KR101102765B1 - Differential Voice Rate Service System and Method for the Same - Google Patents

Abstract

The present invention relates to a WCDMA service, and more particularly, to a voice rate differentiation service system and a method of providing the same, which provide a terminal user with differentiation of a voice rate allocated when a voice service is provided in a mobile communication system such as a WCDMA system.

The present invention relays a terminal and a wireless control unit for transmitting and receiving voice data through wireless communication, and measures a transmission output of a corresponding cell and provides the wireless control unit with a Node B and a transmission output provided in conjunction with the Node B. Compares the threshold with a threshold value, and requests a change in the voice rate to the exchanger, sets the voice rate in response to the change request of the wireless controller, and switches for requesting the voice rate of the terminal from a home location register, A home location register which stores user information, location information and rating information of a voice rate of user setting, interacts with the exchange to perform voice call processing and user authentication, and provides a voice rate set in the terminal to the exchange, the exchange Interworking with the voice of the terminal based on the set voice rate When transmitting and receiving units per household emitter and a charging device via the call information in accordance with each speech rate by a holding time of charge.

The present invention provides a voice service at various speeds to a terminal user by differentiating a voice transmission rate allocated in a mobile communication system such as a WCDMA system, and provides a cost reduction effect by applying differential rates according to the voice services at various speeds. In addition, it is possible to pioneer various types of service market such as increasing voice capacity per base station, absorbing 2nd generation voice service users, and applying user-configured classes with small changes in voice data rates. It is effective in preventing a sudden change in the caller's haptic quality.

WCDMA system, voice rate, billing device, AMR, user set class

Description

Voice Rate Differentiation Service System and its Provision Method {Differential Voice Rate Service System and Method for the Same}

1 is a schematic diagram of a voice rate differentiation service system according to the present invention;

2 is a diagram showing a call processing procedure in a WCDMA system;

3 is a flowchart illustrating a voice rate providing procedure;

4 is a flowchart illustrating a downlink voice rate control process;

5 is a flowchart illustrating an uplink voice rate control process;

6 is a flowchart illustrating a process of charging a service fee according to a voice transmission rate.

<Explanation of symbols for the main parts of the drawings>

10: calling terminal 11: called terminal

20: calling party node B 21: called party node B

30: calling party RNC 31: called party RNC

40: calling party MSC 41: called party MSC

50: HLR 60: charging device

The present invention relates to a WCDMA service, and more particularly, to provide a terminal user by differentiating a voice transmission rate allocated when providing a voice service in a mobile communication system such as a wideband code division multiple access (WCDMA) system. It relates to a voice rate differentiation service system and a method of providing the same.

In general, in a wideband code division multiple access system, AMR (Adaptive Multi-Rate) codec control is performed for resource management according to load of wired / wireless resources. Voice codec adopted as standard in multiple access system.

In other words, the bit transmission error in digital mobile communication is the biggest cause of the degradation of the call quality, and in order to solve this problem, the bit for speech compression and the channel coding bit among the allowed bits are the bit error degree. The AMR codec is used in a method of improving the overall sound quality by variably adjusting accordingly.

Therefore, in the environment with many bit errors, many bits are allocated to channel coding to enable bit correction, and in the environment with little bit errors, many bits are allocated to the voice compressor to improve voice compression performance.

As described above, there are 4.75 Kbps, 5.15 Kbps, 5.90 Kbps, 6.70 Kbps, 7.40 Kbps, 7.95 Kbps, 10.20 Kbps, and 12.20 Kbps in the eight resource rates of the AMR codec.

The wireless controller may change the resource rate in units of 20 ms frame based on the load of the wireless section, the load of the wired section, the channelization code occupancy rate, and the quality of service (QoS).

Such a change in resource rate is possible in a single rate mode and a multi rate mode.

The single rate mode transmits at one of eight rates of AMR codec of 4.75 Kbps, 5.15 Kbps, 5.90 Kbps, 6.70 Kbps, 7.40 Kbps, 7.95 Kbps, 10.20 Kbps, 12.20 Kbps.

Currently, the service is provided only at a voice rate of 12.20 Kbps.

Therefore, even if the terminal user is provided with a voice rate of less than 12.20 Kbps, even if it is irrelevant to receive the service of the voice rate of 12.20 Kbps inevitably, the high cost of providing the service of the voice rate of 12.20 Kbps as described above There is a problem that occurs.

