JP2006279342A - Transmission data updating method, program, device and system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make transmission after the designated transmission start timing without being affected by timing at which a broadcast information updating request is received and the transmission SFN of the updated transmission data in a broadcast information updating operation in a W-CDMA radio base station device. <P>SOLUTION: Two storage buffers, an active storage buffer and a stand-by storage buffer, for storing broadcast information transmission data are provided, broadcast information transmission data are stored in a stand-by buffer at timing at which a broadcast information updating request is received, and it is achieved by determining from transmission start timing whether data to be transmitted at each SFN timing are stored in the active storage buffer or in the stand-by storage buffer. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a transmission data update method, program, apparatus, and system in broadcast information transmission of a W-CDMA radio base station apparatus.

  In the W-CDMA radio base station apparatus, broadcast information carrying various control information as transmission data is constantly transmitted to mobile devices in the base station area. The broadcast information is frequently updated according to an instruction from the upper station, a wireless communication state, and the like.

  In addition, the broadcast information is subjected to transmission timing control based on SFN (System Frame Number), and each transmission data is designated with an SFN to be transmitted. Therefore, the transmission data is updated in consideration of the transmission timing. There is a need to.

Here, patent documents using SFN are listed.
In Patent Document 1, two units, an active system and a standby system, are prepared for the purpose of stabilizing the system, and the SFN is used for distinguishing information transmission frames and setting timeout values.
US Pat. No. 6,567,376

  The broadcast information is updated periodically according to an instruction from the upper station, and the next update is performed after all data of the updated broadcast information is transmitted. However, the next update may be performed before transmission of all transmission data of the previous broadcast information is completed due to a request from a higher station, a state of wireless communication, or the like.

  In this case, a method of directly rewriting the transmission data storage area prepared for each transmission timing is conceivable. However, since the data currently undergoing transmission processing is rewritten, it is possible to control the timing at which new notification information becomes valid. I can't.

  The present invention examines the above-described problem, and provides a transmission data update method that considers the timing at which transmission data is valid by making the transmission data storage area prepared for each transmission timing into two planes. Objective.

  In order to achieve the above object, the present invention has a two-sided configuration of a buffer for holding transmission data of broadcast information received from a higher-level station, a working system (first storage area) and a standby system (second storage area). In addition, in order to control the transmission start timing, each buffer is configured to hold transmission timing in addition to transmission data.

  The active buffer for holding the transmission data is a buffer for storing transmission data of broadcast information currently being transmitted, and the transmission stored in the active buffer unless broadcast information is updated. Continue to transmit data at each SFN timing. The standby transmission data storage buffer is a temporary standby buffer at the time of broadcast information update, and is temporarily stored in the standby buffer at the time of broadcast information update. After that, when reaching the transmission start timing of the transmission data, it is stored in the working buffer, and thereafter, transmission is continued at each SFN timing as transmission data of the working buffer.

  Data update processing is performed as follows. If the SFN value (first transmission timing) is earlier than the transmission start timing (second transmission timing), the data in the standby buffer is read from the active buffer after data is read from the active buffer. If the transmission start timing is earlier than the SFN value, the data in the standby buffer is moved to the active buffer, and then the data is read from the active buffer.

  According to the present invention, the timing for validating new notification information is controlled, and only necessary data is updated. Furthermore, the updated notification information is reliably transmitted to the mobile device.

  Next, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 shows the relationship between a higher-level station of a W-CDMA radio base station apparatus and a mobile device in broadcast information transmission. The broadcast information is transmitted to the mobile device in response to an update request from the upper station.

  FIG. 2 shows the relationship between the configuration of the broadcast information and SFN. In the transmission data of the broadcast information, the SFN timing to be transmitted is designated, and the transmission data is continuously transmitted at the designated SFN timing.

  FIG. 3 is a sequence flow showing the operation of the W-CDMA radio base station when a broadcast information update request is received from the upper station. When the broadcast information update request is received, the received transmission data is temporarily stored in the standby buffer. In addition, a 10 ms interval timer, which is an SFN interval, is started to trigger transmission data transmission processing at each SFN timing.

