JP6401271B2 - Second report delivery method, apparatus and eNB by alarm system - Google Patents

Description

  The present invention relates to information distribution technology in the field of mobile communication, and more particularly to a second report distribution method, apparatus, and evolved base station (eNB: evolved Node B) using an alarm system (ETWS: Earthquake and Tsunami Warning System).

  Conventionally, a terrestrial public mobile communication network (PLMN) provider has provided an earthquake and tsunami warning distribution service to users through an ETWS system based on a long term evolution (LTE) network, A schematic diagram of an LTE ETWS network structure operated by a conventional PLMN carrier is shown in FIG. The ETWS according to LTE usually includes an eNB, a mobility management entity (MME), a cell broadcast center (CBC) and a cell broadcast entity (CBE). .

  A message exchange sequence that triggers each associated network element of a conventional ETWS is shown in FIG. The realization process of alarm notification by ETWS transmits an alarm message from CBE, the alarm message e reaches the eNB via CBC and MME, and the eNB receives the first alarm message based on the identifier of the alarm message. Whether it is a report or a second report. If it is the first report, it broadcasts a system information block type 10 (SIB10: System Information Block Type 10) to transmit the received alarm message, In the case of two reports, the received alarm message is transmitted by broadcasting the system information block type 11 (SIB11). That is, the alarm message transmitted by broadcasting the SIB 10 is the first report (Primary Notification), and the alarm message transmitted by broadcasting the SIB 11 is the second report (Secondary Notification). The first report is to notify that an earthquake or tsunami will occur soon, and the second report is to notify information after the disaster has occurred, such as where food and water can be obtained. A user terminal (UE: User Equipment) that has received the notification notifies the user of earthquake or tsunami warning information by text, voice, vibration, or the like.

  In the prior art, as a second report delivery method by ETWS from the eNB to the UE, the eNB receives an alarm message transmitted by the MME, and if the alarm message is the second report of the ETWS, an instruction from the ETWS is included. SIB1 and SIB11 messages including paging message and SIB11 scheduling information are transmitted. According to such a distribution method, the paging message including the instruction from the ETWS, SIB1 and SIB11 are repeatedly transmitted until the transmission of the entire SIB11 is completed, and thus there is a disadvantage that bandwidth is wasted. .

  In view of this, the embodiment of the present invention saves bandwidth, greatly reduces the number of transmissions of the SIB 11, and ensures that the UE receives the entire SIB 11, and the second report delivery method, apparatus, and eNB by ETWS I will provide a.

In order to achieve the above object, the technical means of the present invention are realized as follows.
In a default paging cycle that is a cycle before SIB11 is transmitted in the SIB11 transmission cycle, a paging message including an instruction from ETWS and a system information block SIB1 including SIB11 scheduling information are transmitted.
After the default paging cycle, once send the SIB1 separately,
In the SIB11 transmission cycle, only the SIB11 is transmitted without transmitting the SIB1.

  In the said aspect, the said SIB11 period transmission is transmitting SIB11 only for 1 round in one SIB11 transmission period.

  In the above aspect, the SIB11 transmission period is carried by a repetitive periodic cell in the ETWS alert message.

  In the above aspect, the periodic transmission starts transmission of SIB11 from the first fragment, transmits only one fragment for each SI (system information) period, transmits the next fragment in the next SI period, This includes repeating until the last fragment is transmitted.

  In the above aspect, the set value of the SI period is 80 ms, 160 ms, and 320 ms.

Examples of the present invention are:
In a default paging cycle that is a cycle before SIB11 is transmitted in the SIB11 transmission cycle, a paging message including an instruction from ETWS and SIB1 including SIB11 scheduling information are transmitted, and after the default paging cycle, A transmission unit configured to transmit the SIB1 separately, and transmit only the SIB11 without transmitting the SIB1 in the SIB11 transmission period;
A first timing unit configured to time one SIB11 transmission period;
The present invention further provides an ETWS second report delivery apparatus including a second timing unit configured to timing one default paging cycle.

  In the above aspect, the SIB11 transmission period is carried by a repetitive periodic cell in the ETWS alert message.

  In the above aspect, the transmission unit is used to complete one round of SIB11 transmission and the SIB11 period transmission in the first SIB11 transmission period, and includes the following processes. Includes starting SIB11 transmission from the first fragment, transmitting only one fragment for each SI period, transmitting the next fragment in the next SI period, and thus repeating the transmission of the last fragment It is.

  In the above aspect, the set value of the SI period is 80 ms, 160 ms, and 320 ms.

  The embodiment of the present invention further provides an eNB including the second report delivery apparatus using the ETWS.

