KR20060096227A - Method for transmitting broadcast message in mobile communication system - Google Patents

Abstract

The present invention provides a method for transmitting a broadcast message applied to a case in which a second broadcast control channel (S-BCCH) for transmitting a broadcast message is not supported. In the case of transmitting enhanced broadcast page information through a first slot constituting a forward common control channel (F-CCCH) and the enhanced broadcast page information, The present invention relates to a method for transmitting a broadcast message, comprising: transmitting one broadcast message through at least one slot after n slots from the first slot. There is an effect that can be transmitted efficiently.

Broadcast message, forward common control channel (F-CCCH), enhanced broadcast page

Description

Method for transmitting broadcast message in mobile communication system {Method for Transmitting Broadcast Message in Mobile Communication System}

1 is a diagram illustrating an embodiment of a multi-slot enhanced broadcast paging scheme.

FIG. 2 is a diagram illustrating an embodiment of a periodic enhanced broadcast paging scheme. FIG.

3 is a diagram illustrating an embodiment of a multi-slot broadcast message transmission scheme.

4 is an explanatory diagram showing a first embodiment according to a periodic enhanced broadcast paging transmission scheme;

5 is an explanatory diagram showing a second embodiment according to a periodic enhanced broadcast paging transmission scheme;

FIG. 6 is an explanatory diagram showing a third embodiment according to a periodic enhanced broadcast paging transmission scheme; FIG.

The present invention relates to a broadcast message transmission method in a mobile communication system, and more particularly, to a method of transmitting a broadcast message through an F-CCCH.

A broadcasting message is transmitted in the form of broadcasting to all mobile stations or a specific group of mobile stations using a data burst message. Receivable mobile stations then receive the broadcast message via a specific reception mode.

In case of transmitting a broadcast message using a forward-common control channel (F-CCCH) and a second broadcast control channel (S-BCCH), F- Control information about a broadcast message to be transmitted is transmitted through the CCCH. For example, enhanced broadcast page information indicating whether a broadcast message is transmitted and a location where the broadcast message is transmitted on the S-BCCH is transmitted.

On the other hand, according to the prior art, the broadcast message is transmitted on the S-BCCH. Only an overhead message is transmitted through a primary-broadcast control channel (P-BCCH) (P-BCCH), and a broadcast message is not transmitted, and a broadcast message is not transmitted through an F-CCCH. The enhanced broadcast page information may be transmitted in a multi-slot enhanced broadcast paging scheme or a periodic enhanced broadcast paging scheme.

1 is a diagram illustrating an embodiment of a multi-slot enhanced broadcast paging scheme. The multi-slot enhanced broadcast paging scheme provides enhanced broadcast page information for a sufficient number of F-CCCH slots so that all mobile stations operating in a slotted mode can receive it. How to send. As shown in FIG. 1, when the maximum paging cycle period of the FCCH is 16 slots, enhanced broadcast page information may be continuously transmitted for 16 slots. Thus, all mobile stations receiving different slots on the FCCH can receive enhanced broadcast call information.

FIG. 2 is a diagram illustrating an embodiment of a periodic enhanced broadcast paging scheme. FIG. 2 is an example where BCAST_INDEX is 1; Information on whether to use the periodic enhanced broadcast paging method can be obtained through BCAST_INDEX of the MC-RR Parameters Message. For example, if the BCAST_INDEX value is '000', this means that the periodic enhanced broadcast call method is not used. On the other hand, if the BCAST_INDEX value is not '000', a periodic enhanced broadcast calling method having a broadcast call cycle period of (B + 7) is used. B is determined by Equation 1.

B = 2 ^{1 + i} × 16 1≤i≤7

In Equation 1, i represents a BCAST_INDEX value transmitted through the MC-RR Parameters Message.

In FIG. 2, since BCAST_INDEX is 1, B is 64 according to Equation 1, and the broadcast call cycle period is 71. Enhanced Broadcast Page information is transmitted on the first F-CCCH slot of a broadcast call cycle. Enhanced Broadcast Page information includes BCCH_INDEX and TIME_OFFSET. That is, the S-BCCH through which the broadcast message is actually transmitted and the transmission time of the broadcast message can be known through the enhanced broadcast call information.