  FIG. 4 shows a buffer for storing transmission data. The transmission buffer has two surfaces, a working buffer for storing transmission data currently being transmitted and a standby buffer for temporarily storing the broadcast information update request. In the present embodiment, the active and standby buffers may be referred to as the active and standby buffers, respectively. Further, as shown in FIG. 5, the transmission data stored in the standby buffer is stored together with the transmission data at the transmission start timing, and when the transmission start timing is reached, the transmission data is moved to the active buffer and transmitted. I do. Thereafter, transmission is continued as data in the active buffer. When moving data to the working buffer, the data in the working buffer is overwritten.

  FIG. 6 shows an operation at the time of timeout of the interval timer in which a timeout is notified at each SFN timing.

<Description of operation>
First, the system operation | movement in alerting | reporting information update is demonstrated using FIG. 1 and FIG. The broadcast information is updated by an instruction from the upper station 1 or a measurement result of the radio communication state in the W-CDMA radio base station apparatus 2. When the instruction is issued from the higher station 1, the broadcast information update request is notified to the W-CDMA radio base station apparatus 2 connected to the higher station 1. The W-CDMA radio base station apparatus 2 that has been notified of the broadcast information update request transmits the broadcast information updated in the cell 4 that is its own area. All the mobile devices 3a, 3b, 3c,... Always receive the broadcast information, and the content immediately updated by transmitting the broadcast information updated by the W-CDMA radio base station apparatus 2 The operation by is started.

  In addition, data to be transmitted is designated for each transmission SFN as the notification information, and the notification information updated in the SFN cycle is continuously transmitted. As shown in FIG. 2, SFN is a value in the range of 0 to 4095, and is updated at a cycle of 10 ms. Even when the broadcast information is updated based on the measurement result of the wireless communication state in the W-CDMA radio base station apparatus, only the update trigger is different, and the subsequent operation is the same.

  Next, the operation when the W-CDMA radio base station apparatus receives a broadcast information update request will be described with reference to FIG. The W-CDMA radio base station apparatus that has received the broadcast information update request stores the received broadcast information as transmission data in a transmission buffer provided for each SFN timing (step 301). As shown in FIG. 4, the transmission buffer is an active buffer that stores currently transmitted data, and transmission data that has received a broadcast information update request from the host but has not reached the transmission start timing. And a standby buffer for storing. Both buffers have 4096 divided buffers for storing transmission data for each SFN. When the broadcast information update request is received, the data is stored in the standby buffer. After the storage, an interval timer is set to be started at every 10 ms SFN update timing (step 302). This interval timer gives a time-out notification every 10 ms. For this reason, the W-CDMA radio base station apparatus performs broadcast information transmission processing at each SFN timing in response to the timeout notification.

  Here, each transmission data of the broadcast information will be described. Each transmission data has a transmission start timing as shown in FIG. 5, and transmission is started from the point of time when the designated SFN is reached. For example, when transmission data of “transmission SFN = 2000 and transmission start timing = 500” is received in the broadcast information update request at the time of SFN = 1000, transmission is not started at the next transmission SFN = 2000 timing. It is necessary to perform transmission at the timing of the next transmission SFN = 2000 after the start timing = 500 has passed once. The transmission SFN indicates a timing at which data is actually transmitted, and the transmission start timing is a timing at which preparation for transmission is started.

  In the present invention, in the above case, by having two transmission data storage buffers, it is possible to perform transmission operation in consideration of update of broadcast information and transmission start timing. The transmission data storage buffer may use two physically independent storage devices.

  As described above, when the broadcast information update request is received, it is temporarily stored in the standby buffer, and the interval timer is started (see FIG. 3). The operation after the time-out notification of the interval timer will be described with reference to FIG.

  When the timeout notification is received, the SFN at the time of timeout is confirmed (step 601). If transmission data is not confirmed in the confirmed SFN standby buffer (step 602 / NO), the transmission data in the working buffer is transmitted (step 603). If transmission data is stored in the standby buffer (step 602 / YES), the transmission start timing specified for each transmission data is compared with the read SFN value, and if the transmission start timing is later ( After the transmission data held in the working buffer is transmitted (step 605), the transmission data in the standby buffer is moved to the working buffer (step 606). If applied in the above example, the read SFN is SFN = 1000.