That is, compared to the high quality and high speed service of 12.20 Kbps, there is a problem that is collectively applied to a terminal user who wants to receive a service of appropriate quality and speed of 7.40 Kbps to 7.97 Kbps.

In addition, in the case of the high quality and high speed service of 12.20 Kbps, there may be a limit of user capacity per corresponding base station, and when the user capacity per base station becomes saturated, no further call connection is possible.

Multi-rate mode supports three modes of four 8-rate combinations, such as the rate-combination scheme defined in the 3rd Generation Partnership Project (3GPP) specification (see Table 1). Do.

mode Bitrate combination AM1 12.20 Kbps / 7.95 Kbps / 5.90 Kbps / 4.75 Kbps AM2 10.20 Kbps / 6.70 Kbps / 5.90 Kbps / 4.75 Kbps AM3 7.40 Kbps / 6.70 Kbps / 5.90 Kbps / 4.75 Kbps

However, in the case of voice rate combination method as shown in Table 1 (rate rate combination method in multi-rate mode), if the voice rate changes drastically during the duration of the call, the quality of the voice caller will increase and the perceived quality of the voice caller will be changed drastically. There is a growing problem.

The present invention was devised to solve the above problems of the prior art, and provides a voice service of various speeds to terminal users by differentiating a voice transmission rate allocated in a mobile communication system such as a WCDMA system and having a small variation in the voice transmission rate. It is an object of the present invention to provide a voice transmission rate differentiation service system and a method of providing the same to prevent a sudden change in call quality by applying a user setting class, and to increase a user capacity per base station to a service provider.

In accordance with an aspect of the present invention, there is provided a voice rate differentiation service system, which performs transmission and reception of voice data through wireless communication, relays a terminal and a wireless control unit, and measures transmission power of a corresponding cell. Compares the threshold value with a node B provided to the control unit, the threshold value based on the transmission power provided in conjunction with the node B, sets a voice rate by changing the request of the wireless controller, A switch requesting the voice transmission rate of the terminal from a home location register, the user information of the terminal, the location information and the rating information of the voice transmission rate of the user setting, and interact with the exchange to perform voice call processing and user authentication; A home position for providing a voice rate set to the terminal to the exchange And a billing device that interlocks with the exchanger and charges the call through call information according to the maintenance time for each voice rate per unit call when transmitting and receiving voice data of the terminal based on the set voice rate.

In addition, the method for providing a voice rate differentiation service according to an embodiment of the present invention for achieving the above object, a) to authenticate the home location register through the mobile application protocol in the calling exchange to determine whether the calling terminal is a normal subscriber; Requesting inquiry of user information and voice transmission rate of the calling terminal by transmitting an information request message; b) user information of the calling terminal in response to the authentication information request message of the calling exchange at the home location register; Inquiring a voice rate and providing it to the calling exchange in the form of an authentication information response message; c) ensuring the integrity of mutual authentication and signaling traffic between the terminal and the exchange after authentication and whether to support encryption of user traffic; and Determine the algorithm to use and at the terminal Providing an indication transmission message from the wireless controller to an exchange in response to providing an uplink indication transmission message requesting call establishment to a line controller; d) a call from the exchange to the radio controller in response to the uplink indication transmission message. Providing a downlink indication transmission message indicating that the configuration is in progress and providing an indication transmission message to the terminal, e) providing a RAB configuration request message requesting RAB configuration from the exchange to the wireless controller, Transmitting a voice rate, f) providing a radio bearer setup message from the radio controller to the terminal in a state where the allocation of radio resources is completed to establish a new radio bearer between the radio controller and the Node B, g) Setting completion state of voice rate allocation from the terminal to the wireless controller Shown provide a radio bearer setup complete message, and includes the step of providing a RAB assignment response message to the MSC in the wireless controller.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings and preferred embodiments. For reference, in the following description, detailed descriptions of well-known functions and configurations that may unnecessarily obscure the subject matter of the present invention are omitted.

1 is a schematic diagram of a voice rate differentiation service system according to the present invention. FIG. 1 illustrates a voice rate differentiation system applied to a wideband code division multiple access system. As illustrated, the voice rate differentiation system according to the present invention includes a user equipment (UE) 10, 11 and a node B ( Node B) 20, 21, Radio Network Controller (RNC) 30, 31, Mobile Switching Center (MSC) 40, 41, Home Location Register (HLR) 50) and the charging device (60).

Terminal 10 (11) is composed of a mobile equipment (ME) and a user authentication module (UMTS Subscriber Identity Module (USIM), which is configured to communicate with the Cu interface.