That is, the plurality of BCCHs are distinguished by a broadcast control channel number (hereinafter, referred to as 'BCN'). The BCN of the P-BCCH has a value of 1 and the S-BCCH has a value of 2 to 8. The broadcast message is transmitted through S-BCCH having a BCN value of BCCH_INDEX + 1 after 40 × (1 + TIME_OFFSET) ms based on a time point when enhanced broadcast call information is transmitted.

As described above, in order to transmit a broadcast message, enhanced broadcast page information indicating whether a broadcast message is transmitted and a broadcast message transmission position must be transmitted through an F-CCCH. The actual broadcast message is transmitted through the S-BCCH. However, there is a problem in that the actual broadcast message cannot be directly transmitted through the F-CCCH.

An object of the present invention is to provide a method for transmitting a broadcast message through an F-CCCH in a mobile communication system.

The present invention provides a method for transmitting a broadcast message applied when a second broadcast control channel (S-BCCH) for transmitting a broadcast message is not supported. Checking whether or not to use a broadcast paging scheme and, when used, transmitting at least one broadcast message through a first unit slot forming a forward common control channel (F-CCCH). It comprises a step.

In addition, the present invention provides a method for transmitting a broadcast message applied when a second broadcast control channel (S-BCCH) for transmitting a broadcast message is not supported. Checking whether the Periodic Enhanced Broadcast Paging (FIC) scheme is used, and if the test result is used, one through at least one consecutive unit slot forming a forward common control channel (F-CCCH). It comprises the step of transmitting a broadcast message.

In addition, the present invention provides a method for transmitting a broadcast message applied when a second broadcast control channel (S-BCCH) for transmitting a broadcast message is not supported. Checking whether or not to use Periodic Enhanced Broadcast Paging (Enhanced Broadcast Paging) method, and if used, Enhanced broadcast call (Enhanced) through the first slot forming a Forward-Common Control Channel (F-CCCH), if used Transmitting broadcast page information and transmitting one broadcast message through at least one slot after n slots from the first slot according to the enhanced broadcast page information.

In addition, the present invention is to check whether the second broadcast control channel (S-BCCH; Secondary-Broadcast Control Channel) support for transmitting a Broadcasting message (B-BCH) and if not supporting the second broadcast control channel, forward And repeatedly transmitting the same broadcast message through each unit slot constituting a forward control channel (F-CCCH).

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.

The mobile station needs to know whether the S-BCCH for supporting broadcast messages is supported. Information on whether the S-BCCH is supported may be obtained through a NUM_BCCH_BCAST value included in an MC-RR parameter message. For example, if the NUM_BCCH_BCAST value is '000', it is determined that S-BCCH for transmitting a broadcast message is not supported. Can be. The present invention can be applied when the S-BCCH for transmitting a broadcast message is not supported, that is, when the NUM_BCCH_BCAST value is '000'.

If S-BCCH is not supported for broadcasting message transmission, multi-slot broadcast message transmission and periodic enhanced broadcast paging is used to transmit broadcast messages directly through F-CCCH. ) Transmission method can be used.

3 is a diagram illustrating an embodiment of a multi-slot broadcast message transmission scheme. 3 shows an example of a multi-slot broadcast message transmission scheme applied when the maximum paging cycle period is 16 slots. As shown in Fig. 3, the multi-slot broadcast message scheme repeatedly broadcasts through enough F-CCCH slots to be received by all mobile stations operating in the slotted mode. How to send a message. Therefore, the multi-slot broadcast message transmission scheme can be applied when the broadcast message can be transmitted through one F-CCCH slot.

As shown in FIG. 3, when a base station transmits a broadcast message continuously during F-CCCH 16 slots, each mobile station stably transmits a broadcast message even when each mobile station in a cell receives the F-CCCH through a different slot. Can be received.

