JPH10276128A - Information data distribution method and information data communication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To distribute information data of a comparatively small data quantity and requiring immediacy such as a flash news efficiently in a PHS network. SOLUTION: Information data from a center 101 are stored in a cache of a base station 201 that relays a PHS slave set 11 and the center 101, and in the case that information data designated by an information data transfer request from each PHS slave set 11 in an area of the base station 201 are in existence in the base station 201, no communication is made with the center 101 but the base station 201 distributes the information data to the PHS slave set 11 immediately. Thus, in comparison with a conventional operation mode that communication with the center 101 is made every time the information data transfer request is issued from the PHS slave set 11, the effect of congestion in a speech transaction is relaxed and the system copes with requests from pluralities of slave sets 11 at the same time efficiently.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an information data distribution method and an information data communication system, and more particularly to an information data distribution method and an information data communication system for distributing information data using a PHS network system.

[0002]

2. Description of the Related Art In recent years, with the spread of a simplified portable telephone system called a PHS, a distribution service of information data using the PHS network system has been receiving attention. To realize this information data distribution service, communication between a center having information data and a PHS slave is usually used.

In this case, when distributing information data to a slave unit in a PHS network, the base station obtains information data from the center through an ISDN B channel connecting the center having the information and the base station. The basic operation is to distribute it wirelessly to slave units.

[0004] As described above, when a base station that relays between a PHS slave and a center acquires information data from the center through an ISDN network, the B channel is generally used.

[0005] However, in the case of distributing flash news or the like having a relatively small data size, such as weather forecasts and road information, there is a problem in that communication costs are relatively high. In addition, the number of slave units that can be simultaneously delivered is limited by the number of ISDN B channels held by the base station that relays the slave unit and the center, which causes a problem that the immediacy of information data delivery is impaired.

[0006]

As described above, the PHS
In the case of providing information data distribution service in a network system, conventionally, an information link between a center and a base station is always used regardless of the data size of information data to be distributed.
The base station acquires information data from the center through the SDN B channel. Therefore, if the data size of the information data to be distributed is relatively small, the communication cost becomes high and the communication resources such as the number of lines are limited, and during a call transaction congestion, etc. There is a problem that it becomes difficult to cope with a request from the PHS slave.

[0007] The present invention has been made in view of the above points, and is capable of simultaneously coping with requests from a plurality of slaves without being congested in a call transaction, and is affected by the limitation of call resources. It is an object of the present invention to provide an information data distribution method and an information data communication system capable of instantly distributing information data without the need.

[0008]

SUMMARY OF THE INVENTION The present invention relates to a radio terminal, a center storing information data to be provided to the radio terminal, and a center connected to the center via a digital network, for relaying between the radio terminal and the center. An information data distribution method used in an information data communication system including a base station, wherein information data obtained from the center via the digital network is temporarily stored in a storage device of the base station, In response to the information data transfer request issued to the center, search the storage device of the base station, when the information data specified in the information data transfer request exists in the storage device of the base station, The present invention is characterized in that corresponding information data is taken out from a storage device of the base station and distributed to the wireless terminal wirelessly.

In this information data distribution method, PH
When the information data from the center is cached in the base station that relays the center between the wireless terminal such as the S slave and the center, and the information data specified in the information data transfer request from the wireless terminal exists in the base station. Does not perform communication with the center, and immediately distributes information data from the base station to the wireless terminal. Therefore, compared to the conventional operation mode in which communication with the center is performed every time an information data transfer request is issued from a wireless terminal, the influence of congestion of call transactions is reduced, and at the same time, requests from a plurality of slave units are efficiently handled. Be able to cope well. Further, since the communication between the base station and the center only needs to be performed when the requested information data is not held in the base station, the information data can be immediately delivered at a low communication cost. .

When the base station acquires information data of a relatively small data size such as flash news from the center via the ISDN, communication using the D channel instead of the B channel of the ISDN is used. Is preferred. The ISDN D channel is normally used for outgoing / incoming call processing, center notification of traffic information and location registration information, but can be used for information transfer when not used. Therefore, when the data size of the information data to be distributed is small, the information data can be efficiently obtained from the center by utilizing the D channel.

