KR100705040B1 - Data transmission method for mobile communication system and controlling method for mobile communication terminal - Google Patents

Abstract

The present invention relates to a data transmission method of a mobile communication system and a control method of a mobile communication terminal. The control method of the mobile communication terminal includes a CB S from a mobile communication system providing a CBS (Cell Broadcast Short Message) service. Receiving a System Information Block (SIB) to which a new message bitmap including SFN (System Frame Number) information to receive a message is attached; Constructing a mapping table of a CTCH block set (BS) and a system frame number (SFN) using an allocation period of a logical channel CTCH included in the SIB and a CBS frame offset; Identifying a CTCH BS in which a CBS message exists through the new message bitmap; Checking a system frame number (SFN) of a CTCH BS in which the CBS message exists in the mapping table; And activating a reception function of the CBS message according to a system frame number (SFN) synchronization in which the CBS message exists. As a result, the mobile communication terminal can immediately calculate the SFN for identifying its own CBS message during the level 1 process of calculating the DRX through the SIB. You can save.

Description

Data transmission method for mobile communication system and control method of mobile communication terminal according to this invention {Data transmission method for mobile communication system and controlling method for mobile communication terminal}

1 is a signal flow diagram of a data transmission method of a mobile communication system according to the present invention;

2 is a flowchart of a control method of a mobile communication terminal according to the present invention.

*** Explanation of symbols for the main parts of the drawing ***

10: UE (User Equipment) 12: Appl (Application)

14: BMC (Broadcast / Multicast Control)

16: RRC (Radio Resource Control)

18: RLC (Radio Link Control)

20: MAC (Medium Access Control)

22: PHY (Physical Layer)

30: RNC (Radio Network Controller)

32: RRC (Radio Resource Control)

34: BMC (Broadcast / Multicast Control)

The present invention relates to a data transmission method of a mobile communication system and a control method of a mobile communication terminal.

The CBS (Cell Broadcast Short Message) service provided by the mobile communication system broadcasts a CBS message to all user terminals belonging to a specific cell in a point-to-multipoint manner. Content such as voice, video, and the like can be provided. Since the CBS message is provided according to a Discontinuous Reception (DRX) cycle, the user terminal may save battery by turning off the receiver power in a cycle in which the CBS message is not received.

Accordingly, a method of calculating a CBS DRcontinuous Cycle (DRX) cycle for receiving a CBS message in a user terminal is divided into two levels.

The first level calculation method is calculated using a system information block (SIB) received when the terminal is powered on. In the SIB channel information (SCCPCH / FACH / CTCH), 'RLC mode (Radio Link Control mode)', data rate (Max data rate, bps), 'TrCH type (Transport Channel)', coding type (Coding Type), It includes a value for a physical channel type (PhCh type), an allocation period of a common traffic channel (CTCH), CBS frame offset information, and the like.

Accordingly, the UE sets the receiver according to the SIB and calculates a system frame number (hereinafter, abbreviated as 'SFN') using the allocation period of the CTCH (Common Traffic Channel) and the CBS frame offset information. Acquire synchronization with the channel CTCH.

On the other hand, the second level calculation method is to calculate a DRX cycle by receiving a BMC Schedule Message from the SFN calculated through the first level method. Here, the BMC schedule message includes the length of the CBS schedule and the start point information of the CBS schedule period, so that it is possible to know when the CBS schedule period starts and ends. Therefore, until the BMC schedule message is received, the DRX cycle should be calculated by the first level method.

However, the first level method needs to check whether the UE wants to receive the CBS message from the SFN of the DRX cycle calculated through the SIB, while the terminal calculates its own CBS message when the DRX cycle is calculated using the second level method. Since the location of the SFN to wake up is calculated, it is possible to receive the CBS message in the corresponding DRX cycle without checking whether the CBS message is sent to the self.

Accordingly, until the DRX cycle proceeds from the first level to the second level, the UE should check the CBS message even if the UE does not have its own CBS message, thereby increasing power consumption.

The present invention has been made to solve the above-mentioned problems, attach a part of the information transmitted through the BMC schedule message in the mobile communication system to the SIB to provide to the mobile communication terminal, through which the CBS message reception in the mobile communication terminal It is an object of the present invention to provide a data transmission method of a mobile communication system and a control method of a mobile communication terminal according to which the DRX cycle can be quickly calculated to save power of a user terminal.

In the data transmission method of the mobile communication system and the control method of the mobile communication terminal according to the present invention for achieving the above object, the control method of the mobile communication terminal, a mobile communication providing a CBS (Cell Broadcast Short Message) service Receiving a system information block (SIB) to which a new message bitmap including SFN (System Frame Number) information to receive a CB S message is attached, from the system; Constructing a mapping table of a CTCH block set (BS) and a system frame number (SFN) using an allocation period of a logical channel CTCH included in the SIB and a CBS frame offset; Identifying a CTCH BS in which a CBS message exists through the new message bitmap; Checking a system frame number (SFN) of a CTCH BS in which the CBS message exists in the mapping table; And activating a reception function of the CBS message in synchronization with a system frame number (SFN) in which the CBS message exists.