The ME is a wireless terminal used for wireless communication via a Uu interface, and the USIM is a smart card for identifying a user, performing an authentication algorithm, and storing authentication and encryption keys and some user information required by the terminal. .

Node B (20) 21 is configured to convert the data flow between the Iub interface and the Uu interface to relay between the terminal 10 (11) and the radio controller 30, 31, and participate in radio resource management do.

The radio controller 30, 31 owns and controls radio resources, and is configured to serve as a service access point for all services (eg, connection management to terminals) provided to the CN (Core Network), and the Node B 20 communicates with the Iub interface.

The wireless controllers 30 and 31 are configured to interoperate with the Node Bs 20 and 21 to compare with a threshold based on the transmission power provided and to request the switch 40 and 41 to change the voice rate. do.

The main components of the CN are generally the exchange 40, 41, home location register 50, gateway MSC (GMSC), Serving GPRS Support Node (SGSN), and packet gateway switch (Gateway GPRS). Support Node; GGSN).

Switch 40 (41) plays a switching role for voice call setup of the terminal (10) (11), sets the voice rate in response to the request to change the radio controller 30, 31, home position It is configured to request the voice transmission rate set in the terminal 10 (11) from the register 50.

The home location register 50 stores the user information, the location information, the additional service information, and the rating information of the voice transmission rate of the user setting of the terminal 10, 11, and interacts with the switch 40 and 41. Perform voice call processing and user authentication and provide a voice rate set in the terminal (10) (11).

The billing device 60 is configured to interoperate with the switch 40 and 41 to calculate a fee based on call information according to a holding time for each voice rate per unit call.

Operation of the above-described components and the components can refer to well-known WCDMA technology, and thus detailed description thereof is omitted here.

mode Bitrate combination AM4 12.20 Kbps / 7.95 Kbps AM5 10.20 Kbps / 6.70 Kbps AM6 7.95 Kbps / 5.90 Kbps AM7 7.40 Kbps / 6.70 Kbps AM8 6.70 Kbps / 5.90 Kbps AM9 5.90 Kbps / 4.75 Kbps

Table 2 shows the rate combination method in the multi-rate mode, which can be defined and used as a user-configured class having a small variation in the voice rate.

This is to overcome the problem that the rate of change of voice quality is greatly increased and the perceived quality of voice caller is suddenly changed when the rate is rapidly changed while the call rate combination method of Table 1 of the prior art is maintained. The variation can be reduced by reducing the difference between the maximum and the minimum of.

2 is a diagram illustrating a call processing procedure in a wideband code division multiple access system.

First, S210 is a process of establishing a Radio Resource Control (RRC) connection, and is a process of setting a signaling radio bearer (SRB), which is a path for transmitting a signaling message between the calling terminal 10 and the calling radio controller 30.

Through this process, a passage for transmitting and receiving a message between the calling terminal 10 and the calling radio controller 30 is established.

S220 is a service request and authentication process, when SRB setup is completed, the calling terminal 10 sends a service request message to the home location register 50 through the established signaling channel, and the home location register 50 sends the call. The terminal 10 undergoes an authentication process of whether the terminal 10 is a normal user and whether there is a service right, and transmits encryption related information about the traffic between the calling terminal 10 and the home location register 50.

S230 is a process of establishing a radio access bearer (RAB), which is a process for setting a path for user traffic between the calling terminal 10 and the CN (Core Network).

That is, a traffic radio bearer is established between the calling terminal 10 and the calling radio controller 30, and a bearer is established between the calling radio controller 30 and the calling exchange 40. By doing so, an RAB is established between the calling terminal 10 and the calling exchange 40.

S240 is a routing and paging process. In this process, the calling side exchange 40 confirms the called side exchange 41 and sends an incoming request message, and the called side exchange 41 sends paging to the called terminal 11.

S250 is an RRC connection establishment process. This is a similar process to S210 described above. When the called terminal 11 receives paging from the called radio controller 31, the SRB setup is started to send a paging response to the called radio controller 31.

S260 is a paging response and authentication process. Here, the called terminal 11 responds to the paging of the home location register 50 by sending a paging response message to the home location register 50 through the SRB set in step S250.

The authentication process for the called terminal 11 responding to paging is similar to the S220 process.

S270 is a RAB setup process, which is a process of establishing a radio radio bearer of the called terminal 11, and is similar to the process of S230.

S280 is an allerting and connecting process. A ring is ringed on the called terminal 11 and a call is received.