It is preferable that the transfer of information data from the center to the base station is performed not only at the time of a cache miss but also periodically in accordance with the update time of the information data stored in the center. By obtaining the information data to be distributed to the wireless terminal from the center in advance to the base station in this way, more immediate information distribution is possible.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an information data communication system according to an embodiment of the present invention. This information data communication system provides a distribution service of information data such as weather forecast and road information by using a PHS network. The PHS slave unit 11, the center 201, the base station 201, and the center 201 and the base station 201 are connected to each other. It comprises an ISDN network 5 for connection.

The center 201 is a server for accumulating and managing information data to be distributed to the PHS slave unit 11, and includes an auxiliary storage device 1, a terminal adapter 2, a storage device 3, and a CPU 4.

The auxiliary storage device 1 stores information data to be distributed in a database. The information data stored in the auxiliary storage device 1 is, for example, a flash news such as a weather forecast and road information, and the content is updated periodically.

The storage device 3 stores a processing program for performing data management of the auxiliary storage device 1 and communication control via the terminal adapter 2. When the CPU 4 executes this processing program, information data management and communication with the base station 201 are performed.

The base station 201 responds to a call request from the PHS slave device 11 existing in the area or a call request to the PHS slave device 11 from a public network exchange or the like.
A device for relaying between the HS slave 11 and the center 101 or between the PHS slave 11 and the exchange, as shown in the figure,
It comprises a terminal adapter 6, an auxiliary storage device 7, a PHS wireless device 8, a storage device 9, and a CPU 10.

The auxiliary storage device 7 is a device for temporarily storing information data extracted from the center 101, and is used as a cache of a database held by the center 101. The PHS wireless device 8 performs an operation based on the RCR standard 28 for communicating with the PHS slave 11.
I and the like. Storage device 9
Stores a processing program for performing data management of the auxiliary storage device 7, communication control via the terminal adapter 6, and communication processing control with the PHS slave 11 via the PHS wireless device 8. This processing program is called CP
As the U10 executes, management of cached information data and communication with the center 101 and the PHS slave 11 are performed.

Next, the procedure of the entire information data distribution process in the system of FIG. 1 will be described with reference to the protocol sequence of FIG. <Procedure 1> First, when confirming a sufficient electric field strength from the base station 201, the PHS slave 11 wirelessly sends an information data delivery request to the base station 201 to request the center 101 to deliver information data. Issue a call request containing When a call request is issued, generally, the Q.4 established by the TTC to execute the call request is performed. A call setup packet (SETUP) defined in 931b is transmitted to base station 201.

At this time, as shown in FIG. 3, the PHS network control in the facility field following the protocol identifier field, call number field, message type field, and transmission capability field of the call setup packet (SETUP). Following the management information, the PHS slave unit embeds a command indicating an information data request from the center, or defines a special number indicating an information data request from the center 101 in the call number, thereby making the base station 20
At 1, the user is prompted to pull out information data from the center 101.

<Procedure 2> PH through the PHS radio device 8
The CPU 10 of the base station 201, which has received the notification that the packet has been received from the S slave 11, analyzes the received packet and sends an information data request from the center 101 to the facility 101.
If the PHS recognizes that the packet is a call setup packet including a call number included in the field or a meaning thereof,
In order to respond to the call setting packet from the slave unit 11, Q. 93
1b-compliant call setting reception packet (CALL PRO
C) and instructs the PHS wireless device 8 to transmit the response packet (CONNECT) to the PHS slave 11, and executes the same.

Note that PH in the facility field
If a command indicating an information data request from the S cordless handset 11 to the center 101 cannot be found, the following <procedure 3>
> A normal call processing procedure is performed without performing the subsequent procedures.

<Procedure 3> The CPU 10 sets a SETU including a command to request information data from the center 101.
If the packet is recognized as a P packet, the auxiliary storage device 7 is searched to confirm whether or not the information data specified by the information data extraction request command exists in the auxiliary storage device 7.

<Procedure 4> The CPU 10 immediately proceeds to <Procedure 8> if the data obtained by the search is valid for the request from the PHS slave 11. Also, P
If there is no information data in the auxiliary storage device 7 that is valid in response to the request from the HS slave device 11, or if there is no information data in the auxiliary storage device 7, the information is sent to the center 101 through the terminal adapter 6 and the ISDN network 5. A request is made to provide information data.

When instructing the center 101 to provide information data, a UUI message
The packet is used, and the center 10 is used in the packet.
1 is embedded with an information data provision request command.

<Procedure 5> When the CPU 4 of the center 101 receives the notification that the packet has been received via the terminal adapter 5, it analyzes the received packet and recognizes the information data provision request command. The information data requested by the device 1 is extracted.

