KR100344874B1 - Method for Broadcasting service - Google Patents

Abstract

TECHNICAL FIELD The present invention relates to broadcast services, and more particularly, to a broadcast service method, which is adapted to provide a common broadcast service through a same call channel to a plurality of users located in a cell in a mobile communication system. The broadcast service method according to the present invention comprises the steps of: a base station configuring a service code for each broadcast service; providing service information designated for each service code to a plurality of mobile stations in the same cell; and a first of the mobile stations. Requesting, by the mobile station, a desired specific broadcast service from among the provided service information, and determining whether the specific service request of the first mobile station is a first request of the corresponding service, and when the first time, determines the requested broadcast service. Allocating a new forward call channel for providing, storing resource information for the allocated call channel, and providing the at least one second mobile station additionally requesting the specific service with the stored resource information according to the stored resource information. Allocating forward call channels in common So as to provide a broadcast service using a same communication channel to a plurality of users it does not require the additional communication channel has the effect that the channel resources.

Description

Broadcast service method {Method for Broadcasting service}

TECHNICAL FIELD The present invention relates to broadcast services, and more particularly, to a broadcast service method, which is adapted to provide a common broadcast service through a same call channel to a plurality of users located in an arbitrary cell in a mobile communication system.

In a code division multiple access (CDMA) mobile communication system that is generally based on the EIA / TIA IS-95A or ANSI J-STD-008 standards, a base station uses 8 kbps per call for voice calls or data communications requested by users. Alternatively, one radio communication channel (TC) having a data rate of 13 kbps is allocated to provide a voice or data communication service.

However, in the IS-95B standard, it is possible not only to provide these services by default, but also to additionally allocate one or more radio channels to provide data services at a transmission rate of up to 64 kbps.

In this case, the basic radio channel allocated to the FCH is called a Fundamental Channel (FCH), and when the amount of data to be transmitted increases, a channel additionally allocated to support the transmission rate is required as an additional channel (SCH). It is called). Therefore, in case of a voice call, one basic call channel is set, and in the case of a data call, one or more suitable additional channels are set in addition to the basic call channel according to the transmission speed of the corresponding call.

Here, in the conventional CDMA mobile communication system, a plurality of users located in the same cell area must set up corresponding call channels according to the property of a call to be set up when receiving a voice call or data communication. When listening to a broadcast, a TV broadcast, or the same moving picture data broadcast, each wireless call channel is set.

However, in view of such a conventional call channel, a method in which a plurality of users located in the same cell region commonly use one call channel in a broadcast form has not been proposed.

Therefore, each user allocates different call channels to receive the same broadcast to perform voice or data communication, thereby causing the following problems.

First, unnecessary channel resources are wasted because multiple wireless communication channels are repeatedly allocated for the same broadcast listening or reception.

Second, since the same call processing is required for each user's connection, the call delay of the call channel is delayed.

Accordingly, an object of the present invention has been made in view of the above-described problems of the prior art, and provides a broadcast service method for performing a common broadcast service by allocating the same call channel to a plurality of users located in the same cell region. It is to.

According to an aspect of the present invention for achieving the above object, the base station configures a service code for each broadcast service, providing the service information specified for each service code to a plurality of mobile stations in the same cell; Requesting, by the first mobile station of the mobile stations, a desired specific broadcast service from the provided service information, and determining whether the specific service request of the first mobile station is the first request of the corresponding service; Allocating a new forward call channel for providing the requested corresponding broadcast service, storing resource information for the allocated call channel, and storing the stored information to at least one or more second mobile stations that additionally request the specific service. Commonly allocating the forward call channel according to the resource information Preferably, sending a channel assignment message with information about the assigned forward call channel to the first mobile station, truncating a reverse call channel of the first mobile station, and the first mobile station. And connecting a forward call channel with the base station according to the transmitted channel assignment message. Here, in the step of transmitting the channel assignment message, the channel assignment message includes a specific parameter indicating that the assigned forward call channel can be shared in a broadcast manner. Preferably, the base station is configured to transmit the common forward call channel. Maintains the power to the highest level and does not perform handoff processing of mobile stations that have established the common forward call channel.