4 is an explanatory diagram showing a first embodiment according to a periodic enhanced broadcast paging transmission scheme. FIG. 4 illustrates an example in which a BCAST_INDEX value transmitted through an MC-RR Parameters Message is 1 and three broadcast messages are transmitted through one slot. As shown in FIG. 4, when the broadcast messages to be transmitted can be transmitted through one slot, the broadcast messages may be transmitted through the first slot of a broadcast page cycle. In the present embodiment, it is not necessary to separately transmit information for indicating which message is transmitted through which slot on the F-CCCH, that is, enhanced broadcast page information.

5 is an explanatory diagram showing a second embodiment according to a periodic enhanced broadcast paging transmission scheme. FIG. 5 illustrates an example in which a BCAST_INDEX value transmitted through an MC-RR Parameters Message is 1 and a length of a broadcast message has a length that can be transmitted through three slots. As shown in FIG. 5, when there is only one broadcast message to be transmitted and one broadcast message is to be transmitted through three slots, the broadcast message may be transmitted using three slots consecutively from the first slot. Even in the present embodiment, it is not necessary to separately transmit the enhanced broadcast page information.

6 is an explanatory diagram showing a third embodiment according to a periodic enhanced broadcast paging transmission scheme. FIG. 6 illustrates an example in which a BCAST_INDEX value transmitted through an MC-RR Parameters Message is 1 and three broadcast messages are transmitted. This embodiment can be applied when there is more than one broadcast message to be transmitted and each broadcast message has a length such that it cannot be transmitted through one slot.

As shown in FIG. 6, enhanced broadcast page information indicating whether a broadcast message is transmitted and a location on which the broadcast message is transmitted on the F-CCCH through the first slot of a broadcast page cycle. Is transmitted, and broadcast messages corresponding to each enhanced broadcast call should be transmitted after n slots. That is, a broadcast message corresponding to the first enhanced broadcast call is transmitted after n slots, a broadcast message corresponding to the second enhanced broadcast call is transmitted after 2n, and a broadcast message corresponding to the third enhanced broadcast call is transmitted after 3n slots, k The broadcast message corresponding to the -th enhanced broadcast call is transmitted after k × n slots.

Fig. 6 shows an example where n is 7. As shown in FIG. 6, since there are three broadcast messages to be transmitted and n is 7, a broadcast message corresponding to the first enhanced broadcast call is transmitted after 7 slots, and a broadcast message corresponding to the second enhanced broadcast call is transmitted after 14 slots. The broadcast message corresponding to the third enhanced broadcast call is transmitted after 21 slots. As shown in Fig. 6, in the third embodiment, n can be set to 7.

The enhanced broadcast call information may be transmitted through a general page message (GPM) or universal page message (UPM). Table 1 shows an example of the format of the GPM according to the present invention.

GPM Commom Fields: Field Length (bits) CONFIG_MSG_SEQ 6 ACC_MSG_SEQ 6 CLASS_0_DONE One CLASS_1_DONE One TMSI_DONE One ORDERED_TMSIS One BROADCAST_DONE One RESERVED 4 ADD_LENGTH 3 ADD_PFIELD 8 x ADD_LENGTH

PDU Format for a mobile station-addressed page:

Field Length (bits) SERVICE_OPTION 0 or 16

PDU Format for broadcast page: There is no Layer 3 field associated with this record.

PDU Format for an enhanced broadcast page when NUM_BCCH_BCAST ≠ '000':

Field Length BCCH_INDEX 3 TIME-OFFSET 10 REPEAT_TIME_OFFSET 0 or 5 ADD_BCAST_RECORD 0 or 8 x EXT_BCAST_SDU_LENGTH

PDU Format for an enhanced broadcast page when NUM_BCCH_BCAST = '000'; There are no Layer 3 fields associated with this record.

Table 2 shows an example of the format of the UPM according to the present invention.

UPM Common Field Field Length (bits) CONFIG_MSG_SEQ 6 ACC_MSG_SEQ 6 READ_NEXT_SLOT One READ_NEXT_SLOT_BCAST One

PDU Format for a mobile station-addressed page:

Field Length (bits) SERVICE_OPTION 0 or 16 ADD_MS_RECORD 0 or 8 x EXT_BCAST_SDU_LENGTH

PDU Format for a mobile station-directed message announcement: There are no Layer 3 fields associated with this record.