Here, channel information (SCCPCH / FACH / CTCH), 'RLC mode (Radio Link Control mode)', data rate (Max data rate, bps), 'TrCH type (Transport Channel)' included in the SIB, coding type The method may further include setting a reception environment according to a coding type and a physical channel type.

In addition, the data transmission method of the mobile communication system according to the present invention, a new BMC scheduling message of the broadcast / multicast control (Broadcast / Multicast Control) in a mobile communication system providing a CBS (Cell Broadcast Short Message) service Extracting a New Message Bitmap parameter; And attaching the new message bitmap to a system information block (SIB) to broadcast it to a mobile communication terminal.

Here, the SIB includes channel information (SCCPCH / FACH / CTCH), 'RLC mode (Radio Link Control mode)', data rate (Max data rate, bps), 'TrCH type (Transport Channel)', coding type (Coding) Type), it is preferable to further include information such as the physical channel type (PhCh type).

Hereinafter, with reference to the accompanying drawings will be described in detail with respect to the data transmission method of the mobile communication system according to a preferred embodiment of the present invention and a control method of the mobile communication terminal accordingly.

1 is a signal flowchart of a data transmission method of a mobile communication system according to the present invention.

Here, each component for providing the CBS service will be described first. The user equipment (hereinafter referred to as 'UE') 10 is provided with a CBS service through a wireless network, where the interface between the UE 10 and the wireless network is denoted as Uu. The wireless network providing the CBS service includes a Radio Network Controller (hereinafter referred to as 'RNC') 30 and one or more Node Bs managed by the RNC 30, where the RNC 30 and the Node Mark the interface between B as Iub.

The UE 10 includes an application (hereinafter, referred to as Appl) 12 for using the CBS service, a physical layer 22 for transmitting and receiving radio signals, and a medium access control ( Medium Access Control (hereinafter referred to as MAC) layer 20, Radio Link Control (hereinafter referred to as RLC) layer 18, Radio Resource Control (hereinafter referred to as RRC) layer 16, Broadcast / Multicast Control 14 is included. The RRC 16 controls the BMC 14, the RLC 18, the MAC 20, and the PHY 22 to control overall functions related to wireless network connection such as call setup, control information transmission, and data transmission and reception. The MAC 20 transmits and receives data through the PHY 22, and the RLC 18 processes the data received through the MAC 20 and delivers the data to the RRC 16 or processes the data provided by the RRC 16. Provided to the MAC (20).

On the other hand, the RNC 30 of the radio network includes a radio resource control (hereinafter referred to as RRC) layer 32 and a broadcast / multicast control (hereinafter referred to as BMC) 34. . By allocating and managing radio resources, it supports the communication function of the UE 10 and provides a CBS service.

The RNC 30 broadcasts transmission and reception configuration information to the UE 10 side of the cell through a System Information Block (SIB) in order to synchronize the transport channel with the UE 10 belonging to the cell. In addition, the RNC 30 controls the BMC 34 to schedule CBS messages and to broadcast CBS messages to specific cells. BMC messages used in the BMC 34 include BMC messages and BMC schedule messages. The BMC Schedule message contains the New Message Bitmap parameter, which is the new message bitmap for each CBS message that is sent between schedules. As a parameter indicating whether the transmission is repetitive transmission, the UE 10 provides an SFN to receive the CBS message. Here, the RNC 30 of the present invention includes the new message bitmap parameter included in the BMC schedule message provided by the BMC 34 in the SIB and transmits the SIB to the UE 10 when the SIB is transmitted. The SIB transmitted to includes the allocation period of the logical channel CTCH, a CBS frame offset, and a new message bitmap parameter.

If the use of the CBS service is selected in the UE 10, the Appl 12 following the use of the CBS service transmits an activation request (BMC-ACTIVATION-REQUEST) message to the BMC 14. Here, the BMC 14 includes the CB message ID in the activation request message (S10).

The BMC 14 transmits a reception index (CBMC-Rx-IND) message to the RRC 16 to request reception of a CBS service message (S12).

Accordingly, the RRC 16 receives SIB, which is system information provided by the RNC 30 of the wireless network (S16).

Here, the RRC 36 of the RNC 30 of the wireless network receives a BMC schedule message (BMC_DRX_INFO) including DRX information from the BMC 34 (S14), and a new message bit included in the BMC schedule message (BMC_DRX_INFO). The new message bitmap is included in the SIB and transmitted to the UE 10. The SIB includes channel information (SCCPCH / FACH / CTCH) including 'RLC mode (Radio Link Control mode)', data rate (Max data rate, bps), 'TrCH type (Transport Channel)' and coding type. A new message bitmap is included, along with a value for a physical channel type (PhCh type).