Advantageously, transmitting a channel assignment message with information about the assigned forward call channel to the second mobile station, truncating a reverse call channel of the second mobile station, and transmitting the second mobile station to the second mobile station. And connecting a forward call channel with the base station according to the assigned channel assignment message. Here, in the step of transmitting the channel assignment message, the channel assignment message includes a specific parameter indicating that the assigned forward call channel can be shared in broadcast.

1 is a block diagram of a communication system to which a common call channel according to the present invention is applied;

2 is a flowchart illustrating a call setup procedure of a common call channel according to the present invention;

Hereinafter, a configuration and an operation according to an exemplary embodiment of the present invention will be described with reference to the accompanying drawings.

The present invention proposes a broadcast service method for performing a common broadcast service by allocating the same forward call channel to a plurality of users located in the same cell.

To this end, the present invention performs signaling according to the control procedure of layer 3 between each user who wants to listen to the common broadcast and the base station to allocate the same forward call channel.

In order to operate such a common call channel, the present invention sets the following system operating conditions.

First, the operation of the reverse call channel of each user receiving a broadcast through the common call channel is stopped. This is because, if the users who set up the common call channel transmit data through the reverse call channel, the interference on the general call increases.

Secondly, the base station maintains the highest forward power for all users in the cell that wish to receive broadcasts over the common call channel. This is to maintain optimal forward conditions because each user is located in a different area.

Third, the base station stops the handoff process for all users who want to receive the broadcast through the common call channel. This is because a handoff for each individual is not meaningful in the case of a broadcast type common channel used by a large number of users.

Fourth, each service code for each common broadcast service for a common call channel to be used as a broadcast type is designated. This method translates the called number transmitted from each mobile station in the system (i.e., the switching station to the base station controller) by designating the called number for each common broadcasting service when setting up the call of the common calling channel in the same way as the conventional additional service. This is to allocate a common call channel according to the corresponding common broadcast service.

1 is a block diagram of a communication system to which a common call channel according to the present invention is applied.

Referring to FIG. 1, a communication system according to the present invention provides wireless communication between a plurality of mobile stations (MS) 100a-100n and mobile stations 100a-100n that require allocation of a common call channel for a common broadcast service. A plurality of base stations located between a plurality of base stations (BTSs) 101a-101n for accessing and allocating common call channels required by the mobile stations 100a-100n, and between the exchange 103 and the base stations 101a-101n. A base station controller (BSC) 102 that controls 101a to 101n and a switching station for notifying the base stations 101a to 101n that a common broadcast service is required by translating the service codes transmitted by the mobile stations 100a to 100n ( MSC) 103, Home Location Register (HLR) 104 for managing subscriber information by storing and processing location information for paging of mobile stations 100a-100n, and Short Message Service Center (SMSC) 105 It consists of.

In the communication system configured as described above, the software of the mobile stations 100a to 100n, the base stations 101a to 101n, the base station controller 102, and the switching center 103 is changed to allocate the common call channel according to the present invention.

This is because the common call channel according to the present invention is allocated through the call setup procedure between the mobile stations 100a-100n, the base stations 101a-101n and the base station controller 102 and the number translation function of the switching center 103 for call processing. Because.

2 is a flowchart illustrating a call setup procedure of a common call channel according to the present invention.

Referring to Figure 2, the call setup procedure of the common call channel according to the present invention is divided into two.

The first is the call setup procedure for the common call channel for the first user who has requested the assignment of the common call channel for the first time, and the second is the same common call channel since the first user has already been assigned the common call channel Call setup procedure for a common call channel for other users. For convenience of description, the first user is defined as a first user, and other users who attempt to access after the first user are defined as a second user.

First, the call connection procedure of the common call channel to the first user who has requested the allocation of the common call channel for the first time is as follows.

First, the base station configures a service code for a common broadcast service, and sets up a paging channel using a short message service (SMS) function for service information on a common broadcast service that can be provided. Provided to all users in the cell through (S200).

At this time, the service information provided by the base station to all users in the cell is a service type and type, a providing time, and a service code for a common broadcast service. These service information are provided to each user as a data burst message or broadcast message. Is sent. Then, all users in the cell receive the data burst message transmitted from the base station to recognize that the common broadcast service is provided.