<Procedure 6> CPU from which information data was extracted
4 transmits information data to the base station 201 via the ISDN 5. In transmitting the information data, a D-channel UUI message packet is used as in <Procedure 4>.

<Procedure 7> The CP of the base station 201 which has been notified that the packet has been received through the terminal adapter 6
If U10 analyzes the received packet and confirms that it is the requested information data, it stores it in the auxiliary storage device 7.

<Procedure 8> The CPU 10
In order to send information data to A facility packet (FACIL) as shown in FIG.
Information data is embedded in the PHS slave device 11 via the PHS wireless device 8. As a result, the information data is displayed on the PHS slave 11, for example, on the liquid crystal screen of the PHS slave 11.

<Procedure 9> In order to disconnect the wireless communication path, the PHS slave 11 931b-compliant disconnection packet (D
ISC0NECT) to the base station 201.

<Procedure 10> Having received the notification from the PHS slave 11 that the packet has been received, the CPU 10 analyzes the received packet and recognizes that it is a disconnected packet. 931b-based release packet (RELEA
SE) via the PHS wireless device 8 to the PHS slave 11.

<Procedure 11> The PHS slave device 11 transmits a Q.101 message to notify the base station 201 that the wireless communication channel is released. 931
b complete release packet (RELEASE CO.
MPLETE) to the base station 201.

<Procedure 12> When the CPU 10 receiving the notification of receiving the packet from the PHS slave 11 analyzes the received packet and recognizes that it is a release completion packet, the CPU 10 waits for a call setting request. Return to

Note that the CPU 10 of the base station 201 can simultaneously process transactions from a plurality of slave units 11 by simultaneously performing a plurality of series of operations from <Step 2> to <Step 12>. it can.

Next, referring to the flowchart of FIG.
The operation of the base station 201 will be described. When the CPU 10 of the base station 201 receives the call setting request while waiting for the call setting request from the slave device 101, first, it determines whether or not the call setting request includes an information data distribution request (step S101). , S102). If it is a normal call setting request that does not include the information data distribution request, a normal call processing procedure is executed according to the call setting request (step S10).
3).

If the request is a call setting request including an information data distribution request, the auxiliary storage device 7 is searched to determine whether or not the information data specified by the information data distribution request is cached in the base station 201 (step). S10
4). If it is cached, the center 101
The communication is not performed, and the information data is immediately delivered to the PHS slave device 101 in a facility packet (step S108).

On the other hand, if the data is not cached,
The CPU 10 of the base station 201 communicates with the center 101 via the D channel by the user signal bearer service using the UUI message, and acquires the information data requested by the PHS slave device 101 from the center 101 (step S105, S106). The information data obtained from the center 101 is stored in the auxiliary storage device 7 of the base station 201, and then stored in a facility packet in the PHS slave device 101.
(Steps S107 and S108).

When the wireless communication path with the PHS slave device 101 is disconnected, the process returns to the waiting state of step S101. As described above, in this embodiment, PH
The information data from the center 101 is cached in the base station 201 that relays the S slave 11 and the center 101, and is specified by the information data transfer request from each PHS slave 11 in the area of the base station 201. When the information data exists in the base station 201, the communication with the center 101 is not performed, and the information data is immediately distributed from the base station 201 to the PHS slave 11. Therefore, the PHS handset 11
Each time an information data transfer request is issued from
As compared with the conventional operation mode of performing communication with a telephone, the influence of congestion of a call transaction is reduced, and requests from a plurality of slave units 11 can be efficiently handled at the same time.

Since communication between the base station 201 and the center 101 may be performed only when the requested information data is not held in the base station 201, the information data can be transmitted at a low communication cost. Immediate distribution becomes possible.

When the base station 201 obtains information data of a relatively small data size such as flash news from the center 101 via the ISDN network 5,
Since the communication using the D channel instead of the B channel of ISDN is used, the center 1 has a low communication cost.
01 can efficiently acquire information data.

The transfer of information data from the center 101 to the base station 201 is performed not only at the time of a cache mishit but also periodically in accordance with the update time of information data such as a weather forecast and other news stored in the center 101. It can be done on a regular basis. By obtaining information data to be distributed from the center 101 to the base station 201 in advance in this way, more immediate information distribution is possible.

In this embodiment, when there is no information data in the base station 201, only the information data requested by the PHS slave unit 11 is obtained from the center 101. Center 1 collectively
01 may be obtained.