PDU Format for an enhanced broadcast page when NUM_BCCH_BCAST ≠ '000':

Field Length BCCH_INDEX 3 TIME-OFFSET 10 REPEAT_TIME_OFFSET 0 or 5 ADD_BCAST_RECORD 0 or 8 x EXT_BCAST_SDU_LENGTH

PDU Format for an enhanced broadcast page when NUM_BCCH_BCAST = '000'; There are no Layer 3 fields associated with this record.

As shown in Table 1 and Table 2, when the NUM_BCCH_BCAST value is not '000', since the S-BCCH for broadcasting message transmission exists, information for receiving the S-BCCH is transmitted. However, when the NUM_BCCH_BCAST value is '000', there is no S-BCCH for transmitting a broadcast message, and since the broadcast message is transmitted through the F-CCCH according to the present invention, it is not necessary to transmit information for the broadcast message.

Table 3 shows another example of the format of the GPM according to the present invention.

GPM Common Field: Field Length (bits) CONFIG_MSG_SEQ 6 ACC_MSG_SEQ 6 CLASS_0_DONE One CLASS_1_DONE One TMSI DONE One ORDERED_TMSIS One BROADCAST_DONE One RESERVED 4 ADD_LENGTH 3 ADD_PFIELD 8 × ADD_LENGTH

PDU Format for a mobile station-addressed page:

Field Length (bits) SERVICE_OPTION 0 or 16

PDU Format for a broadcast page: There are no Layer 3 fields associated with this record.

PDU Format for an enhanced broadcast page:

Field Length (bits) BCCH_INDEX 3 TIME_OFFSET 10 REPEAT_TIME_OFFSET 0 or 5 ADD_BCAST_RECORD 0 or 8 × EXT_BCAST-SDU_LENGTH

The corresponding field of 'PDU Format for an enhanced broadcast page' of Table 3 has different information depending on whether S-BCCH is supported, that is, whether NUM_BCCH_BCAST value is '000'. In more detail, when the NUM_BCCH_BCAST value is not '000', the base station sets the corresponding field of the 'PDU Format for an enhanced broadcast page' to a valid value according to a transmission type of a broadcast message. On the other hand, the mobile station also receives the broadcast message using the transmitted valid value.

On the other hand, when the NUM_BCCH_BCAST value is '000', the base station may set the corresponding field of the 'PDU Format for an enhanced broadcast page' to a value not currently used, or to a meaningless default value. In this case, the mobile station determines the field as an invalid value and does not use it for reception of a broadcast message.

For example, when the NUM_BCCH_BCAST value is '000', the base station may set the BCCH_INDEX value to a value not currently used, such as '000'. Meanwhile, the TIME_OFFSET value can be set to a meaningless value such as '0000000000'. In addition, the REPEAT_TIME_OFFSET value and the ADD_BCAST_SDU_LENGTH value can be omitted by setting EXT_BCAST_SDU_LENGTH_IND to '00'.

Table 4 shows another example of the format of the UPM according to the present invention.

UPM Common Field: Field Length (bits) CONFIG_MSG_SEQ 6 ACC_MSG_SEQ 6 READ_NEXT_SLOT One READ_NEXT_SLOT_BCAST One

PDU Format for a mobile station-addressed page:

Field Length (bits) SERVICE OPTION 16 ADD_MS_RECORD 0 or 8 × EXT_BCAST-SDU_LENGTH

PDU Format for a mobile station-directed message announcement: There are no Layer 3 fields associated with this record.

PDU Format for an enhanced broadcast page:

Field Length (bits) BCCH_INDEX 3 TIME_OFFSET 10 REPEAT_TIME_OFFSET 0 or 5 ADD_BCAST_RECORD 0 or 8 × EXT_BCAST-SDU_LENGTH

The corresponding field of 'PDU Format for an enhanced broadcast page' of Table 4 has different information depending on whether S-BCCH is supported, that is, whether NUM_BCCH_BCAST value is '000' or not. For example, when the NUM_BCCH_BCAST value is not '000', the base station sets the corresponding field of the 'PDU Format for an enhanced broadcast page' to a valid value according to the transmission type of the broadcast message. On the other hand, the mobile station also receives the broadcast message using the transmitted valid value.

