

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 a block diagram of an embodiment of an asynchronous mobile communication terminal to which the present invention is applied and shows a transmission path of a transport channel synchronization command primitive (hereinafter referred to as TRC-SYNC-CMD) proposed in the present invention.

Here, TRC-SYNC-CMD is a primitive proposed and defined in the present invention and is a synchronization command primitive defined between the PHY layer and the MAC layer in order for the MAC layer to transmit data.

As shown in FIG. 1, the mobile communication terminal includes a control board 11, a channel board 12, a modem board 13, a video / audio board 14, a handset device, and the like. It is connected via the system bus (15).

The control board 11 generates a timing signal 16 (eg, 10 ms, 20 ms, 40 ms, 80 ms), and the control board 11 is equipped with software of the mobile communication terminal to control and manage the mobile communication terminal. It plays a role.

The timing signals generated from the control board 11 are used as a reference clock of a transmission time interval (TTI), which is a transmission period in which data is transmitted between the PHY layer and the MAC layer 18.

The channel board 12 serves as a physical transmission channel and is controlled by the channel board controller 17. According to the timing signal output from the control board 11, the TRC-SYNC-CMD 19, which is a transmission synchronization command primitive, is output through the channel board controller 17 and transmitted to the MAC 18 layer. The TRC-SYNC-CMD 19 includes transport channel information and is a primitive generated for every TTI, and transmits the transport channel information to the MAC layer 18. Here, the transport channel information includes the number of transport channels corresponding to the TTI and a transport channel ID.

FIG. 2 is a diagram illustrating an embodiment of a propagation path of primitives when random access channel (RACH) data is transmitted in a media access control layer of an asynchronous mobile communication terminal according to the present invention.

As shown in FIG. 2, the asynchronous mobile communication terminal to which the present invention is applied includes a radio link control (RLC) layer 200 which is a radio link control layer, a MAC layer 210 which is a medium access control layer, and a PHY (physical layer). Physical) layer 220 and the like.

The RLC layer 200 transmits a 'MAC data request primitive' (hereinafter referred to as MAC-DATA-REQ) to the MAC layer 210 when data is generated in a higher layer. The MAC layer 210 transmits a 'PHY data request primitive' (hereinafter PHY-DATA-REQ) and a 'PHY access request primitive' (hereinafter PHY-ACCESS-REQ) to the PHY layer 220, and then In response, the PHY layer 220 receives a 'PHY access acknowledgment primitive' (hereinafter referred to as PHY-ACCESS-CNF). If the received access information is acknowledged (ACK: Acknowledgment), it notifies the upper layer of transmission success and terminates. . However, if the received information is NON (Nonacknowledgement) or there is no response, the PHY-ACCESS-REQ is transmitted back to the PHY layer 220 and the PHY-ACCESS-CNF is received in response. do.

3 is a detailed flowchart illustrating a method of transmitting RACH data in a media access control layer of an asynchronous mobile communication terminal according to the present invention.

As shown in FIG. 3, after the MAC layer 210 receives a 'MAC setup request primitive' (hereinafter referred to as CMAC-CONFIG-REQ) from the RRC layer 230 and sets RACH related parameters (300), When receiving the 'MAC data request primitive' (hereinafter referred to as MAC-DATA-REQ) from the RLC layer 200 (301), a MAC header is added to configure and receive a MAC-Protocol Data Unit (PDU). After determining the Transmission Format Indicator (TFI) value suitable for the data size (302), the PHY layer 220 transmits a 'PHY data request primitive' (hereinafter referred to as PHY-DATA-REQ) to the PHY layer 220 (303). .

Next, an access service class (ASC) is selected (i.e., the initial value of the number of access attempts (count) is set to 0 and the maximum number of access attempts is selected) 304, and a random access procedure is started. Thereafter, after increasing the number of access attempts (305), it is determined whether the number of access attempts exceeds the maximum value (306). As a result of determination, if the number of access attempts does not exceed the maximum value, the PHY layer transmits the PHY-ACCESS-REQ to the PHY layer 220 (307). If the maximum value is reached, the transmission failed. The random access procedure ends (308).

In this case, in the transmission mode (hereinafter referred to as TM: transparent mode), the transmission status (transmission success or transmission) through the MAC status indication primitive (MAC-STATUS-IND or MAC-STATUS-IND) to the RRC layer 230 Report failure, and in the case of the grant mode (hereinafter referred to as AM: Acknowledged Mode) or the disabled mode (hereinafter referred to as UM: Unacknowledged Mode) through the CMAC-STATUS-IND to the RLC layer 200 (successful transmission) Or transfer failed).