  The second report delivery method, apparatus, and eNB by ETWS according to the embodiment of the present invention include a paging message including an instruction from ETWS and SIB11 scheduling information before SIB11 is transmitted in the first SIB11 transmission cycle. SIB1 to be transmitted in advance and repeated in one default paging cycle, and then SIB1 including the SIB11 scheduling information is retransmitted once, thereby completing one round of SIB11 transmission in the first SIB11 transmission cycle, Periodic transmission of SIB11 is started from the SIB11 transmission period. In this way, it is possible to save bandwidth and greatly reduce the number of SIB11 transmissions, and to ensure that the UE receives the entire SIB11, further improving the reliability of ETWS.

It is a schematic diagram of the network structure of the ETWS system for LTE networks which the conventional PLMN provider operates. FIG. 6 is a message exchange sequence diagram for triggering each related network element of a conventional ETWS. It is an implementation | achievement flowchart of the 2nd report delivery method by ETWS which concerns on the Example of this invention. It is a structure schematic diagram of the 2nd report delivery apparatus by ETWS which concerns on the Example of this invention. It is a concrete flowchart of realization of the 2nd report distribution method by ETWS concerning the example of the present invention. It is a schematic diagram of the process of transmitting SIB1 and SIB11 including a paging message including an instruction from ETWS and SIB11 scheduling information after the eNB according to the embodiment of the present invention receives the ETWS message.

  Regarding specific application, when the second report by ETWS is transmitted from the eNB to the UE, waste of bandwidth may be reduced by the periodic transmission method. However, in the periodic transmission method, the SIB 11 is transmitted only for one round per period. For this reason, the eNB transmits the SIB 11, but the UE may not receive a paging message including an instruction from the ETWS. Therefore, if only the periodic transmission method is employed, there is a problem in terms of reliability. Therefore, in the process of delivering the second report message by the ETWS from the eNB to the UE, the eNB appropriately controls the timing of transmitting the paging message including the instruction from the ETWS and the SIB1 and SIB11 including the SIB11 scheduling information.

  In the embodiment of the present invention, when the warning message is the second report by ETWS, before the SIB 11 is transmitted in the first SIB 11 transmission period, the paging message including the instruction from the ETWS and the SIB 11 scheduling information are included. SIB1 to be transmitted in advance and repeated in one default paging cycle, then SIB1 including the SIB11 scheduling information is retransmitted once, and then one round of SIB11 transmission in the first SIB11 transmission cycle is completed. Periodic transmission of SIB11 is started from the SIB11 transmission period.

  Here, the paging including the instruction from the ETWS and the SIB1 including the SIB11 scheduling information are continuously transmitted from the time when the eNB receives the ETWS warning message to the end of the transmission of the SIB11.

  Hereinafter, the present invention will be described in more detail with reference to the drawings and specific examples.

  FIG. 3 is a flowchart for realizing the second report delivery method by ETWS according to the embodiment of the present invention. As shown in FIG. 3, the following steps are included.

Step S100: When the warning message is the second report of ETWS, the paging message including the instruction from the ETWS and the SIB11 scheduling in the default paging cycle, which is the cycle before the SIB11 is transmitted in the SIB11 transmission cycle by the eNB SIB1 including the information is transmitted.
Here, the SIB11 transmission period is carried by a repetitive periodic cell in the ETWS alarm message, and the SIB11 transmission period is at the second level.

  Step S101: The SIB1 is sent separately once after the default paging cycle.

Step S102: In the SIB11 transmission cycle, only the SIB11 is transmitted without transmitting the SIB1.
Regarding step S102, specifically, in the first SIB11 transmission cycle, only the SIB11 is periodically transmitted without transmitting the SIB1, and similarly, the SIB1 is not transmitted in the second SIB11 transmission cycle. Only SIB11 is transmitted periodically.

  Preferably, when there are more SIB11 transmission periods, only SIB11 is periodically transmitted without transmitting SIB1 in the other SIB11 transmission periods as well.

  Here, the SIB11 period transmission means that the SIB11 is transmitted only for one round every SIB11 transmission period.

  Transmitting only the SIB11 in the SIB11 transmission cycle specifically includes the following processes. The transmission of SIB11 is started from the first fragment, and only one fragment is transmitted for each system information (SI: System Information) period, and the next fragment is transmitted in the next SI period. It includes repeating until the transmission of the fragment.

  Here, the SI period is a transmission period of the SIB itself, and each SI period includes only one SI window, and only one SIB11 fragment is transmitted for each SI period. The set value of the SI period is 80 ms. 160 ms, 320 ms, etc.