On the other hand, when the NUM_BCCH_BCAST value is '000', the base station may set the corresponding field of the 'PDU Format for an enhanced broadcast page' to a value not currently used, or to a meaningless default value. In this case, the mobile station determines the field as an invalid value and does not use it for reception of a broadcast message.

For example, when the NUM_BCCH_BCAST value is '000', the base station may set the BCCH_INDEX value to a value not currently used, such as '000'. Meanwhile, the TIME_OFFSET value can be set to a meaningless value such as '0000000000'. In addition, the REPEAT_TIME_OFFSET value and the ADD_BCAST_SDU_LENGTH value can be omitted by setting EXT_BCAST_SDU_LENGTH_IND to '00'.

In the periodic enhanced broadcast call method as described above, if the same broadcast message or the same enhanced broadcast call information is to be retransmitted, it should be transmitted within a predetermined time from the transmission start point of the first broadcast message or enhanced broadcast call information. For example, it should be transmitted within a (4 × (B + 7)) slot.

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

According to the present invention, even when the S-BCCH is not provided, the broadcast message can be efficiently transmitted through the F-CCCH.

Claims (14)

In the method of transmitting a broadcast message applied when a second broadcast control channel (S-BCCH) for transmitting a broadcast message is not supported. Checking whether to use a periodic enhanced broadcast paging scheme; And Transmitting, when used, at least one broadcast message through a first unit slot forming a forward common control channel (F-CCCH). Broadcast message transmission method comprising a. The method of claim 1, And information on whether to use the periodic enhanced broadcast call method is transmitted through an MC-RR Parameters Message. In the method of transmitting a broadcast message applied when a second broadcast control channel (S-BCCH) for transmitting a broadcast message is not supported. Checking whether to use a periodic enhanced broadcast paging scheme; And As a result of the checking, when used, transmitting one broadcast message through at least one contiguous unit slot forming a forward common control channel (F-CCCH) Broadcast message transmission method comprising a. The method of claim 3, wherein And information on whether to use the periodic enhanced broadcast call method is transmitted through an MC-RR Parameters Message. The method of claim 4, wherein The at least one consecutive unit slot is a broadcast message transmission method, characterized in that the starting point is the first unit slot forming the forward common control channel. In the method of transmitting a broadcast message applied when a second broadcast control channel (S-BCCH) for transmitting a broadcast message is not supported. Checking whether to use a periodic enhanced broadcast paging scheme; Transmitting the enhanced broadcast page information through a first slot forming a forward common control channel (F-CCCH) as a result of the check; And Transmitting one broadcast message through at least one slot after n slots from the first slot according to the enhanced broadcast page information; Broadcast message transmission method comprising a. The method of claim 6, N is 7, characterized in that the broadcast message transmission method. The method of claim 6, And transmitting at least one different broadcast message at intervals of n slots from the first slot according to the enhanced broadcast call information. The method of claim 8, Each broadcast message transmitted in the n slot intervals is transmitted using at least one slot. The method of claim 6, The enhanced broadcast call information is transmitted using a general page message (GPM) or a universal page message (UPM). The method of claim 10, And a field indicating enhanced broadcast call information of the general call message or the general call message is set to an invalid value. The method of claim 11, The field indicating the enhanced broadcast call information includes a field indicating a broadcast control channel through which a broadcast message is transmitted, a field indicating a time point at which a broadcast message is transmitted through the broadcast control channel, and a field indicating a length of an extended broadcast field. The field indicating the broadcast control channel is set to '000', the transmission time value is set to '0000000000', and the field indicating the extended broadcast field length is set to '00'. . Checking whether to support a second broadcast control channel (S-BCCH) for transmitting a broadcasting message; And If the second broadcast control channel is not supported, repeatedly transmitting the same broadcast message through each unit slot forming a forward common control channel (F-CCCH). Broadcast message transmission method comprising a. The method of claim 10, The broadcast message is a broadcast message transmission method, characterized in that it has a length that can be transmitted through the one unit slot.

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