The protocol sequence described with reference to FIG. 2 is modified as shown in FIG.
T) may be performed immediately before distribution of information data, that is, after communication with the center 101. Further, base station 201 may be a PHS base unit used at home or the like.

[0043]

As described above, according to the present invention, the distribution of information data requiring a relatively small amount and immediacy, such as flash news, can be performed without being affected by the limitation of communication resources. Moreover, it can be realized while maintaining compatibility with existing communication protocols.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an information data communication system according to an embodiment of the present invention.

FIG. 2 is an exemplary view showing a protocol sequence of information data distribution processing performed in the information data communication system of the embodiment.

FIG. 3 is an exemplary view showing an example of a call setting packet used in the information data communication system of the embodiment.

FIG. 4 is an exemplary view showing an example of a facility packet used in the information data communication system of the embodiment.

FIG. 5 is an exemplary flowchart illustrating the operation procedure of a base station provided in the information data communication system of the embodiment.

FIG. 6 is an exemplary view showing an example of another protocol sequence of information data distribution processing performed in the information data communication system of the embodiment.

[Explanation of symbols]

 1,7 ... Auxiliary storage device 2,6 ... Terminal adapter 3,9 ... Storage device 4,10 ... CPU 5 ... ISDN network 8 ... PHS wireless device 11 ... PHS slave unit

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI H04L 12/58

Claims (7)

[Claims] 1. Information data including a wireless terminal, a center storing information data to be provided to the wireless terminal, and a base station connected to the center via a digital network and relaying between the wireless terminal and the center. An information data distribution method used in a communication system, comprising: temporarily storing information data acquired from the center via the digital network in a storage device of the base station; and issued from the wireless terminal to the center. In response to the information data transfer request, searching the storage device of the base station, when the information data specified in the information data transfer request exists in the storage device of the base station, An information data distribution method, comprising: extracting information data to be transmitted and wirelessly distributing the information data to the wireless terminal. 2. The ISDN between the base station and the center when the information data specified in the information data transfer request does not exist in the storage device of the base station. The information data is transferred from the center to the base station by data communication using a channel, and the information data is stored in a storage device of the base station and distributed to the wireless terminal. Information data distribution method. 3. A data communication is performed between the base station and the center in accordance with an update time of information data stored in the center, so that information data to be delivered to the wireless terminal is transmitted from the center. 2. The information data distribution method according to claim 1, wherein the information data is acquired in advance by the base station. 4. Information data including a wireless terminal, a center storing information data to be provided to the wireless terminal, and a base station connected to the center via an ISDN network and relaying between the wireless terminal and the center. An information data distribution method for distributing news information using a communication system, comprising: temporarily storing news information obtained from the center via the ISDN network in a storage device of the base station; Transmitting a call request including from the wireless terminal to the base station, determining whether the call request includes the information data transfer request by interpreting the call request by the base station, When the call request includes the information data transfer request, the news information requested by the information data transfer request is searched from the storage device of the base station, and the information data is retrieved. When the news information specified in the transfer request exists in the storage device of the base station, the news information corresponding to the news information is taken out from the storage device of the base station and distributed to the wireless terminal wirelessly. When the designated news information does not exist in the storage device of the base station, the news information is acquired from the center to the base station by data communication using the ISDN D channel between the base station and the center. And storing the information in a storage device of the base station and distributing the information to the wireless terminal. 5. Information data including a wireless terminal, a center storing information data to be provided to the wireless terminal, and a base station connected to the center via a digital network and relaying between the wireless terminal and the center. In the communication system, the base station includes a storage unit for temporarily storing information data obtained from the center via the digital network, and a base station in response to an information data transfer request issued from the wireless terminal to the center. Searching the storage unit of the base station, and when the information data specified by the information data transfer request exists in the storage unit of the base station, retrieves the corresponding information data from the storage unit of the base station, and Means for wirelessly distributing information to the information data communication system. 6. The digital network is an ISDN, and the base station, when the information data specified by the information data transfer request does not exist in a storage device of the base station, establishes a connection between the base station and the center. Means for acquiring information data from the center by data communication using the D channel of the ISDN, storing the information data in a storage device of the base station, and distributing the information data to the wireless terminal. 5. The information data communication system according to 5. 7. The information to be distributed to the wireless terminal by performing data communication between the base station and the center in accordance with an update time of the information data stored in the center. 6. The information data communication system according to claim 5, further comprising means for acquiring data from said center in advance and storing said data in said storage means.