FIG. 4 is a schematic view of the structure of a second report delivery apparatus using ETWS according to an embodiment of the present invention. As shown in FIG. 1 timing unit 11 and 2nd timing unit 12 are included,
The transmission unit 10 transmits a paging message including an instruction from the ETWS and an SIB1 including SIB11 scheduling information once in a default paging cycle which is a cycle before the SIB11 is transmitted in the SIB11 transmission cycle. The SIB1 is sent separately, and in the transmission cycle of the SIB11, the SIB1 is not transmitted, and only the SIB11 is transmitted.
Here, the SIB11 period transmission means that the SIB11 is transmitted only for one round every SIB11 transmission period.

  Here, the transmission unit 10 is used to complete one round of SIB11 transmission and SIB11 period transmission in the first SIB11 transmission period, and specifically includes the following processes. . It includes starting SIB11 transmission from the first fragment, transmitting only one fragment per SI period, transmitting the next fragment in the next SI period, and thus repeating until the last fragment is transmitted It is.

  The SI period is a transmission period of the SIB itself, and includes only one SI window for each SI period, and transmits only one SIB11 fragment for each SI period. The set values of the SI period are 80 ms, 160 ms, 320 ms, etc. It may be.

  The first timing unit 11 is for timing one SIB11 transmission cycle.

  Here, the SIB11 transmission period is carried by a repetitive periodic cell in the ETWS alert message, and all the SIB11 transmission periods are at the second level.

  The second timing unit 12 is for timing one default paging cycle.

  For specific application, the transmission unit 10 is constituted by a central processing unit (CPU), a microprocessor (MPU), a digital signal processor (DSP), or a field programmable gate array (FPGA) in the eNB, and the first timing Both the unit 11 and the second timing unit 12 can be constituted by a timer.

  Since the second report delivery apparatus using the ETWS may be attached to an eNB, the embodiment of the present invention further provides an eNB. The eNB includes a second report delivery device using ETWS, and the specific configuration of the second report delivery device using ETWS and the functions of the components are the same as those shown in FIG.

  FIG. 5 is a flowchart for concretely realizing the second report delivery method by ETWS according to the embodiment of the present invention, and the method includes the following steps.

Step S200: The eNB activates the first timing unit 11 when receiving the alarm rewriting request transmitted by the MME and determining that the content cell including the data encoding method or the alarm message is the second report.
Here, the warning rewriting request is an ETWS warning message.
Here, the first timing unit 11 is for timing one SIB11 transmission cycle, and the SIB11 transmission cycle is carried by a repetitive periodic cell in the ETWS alarm message, and both SIB11 transmission cycles are at the second level. is there.

Step S201: The eNB transmits a paging message including an instruction from the ETWS and an SIB1 including SIB11 scheduling information before the SIB11 is transmitted in the first SIB11 transmission period, and in one default paging period. repeat.
Here, one default paging cycle is timed by the second timing unit 12.
Furthermore, until the eNB receives the ETWS warning message and transmits the entire SIB 11, the paging including the instruction from the ETWS and the SIB 1 including the SIB 11 scheduling information are continuously transmitted.
Here, after receiving the paging message including the instruction from the ETWS, the UE immediately receives the SIB1 including the SIB11 scheduling information at the nearest SIB1 transmission time. Based on the SIB1 scheduling information list in the base station system message, the UE receives the SIB 11 including the second ETWS report in the base station system message.

Step S202: SIB1 including SIB11 scheduling information is retransmitted once.
Here, by retransmitting the SIB1 including the SIB11 scheduling information once, it is possible to ensure that all UEs belonging to the cell receive the SIB1 including the SIB11 scheduling information and start preparing to receive the SIB11.

Step S203: One round of SIB11 transmission is completed in the first SIB11 transmission cycle.
Specifically, transmission of SIB11 is started from the first fragment, only one fragment is transmitted every SI period, the next fragment is transmitted in the next SI period, and thus the last fragment is transmitted. Until the next SIB11 transmission cycle starts, the next round of SIB11 transmission is started so as to start transmission from the first fragment.

Step S204: When the first timing unit 11 times out, the next SIB11 transmission cycle is entered, the first timing unit 11 is set again, and the step S203 is repeated until the SIB11 is transmitted with a sufficient number of cycles. S205 is executed.
Here, in the next SIB11 transmission cycle, it is not necessary to transmit the paging message including the instruction from the ETWS and the SIB1 including the SIB11 scheduling information in advance, and the SIB11 may be transmitted immediately.
Here, the number of SIB11 transmission cycles is the number of broadcast billing cells in the warning rewriting message.

  Step S205: The transmission of the paging message including the instruction from the ETWS, the SIB1 including the SIB11 scheduling information, and the SIB11 is stopped, and at that time, the content of the SIB1 is updated to the SIB1 including no SIB11 scheduling information.