The RRC 16 of the UE 10 that has received the SIB including the new message bitmap receives the RLC 18 based on the channel information and various configuration information based on the information included in the SIB. The environment is set (S18), the reception environment of the MAC 20 is set (S20), and the reception environment of the PHY 22 is set (S22). Accordingly, the UE 10, based on the reception period calculated through the SIB including the new message bitmap, turns off the power of the receiver when the reception period is not, and only during the period in which the corresponding CBS message is received. The power consumption can be saved by activating the receiving end.

When the BBS CBS message including the message ID is broadcasted from the BMC 34 of the RNC 30 of the wireless network, the BMC 14 of the UE 10 receives this (S24) and Appl 12 In step S26, the data index BMC-Data-IND is transmitted. Appl 12 processes and displays the received data so that the user is provided with the CBS service.

2 is a flowchart illustrating a control method of a mobile communication terminal according to the present invention, and illustrates a process of the UE 10 calculating a SFN of a CBS message to be received by the UE 10.

The UE 10 receives the SIB transmitted by the RNC 30 of the radio network to use the CBS service, which includes a new message bitmap, an allocation period of the logical channel CTCH, and a CBS frame offset. Information is included (P10).

The UE 10 configures a mapping table of the CTCH BS (Block Set) and the SFN by using the allocation period of the logical channel CTCH included in the SIB and the CBS frame offset (P12). The mapping table may be configured as shown in Table 1 below. Through the mapping table, the UE 10 may acquire a logical channel common traffic channel (CTCH) through which data is received and thereby physically synchronize a channel. For SFN.

<Table 1>

When the mapping table is configured, the new message bitmap information included in the SIB is checked. The new message bitmap provided by the RNC 30 is configured as shown in Table 2 below.

<Table 2>

As shown in Table 2, the new message bitmap includes the index of the CTCH BS. If the index value is "1", the CBS message exists, and if it is "0", the new message bitmap does not exist.

Accordingly, the UE 10 checks the CTCH BS in which the CBS message exists by comparing the new message bitmap <Table 2>, and confirms the SFN for physical synchronization with the corresponding CTCH BS through the mapping table of <Table 1>. The location of the SFN to receive the CBS message may be checked (P14).

Accordingly, the UE 10 receives the CBS message by activating the receiving end only in the corresponding period (P16).

As described above, according to the present invention, when the SIB is provided to the mobile communication terminal in the mobile communication system, whether the corresponding message is a newly broadcasted message or repeated transmission of a previously broadcasted message for each BMC message transmitted during the CBS schedule period. States that provide a new message bitmap. Therefore, the mobile communication terminal can calculate the SFN to check its CBS message immediately in the process of calculating the DRX through the SIB, which was consumed to check whether it is its CBS message every DRX cycle. You can save power.

As described above, the embodiment according to the present invention is not limited to the above, and various modifications can be made within the scope apparent to those skilled in the art in connection with the present invention.

As described above, the data transmission method of the mobile communication system and the control method of the mobile communication terminal according to the present invention, for each BMC message transmitted during the CBS schedule period when the SIB is provided to the mobile communication terminal in the mobile communication system A new message bitmap is provided to indicate whether the message is a newly broadcast message or a repetitive transmission of a previously broadcast message. The mobile communication terminal provides a new message bitmap through a SIB including a new message bitmap. It is to calculate DRX which can confirm CBS message.

Accordingly, the mobile communication terminal can immediately calculate the SFN for identifying its own CBS message during the level 1 process of calculating DRX through SIB, thus turning on the receiver by turning on the receiver only for its CBS message reception period. You can save.

Claims (4)

Receive a System Information Block (SIB) attached with a new message bitmap including SFN (System Frame Number) information to receive a CB S message from a mobile communication system providing a CBS (Cell Broadcast Short Message) service. Making a step; Constructing a mapping table of a CTCH block set (BS) and a system frame number (SFN) using an allocation period of a logical channel CTCH included in the SIB and a CBS frame offset; Identifying a CTCH BS in which a CBS message exists through the new message bitmap; Checking the SFN of the CTCH BS in which the CBS message exists in the mapping table; And activating a reception function of the CBS message in synchronization with a system frame number (SFN) in which the CBS message exists. The method of claim 1, Channel information (SCCPCH / FACH / CTCH) included in the SIB, 'RLC mode (Radio Link Control mode)', Max data rate (bps), 'TrCH type (Transport Channel)', Coding Type ), Further comprising the step of setting a reception environment according to a physical channel type (PhCh type). In the mobile communication system providing CBS (Cell Broadcast Short Message) service, the BMC schedule message of the broadcast / multicast control is checked to include S FN (System Frame Number) information to receive the CB S message. Extracting a New Message Bitmap parameter; And attaching the new message bitmap to a system information block (SIB) and broadcasting it to a mobile communication terminal. The method of claim 3, wherein The SIB includes channel information (SCCPCH / FACH / CTCH), 'RLC mode (Radio Link Control mode)', data rate (Max data rate, bps), 'TrCH type (Transport Channel)', coding type And data such as a physical channel type (PhCh type).

Images