  If the transmission start timing is earlier (step 604 / YES), the transmission data in the standby buffer is moved to the working buffer (step 607), and then the transmission data in the working buffer is transmitted (step 608). . With this operation, it is possible to update the notification information in consideration of the transmission start timing.

  The above algorithm may be stored as a program in a memory such as a ROM, and the processing of the radio base station apparatus may be controlled accordingly.

  As described above, the present invention can update the broadcast information after the specified transmission start timing regardless of the timing at which the broadcast information update request is received or the transmission SFN. It has the characteristic that the broadcast information updated reliably can be transmitted.

It is the schematic of the system to which this invention is applied. It is a block diagram of alerting | reporting information and SFN. It is a sequence flow at the time of broadcast information update request reception. It is a block diagram of a transmission buffer. It is a block diagram of transmission data. It is a sequence flow at the time of interval timer timeout.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Upper station 2 W-CDMA radio base station apparatus 3a Mobile station 4 Cell

Claims (9)

  In the transmission process of broadcast information transmitted from the radio base station apparatus to the mobile station, only the necessary data is updated while taking the transmission start timing into consideration when updating broadcast information transmission data in the radio base station. The transmission data update method. The wireless base station device
A first storage area for holding data to be transmitted;
A second storage area for temporarily holding updated data;
In updating the broadcast information transmission data,
A first transmission timing for determining a timing for reading data from the first storage area; a second transmission timing for determining a timing for moving the data held in the second storage area to the first storage area; The transmission data update method according to claim 1, wherein a timing at which the updated data is validated is controlled based on the data. When the first transmission timing is earlier than the second transmission timing, after data is read from the first storage area, the data in the second storage area is stored in the first storage area. Move
If the second transmission timing is before the first transmission timing, the data from the first storage area is moved to the first storage area, and then the data is transferred from the first storage area. The transmission data update method according to claim 2, wherein: A first storage area for holding data to be transmitted;
A data transmission device having a second storage area for temporarily holding updated data;
A first transmission timing for determining a timing for reading data from the first storage area; a second transmission timing for determining a timing for moving the data held in the second storage area to the first storage area; A transmission data update program for controlling the timing at which the updated data is validated based on the above. When the first transmission timing is earlier than the second transmission timing, after data is read from the first storage area, the data in the second storage area is stored in the first storage area. Move
If the second transmission timing is before the first transmission timing, the data from the first storage area is moved to the first storage area, and then the data is transferred from the first storage area. The transmission data update program according to claim 4, wherein: A first storage area for holding data to be transmitted;
A second storage area for temporarily holding updated data;
A first transmission timing for determining a timing for reading data from the first storage area; a second transmission timing for determining a timing for moving the data held in the second storage area to the first storage area; And a timing for validating the updated data based on the data transmission device. When the first transmission timing is earlier than the second transmission timing, after data is read from the first storage area, the data in the second storage area is stored in the first storage area. Move
If the second transmission timing is before the first transmission timing, the data from the first storage area is moved to the first storage area, and then the data is transferred from the first storage area. The data transmission device according to claim 6, wherein the data transmission device is read out. A system having a mobile terminal and a base station,
The base station
A first storage area for holding data to be transmitted to the mobile terminal;
A second storage area for temporarily holding updated data;
A first transmission timing for determining a timing for reading data from the first storage area; a second transmission timing for determining a timing for moving the data held in the second storage area to the first storage area; And a timing for validating the updated data based on the data transmission system. When the first transmission timing is earlier than the second transmission timing, after data is read from the first storage area, the data in the second storage area is stored in the first storage area. Move
If the second transmission timing is before the first transmission timing, the data from the first storage area is moved to the first storage area, and then the data is transferred from the first storage area. The data transmission system according to claim 8, wherein the data transmission system is read out.

Images