Step S206: After the SIB11 transmission is stopped, the paging message including the SI update instruction is transmitted in one modification period, and the UE is notified that the SIB1 including no SIB11 scheduling information is received.
Here, if the interval from the transmission start time of the paging message including the SI update instruction to the boundary of the correction period is longer than one default paging period, the paging message including the SI update instruction is transmitted until the end of the correction period. If the interval from the transmission start time of the paging message including the SI update instruction to the boundary of the correction period is less than one default paging period, the paging message including the SI update instruction is set to one paging correction period. It is necessary to transmit additionally, that is, until the next correction cycle is completed.

  As will be understood from the above description, there is no particular limitation on the transmission start time of the paging message including the instruction from the ETWS, there is no need to start transmission at the boundary of the paging correction period, and the transmission start time of the SIB 11 is There is no need to start from the boundary of the paging correction cycle, and it is only necessary to ensure that a paging message including an instruction from the ETWS is transmitted in at least one default paging cycle before the transmission of the SIB 11 is started.

5 and FIG. 5 above, a paging message including an instruction from the ETWS after the eNB receives the ETWS message in the embodiment of the present invention, based on a specific flowchart for realizing the second report delivery method using the ETWS. The process of transmitting SIB1 and SIB11 including SIB11 scheduling information is shown in FIG.
In order, SIB11 is transmitted from the first fragment, that is, fragment 0 to the last fragment, and one round of SIB11 transmission is completed.

  In FIG. 6, P1 and P2 are SIB11 transmission cycle 1 and SIB11 transmission cycle 2, respectively. Similarly, s0 and s1 are fragment 0 and fragment 1 of SIB11, respectively, and sn is the last fragment of SIB11.

  T0 is a time at which the eNB transmits an ETWS paging message and SIB1 including SIB11 scheduling information after receiving the ETWS message, and is also a start time of P1.

  T1 is a time to transmit SIB1 again after transmitting a paging message and SIB1 in advance in one default paging cycle t in the period of P1, and starts transmission of SIB11 from this time. SIB11 is transmitted from fragment s0 to the last fragment sn, one round of SIB11 transmission is completed, and then another round of SIB11 is transmitted in SIB11 transmission period P2.

  T2 is SIB11 stop time, that is, after transmitting SIB11 with a sufficient number of cycles, transmission of SIB1 and SIB11 including ETWS paging message and SIB11 scheduling information is stopped, and transmission of SI update paging is performed in one correction cycle. Start and notify the UE to update the time of SIB1 that does not include SIB11 scheduling information.

  In FIG. 6, SIB11 is transmitted only for one round in both SIB11 transmission cycle P1 and SIB11 transmission cycle P2. This is only an embodiment of the present invention, and in a specific application, SIB11 may be transmitted two or more rounds according to needs for channel resources and reliability.

  The above are only preferred embodiments of the present invention, and do not limit the protection scope of the present invention.

Claims (8)

Transmitting a paging message including an instruction from the ETWS and a system information block SIB1 including SIB11 scheduling information in a default paging cycle that is a cycle before the SIB11 is transmitted in the SIB11 transmission cycle;
And that prior to each Symbol SIB11 transmission cycle, prior to sending the SIB11 after the default paging cycle, transmits the SIB1 again,
When sending S IB11, and transmitting only the SIB11 without transmitting the SIB1,
The second report delivery method by the earthquake and tsunami warning system ETWS.   The method according to claim 1, wherein the SIB11 period transmission is to transmit the SIB11 only for one round for each SIB11 transmission period.   The periodic transmission starts transmission of SIB11 from the first fragment, transmits only one fragment per system information (SI) period, transmits the next fragment in the next SI period, and finally The method of claim 1, comprising repeating until the transmission of a fragment.   The method according to claim 3, wherein the set value of the SI period is 80 ms, 160 ms, and 320 ms. In default paging cycle is the period before the at SIB11 transmission cycle SIB11 is transmitted, a paging message containing an instruction from the ETWS, transmits the SIB1 including the SIB11 scheduling information, for each pre-Symbol SIB11 transmission cycle, wherein before sending the SIB11 after default paging cycle, and sends the SIB1 again, when transmitting the S IB11, and configured transmission unit to transmit only the SIB11 without transmitting the SIB1,
A first timing unit configured to time one SIB11 transmission period;
A second timing unit configured to timing one default paging cycle;
The second report distribution device by ETWS including.   The transmission unit starts transmitting SIB11 from the first fragment, transmits only one fragment per SI period, transmits the next fragment in the next SI period, and thus transmits the last fragment. The apparatus of claim 5, configured to repeat until.   The apparatus according to claim 6, wherein the set value of the SI period is 80 ms, 160 ms, and 320 ms.   An evolved base station eNB including the second report delivery device by ETWS according to any one of claims 5 to 7.

Images