After transmitting the PHY-ACCESS-REQ to the PHY layer 220 because the maximum value is not reached in step 307, the PHY access authorization primitive from the PHY layer 220 (hereinafter referred to as PHY-ACCESS-CNF). When receiving (309), it is determined whether the access information of the received signal is ACK (310). As a result of the determination, if the access information is ACK, the upper layer is notified to the higher layer through the MAC status indication primitive (CMAC-STATUS-IND or MAC-STATUS-IND) (311). As a result of the determination, when the access information is NACK or when the timer expires (times out) 312, the process returns to step 305 to start the random access procedure again from the beginning.

4 is a diagram illustrating an embodiment of a transmission path of primitives in DCH (Data Channel) data transmission in a media access control layer of an asynchronous mobile communication terminal according to the present invention.

As shown in FIG. 4, after setting up the DCH data, when the MAC layer 210 receives the TRC-SYNC-CMD from the PHY layer 220, the TRC-SYNC-CMD includes a corresponding transport channel for each bearer in the TRC-SYNC-CMD. Since the information is defined, MAC-STATUS-IND is transmitted to the RLC layer 200 by setting the transmittable data size of a radio bearer corresponding to each transport channel.

The MAC layer 210 transmits the PHY-DATA-REQ to the PHY layer 200 by selecting a TFI corresponding to the RLC data size for the radio bearer having received the MAC-DATA-REQ from the RLC layer 200. Wait for the next TRC-SYNC-CMD.

Meanwhile, the MAC layer 210 selects a TF that does not exceed the maximum TF or the size of the RLC data for the radio bearer that receives the MAC status response primitive (MAC-STATUS-RES) from the RLC layer 400 to the next TTI. Set the data size to send to, and wait for the next TRC-SYNC-CMD.

5 is a detailed flowchart illustrating a method of transmitting DCH data in a media access control layer of an asynchronous mobile communication terminal according to the present invention.

As shown in FIG. 5, when the DCH data transmission procedure starts, the MAC layer 210 receives a MAC setup request primitive (CMAC-CONFIG-REQ) from the RRC layer 230 and sets DCH-related parameters (500). In step 501, the transmittable data size for the radio bearer corresponding to the configured DCH parameter is initialized to the maximum TF. Then, when receiving the TRC-SYNC-CMD from the PHY layer 220 (502) by setting the transmittable data size for all radio bearers corresponding to the corresponding transport channel (503) by the RLC layer via MAC-STATUS-IND In step 504, the transmission is made to (200).

Subsequently, for the radio bearer receiving the MAC-STATUS-RES from the RLC layer 200 (505), a TF that does not exceed the RLC data length (RLC buffer) is set to a data size that can be transmitted to the next TTI (506). Returning to the process waiting for the TRC-SYNC-CMD (502) (507).

On the other hand, by adding a MAC header to the radio bearer receiving the MAC-DATA-REQ from the RLC layer 200 to configure the MAC-protocol data unit, and selecting the TFI according to the RLC data length (509) PHY layer 220 Transmit PHY-DATA-REQ (510), select a TF that does not exceed the RLC buffer size as the data size that can be transmitted to the next TTI (511), and returns to the process waiting for TRC-SYNC-CMD (502). .

Therefore, according to the data transmission method proposed by the present invention, it is possible to simplify the inter-layer data transmission procedure by reducing unnecessary traffic load during RACH data transmission, and newly defined transmission synchronization command primitive (TRC-) during DCH data transmission. SYNC-CMD) can exchange a large amount of data without loss by exchanging transmission time interval information and data length information between protocol layers.

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

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.

As described above, the present invention provides a MAC state indication primitive (MAC-STATUS-IND) and a MAC state response primitive (MAC) generated at every transmission time interval (TTI) when uplink data is randomly generated (RACH data). By transmitting data without exchanging -STATUS-RESs, it is possible to simplify the data transmission procedure between the PHY layer, the MAC layer and the RLC layer.

In the present invention, when uplink data occurs at a transmission time interval (TTI) period (DCH data), a new primitive called TRC-SYNC-CMD is newly defined to exchange TTI timing information and transport channel information between the PHY layer and the MAC layer. And using the existing MAC status indication primitive (MAC-STATUS-IND) as it is, the radio bearer ID and RLC for each radio bearer in the MAC status response primitive (MAC-STATUS-RES), which is a response primitive to the status indication primitive. By adding the data length, it is possible to improve the data transmission scheme between the MAC layer and the RLC layer. In particular, in transmitting packet data, the actual RLC data length is received for each transmission time interval (TTI) and accordingly, the transmission format factor By variably selecting (TFI), the amount of transmission can be adjusted according to the data size, thereby effectively using radio resources.