Subsequently, a first user who attempts to access a call for the first time among users who recognizes that a common broadcast service is provided transmits a 'Mobile Origination Message' to a base station at a time desired by the user. The allocation of the channel is requested (S201). In this case, the first user selects a desired common broadcast service among common broadcast services according to service information provided by the base station, dials a service code corresponding to the selected common broadcast service, and attempts to access a call to the base station.

In more detail, the first user dials a number corresponding to a desired service among a predetermined number of common broadcast services provided by the base station as a data burst message in step S200, in the form of '* number #'. ) To transmit an 'outgoing call setup message' to the base station. This is the same as the conventional method of requesting an additional service in consideration of the user interface.

Then, when the base station receives an 'outgoing call setup message' from the first user, the base station transmits null traffic through the forward traffic channel (S202), and the switching center transmits the called number transmitted by the first user. (Ie, a service code) is translated to recognize that the corresponding service option is a service option for the common broadcast service and that a specific common broadcast service is first required by the first user.

Then, the switching center transmits the information on the common broadcast service requested by the first user and the information indicating the first call connection to the base station, and the base station sets the resources of the forward call channel for performing the common broadcast service. Afterwards, the resource information of the established forward call channel is transmitted to the corresponding first user who has requested the call through the paging channel as a 'channel allocation information notification message' (S203).

In this case, the 'channel allocation information notification message' transmitted from the base station to the first user includes a frequency, frame offset, Walsh code for the basic channel and additional channels for the set forward call channel, and the like. The notification message uses a channel assignment message (CAM), an extended channel assignment message (ECAM), and a supplemental channel assignment message (SCAM).

In addition, the base station additionally transmits a specific parameter for informing that the corresponding forward call channel is commonly provided to all users who want to broadcast the channel allocation information notification message. At this time, the specific parameter uses a parameter set to 'BROAD_TC = 1'. The switching center stores the channel resource information for the forward call channel set up in case the other users request the common broadcast service requested by the first user other than the first user.

Subsequently, the first user who receives the information on the established forward call channel through the 'channel allocation information notification message' transmitted from the base station uses the forward common type by using null traffic information transmitted through the set forward call channel. Know the call channel.

Unlike in the case of a general voice call, the first user does not transmit a preamble used for the reverse synchronization by cutting the reverse communication channel (S205). This is because when the first user transmits data through the reverse call channel, interference to other users who are connecting to the general voice call is increased.

Subsequently, the first user and the base station omit the backward tuning procedure, and after a predetermined time passes by their timers, transfers the call setup state for the forward call channel for the common broadcast service to the call connection state, and connects forward. The broadcast service is started through the call channel (S206).

Here, in the call processing procedure, the transmission procedure of the base station response command and the mobile station response command and the negotiation procedure of the service option 'service_option_connection and service_option_complete' may be omitted as optional items. (S204).

The call setup procedure for the second user will now be described when the second user requests the same common broadcast service as the first user in a situation where a specific common broadcast service is already provided to the first user. Here, the second user is applied to all users after the first user.

First, among the users who have received the broadcast message in step S200 and recognize that the common broadcast service is provided, the second user who wants to receive the same common broadcast service as the first user is sent to the base station at the desired time. The outgoing call setup message is transmitted to request allocation of a common call channel (S207). In this case, like the first user, the second user selects a service code for a desired common broadcast service from among service information for the common broadcast service provided by the base station, and transmits a called number consisting of the selected service code to the base station. Try to call.

In more detail, the second user dials a service code corresponding to a desired service among the common broadcast services provided by the base station as a data burst message in step S200 and dials the service code in the form of '* number #' to the base station. Send a call setup message.

The exchange then translates the called number (i.e. service code) sent by the second user so that the corresponding service option requested by the second user corresponds to a common broadcast service already assigned to the first user and the second user first Recognize that you are not a claimant.

Then, the exchange transmits the resource information of the forward call channel stored when the common call channel is allocated to the first user to the base station, and the base station uses the resource information of the forward call channel transmitted from the exchange as a channel allocation information notification message. The transmission is transmitted to the second user through the paging channel (S208).

At this time, the channel allocation information notification message transmitted by the base station includes a frequency, frame offset, Walsh code for the base channel and additional channels already assigned to the first user, and the channel allocation information notification. The message uses a channel assignment message (CAM), an extended channel assignment message (ECAM), and a supplemental channel assignment message (SCAM).