Claims (10)

In the uplink data transmission method in the media access control layer of the asynchronous mobile communication terminal, Setting a RACH related parameter to transmit a random access channel (RACH) to the physical layer with data coming from an upper layer; Receiving random access channel (RACH) data from the upper layer, configuring the data in protocol data units, determining a transmission format factor value suitable for the data size, and then requesting data transmission to the physical layer; And A third step of receiving whether to approve a data access request from the physical layer and notifying a transmission status to the upper layer; Uplink data transmission method in a media access control layer of an asynchronous mobile communication terminal comprising a. The method of claim 1, The data transfer request process of the second step, A method of uplink data transmission in a media access control layer of an asynchronous mobile communication terminal, comprising requesting data to the physical layer through a physical layer data request primitive (PHY-DATA-REQ). The method according to claim 1 or 2, The access request process of the third step, After transmitting a physical (PHY) layer access request primitive (PHY-ACCESS-REQ) to the PHY layer, and in response to the physical access acknowledgment (PHY-ACCESS-CNF) is received in response to receiving the access authorization An uplink data transmission method in a media access control layer of an asynchronous mobile communication terminal. In the uplink data transmission method in the media access control layer of the asynchronous mobile communication terminal, In order to transmit data from an upper layer to a physical layer through a dedicated channel (DCH), transmission time interval (TTI) information and transport channel information between a physical (PHY) layer and a media access control layer (MAC) are transmitted. A first step of establishing a transmit synchronization command primitive (TRC-SYNC-CMD) to exchange; Setting a DCH-related parameter and initializing a data size that can be transmitted for the radio bearer corresponding to the set DCH parameter to a transport format (TF); A third step of receiving the TRC-SYNC-CMD, setting information of radio bearers corresponding to a transport channel, and notifying the set information to the RLC layer; A fourth step of setting a size of a data that can be transmitted at a next transmission time interval to a transmission format that does not exceed an RLC data length for a radio bearer receiving MAC layer state information from the RLC layer; And For a radio bearer that has received a data transmission request from the RLC layer, a MAC layer protocol data unit (PDU) is configured, and a transport format indicator (TFI) suitable for an RLC data length is selected to select the PHY. 5th step requiring data transfer to the layer Uplink data transmission method in a media access control layer of an asynchronous mobile communication terminal comprising a. The method of claim 4, wherein The radio bearer information, Uplink data in a media access control layer of an asynchronous mobile communication terminal, which is ID information for each radio bearer, PDU number information for each radio bearer, and RLC data length information, and is transmitted to the RLC layer through a MAC-STATUS-IND primitive. Transmission method. The method of claim 4, wherein The process of receiving the data transfer request of the fifth step, And a MAC layer is requested to transmit data through the MAC-DATA-REQ primitive from the RLC layer. The method of claim 4, wherein The data transfer request process of the fifth step, And the MAC layer requests data transmission to the PHY layer through a PHY-DATA-REQ primitive. The method according to any one of claims 4 to 7, The TRC-SYNC-CMD is, The uplink data transmission method in a media access control layer of an asynchronous mobile communication terminal, comprising: transmission time interval (TTI) information, the number of transmission channels and the number of transmission channel identifiers. In an asynchronous mobile communication terminal having a large capacity processor, A first function of setting RACH related parameters; Upon receiving the random access channel (RACH) data from the upper layer, the data is configured in a protocol data unit (PDU) to determine a transmission format factor value suitable for the data size, and then data transmission to the physical layer. Second function required; And A third function of receiving whether to approve data access from the physical layer and notifying a transmission status to the upper protocol layer; A computer-readable recording medium having recorded thereon a program for realizing this. In an asynchronous mobile communication terminal having a processor, A first function of setting a transmission synchronization command primitive (TRC-SYNC-CMD) for exchanging transmission time interval (TTI) information and transmission channel information between a physical (PHY) layer and a medium access control layer (MAC); A second function of setting a DCH-related parameter and initializing a data size that can be transmitted for a radio bearer corresponding to the set DCH parameter in a transport format (TF); A third function of receiving the TRC-SYNC-CMD, setting information of radio bearers corresponding to a transport channel, and notifying the set information to the RLC layer; A fourth function of setting a size of a data that can be transmitted at a next transmission time interval to a transmission format that does not exceed an RLC data length, for a radio bearer receiving MAC layer status information from the RLC layer; And For a radio bearer receiving a data transmission request from the RLC layer, a MAC layer protocol data unit (PDU) is configured, and a transport format indicator (TFI) suitable for an RLC data length is selected to select the PHY. Fifth function requiring data transfer to layer A computer-readable recording medium having recorded thereon a program for realizing this.