In addition, the base station additionally transmits a specific parameter for notifying that the corresponding forward call channel is commonly provided to all users who want to broadcast the channel allocation information notification message. In this case, the specific parameter is a parameter set to 'BROAD_TC = 1' like the first user.

Subsequently, the second user who has received the resource information on the forward call channel that is already assigned to the first user through the channel assignment information notification message from the base station uses the null traffic information transmitted through the already assigned forward call channel to forward common. Recognizes the type call channel.

Unlike the case of a normal voice call, the second user does not transmit a preamble used for the reverse tuning by cutting the reverse communication channel (S210).

Subsequently, the mobile station and the base station skip the backward tuning procedure and, after a predetermined time passes by their own timers, transfer the call state of the established common call channel to the connect state, and broadcast service through the connected common call channel. Start (S211).

Here, as in the case of the first user, 'service_option_connection and service_option_complete', which is a transmission procedure of 'base station response command and mobile station response command' and a negotiation procedure of service option, It can be omitted as an option.

The switching center also accumulates and stores the number of users accessing the common type of communication channel.

On the other hand, when performing the common broadcast service according to the present invention, the system (that is, the switching center and the base station controller) uses the maximum forward power for all users in the cell in order to provide a stable common broadcast service in the cell. There is no individual hand-off for the user.

In addition, the common call channel assigned according to the present invention is maintained regardless of the release of each user within the time provided by the system. Therefore, each user who wants to terminate the service releases itself without having to perform any release procedure with the system.

The broadcast service method according to the present invention can be equally applicable to digital cellular networks (DCNs), personal communication systems (PCSs), and synchronous IMT-2000 systems in addition to CDMA mobile communication systems.

As described above, the broadcast service method according to the present invention is a base station according to a control procedure of layer 3 without specifying a separate common call channel in a physical layer in a DCN / PCS CDMA mobile communication system and a synchronous IMT-2000 system. Signaling between the user and the user side can provide a common broadcast service corresponding to a desired delivery service to a plurality of users located in the same cell.

First, according to the broadcast service method according to the present invention, since it is possible to provide a common broadcast service to a plurality of users using the same forward call channel, an additional call channel is not required for each user, thereby saving channel resources. have.

Second, the broadcast service method according to the present invention can be implemented only by the call processing procedure corresponding to the layer 3, so that it is easy to implement.

Third, according to the broadcast service method according to the present invention, since each service code is configured to match a common broadcast service to a delivery service provided by a voice service and a data service, call setup is performed accordingly. There is an effect that can be applied and applied.

Claims (7)

Configuring a service code for each broadcast service by the base station; Providing service information designated for each service code to a plurality of mobile stations in the same cell; Requesting, by a first mobile station of the mobile stations, a desired specific broadcast service of the provided service information; The base station determines whether the specific service request of the first mobile station is the first request of the corresponding service, and if it is the first time, allocates a new forward call channel for providing the requested corresponding broadcast service, and assigns to the assigned call channel. Storing resource information about the resource; And allocating the forward call channel according to the stored resource information to at least one or more second mobile stations additionally requesting the specific service. 2. The method of claim 1, further comprising: sending a channel assignment message with information about the assigned forward call channel to the first mobile station; Truncating a reverse call channel of the first mobile station; And connecting, by the first mobile station, a forward call channel with the base station in accordance with the transmitted channel assignment message. The method of claim 2, wherein in the step of transmitting the channel assignment message, The channel assignment message includes a specific parameter indicating that the assigned forward call channel can be shared in broadcast. 2. The method of claim 1, wherein the base station maintains maximum power for the common forward call channel. The broadcast service method as claimed in claim 1, wherein the base station does not perform handoff processing for mobile stations that have established the common forward call channel. 2. The method of claim 1, further comprising: sending a channel assignment message with information about the assigned forward call channel to the second mobile station; Truncating a reverse call channel of the second mobile station; And connecting, by the second mobile station, a forward call channel with the base station according to the transmitted channel assignment message. The method of claim 6, wherein in the step of transmitting the channel assignment message, The channel assignment message includes a specific parameter indicating that the assigned forward call channel can be shared in broadcast.