S290 is a data flow process, which is a state in which a call with the calling terminal 10 is opened by receiving at the called terminal 11 and is open.

Finally, S300 is a call release (Release) process.

Table 3 shows an example of voice rates defined for each user stored in the home location register.

The voice rate defined for each user may be stored in a device or server connected to a communication network to serve the caller and the called party at the corresponding voice rate. In an embodiment of the present invention, the voice rate for each terminal user is provided to the home location register 50. Is stored.

Phone number Voice rate  service mode 010-9001-0001 4.75 Kbps Single rate mode 010-9001-0002 5.15 Kbps Single rate mode 010-9001-0003 5.90 Kbps Single rate mode 010-9001-0004 6.70 Kbps Single rate mode 010-9001-0005 7.40 Kbps Single rate mode 010-9001-0006 7.95 Kbps Single rate mode 010-9001-0007 10.20 Kbps Single rate mode 010-9001-0008 12.20 Kbps Single rate mode 010-9001-0009 AM1 Multi rate mode 010-9001-0010 AM2 Multi rate mode 010-9001-0011 AM3 Multi rate mode 010-9001-0012 AM4 Multi rate mode 010-9001-0013 AM5 Multi rate mode 010-9001-0014 AM6 Multi rate mode 010-9001-0015 AM7 Multi rate mode 010-9001-0016 AM8 Multi rate mode 010-9001-0017 AM9 Multi rate mode 010-9001-0019 7.95 Kbps Single rate mode 010-9001-0018 AM2 Multi rate mode 010-9001-0019 AM6 Multi rate mode 010-9001-0020 12.20 Kbps Single rate mode

In order to assign a voice rate set for each user during a call, the exchange 40 or 41 inquires a corresponding voice rate for each user to the home location register 50, in the case of the calling terminal 10 in steps S220 and S230, and In the case of the called terminal 11, a corresponding voice transmission rate is allocated in steps S260 and S270.

To explain this in detail, in step S220, the calling side exchange 40 uses a 'MAP_SEND_AUTHENTICATION_INFO' service defined in the 3GPP Mobile Application Part (MAP) standard to set a user-specific setting class of the voice rate stored in the home location register 50. ).

At this time, since the 'MAP_SEND_AUTHENTICATION_INFO' parameter does not have a parameter related to the user's voice transmission rate, the user may receive information related to the voice transmission rate from the home location register 50 by modifying an existing parameter or using a new parameter.

The calling side exchange 40 transfers the voice rate queried from the home location register 50 to the calling side wireless controller 30 by using a 'RAB Assignment Request Message' in step S230, The calling radio controller 30 transmits the voice rate determined through the 'RB Setup Message' to the calling terminal 10.

On the other hand, in the multi-rate mode, the source radio controller 30 selects an appropriate voice rate within the user-specific voice rate range according to the wireless load of the base station to transmit to the source terminal 10.

Hereinafter, the voice rate allocation procedure will be described in more detail with reference to FIG. 3.

First, after the RRC connection is established between the calling terminal 10 and the CN (Core Network), the calling terminal 10 transmits an 'Initial Direct' message, which is an RRC message, to the CN (Core Network). (S305).

The originating radio controller 30 transmits an 'Initial UE' message to the originating exchange 40 through a radio access network application protocol (RANAP), which is a signaling protocol (S310). ).

The source exchange 40 transmits an 'Authentication Information' request message to the home location registerer 50 through a Mobile Application Protocol (MAP) to request user information inquiry (S315). At this time, the originating exchange 40 also requests the voice transmission rate class of the terminal user at the same time.

The home location register 50 inquires user information and voice rate information corresponding to the calling terminal 10 in response to the transmitted 'Authentication Information' request message, and then 'Authentication Information' (authentication information). The response message is transmitted to the calling side exchange 40 (S320).

At this time, of course, the 'Authentication Information' response message includes voice transmission rate information of the user.

In addition, between the originating terminal 10 and the originating exchange 40, it is determined whether to guarantee the integrity of mutual authentication and signaling traffic, whether to support encryption for the user traffic, and a use algorithm (S325).

Thereafter, the originating terminal 10 transmits an 'Uplink Direct Transfer' message, which is an RRC message, to the CN (Core Network), that is, the node B sends information related to the called terminal information and the call setup related resources. In step S330, the calling party wireless controller 30 transmits the information to the calling party wireless controller 30 at step S335.

CN (Core Network) is information (Call Proceeding) that the call setup is being processed in response to the 'Uplink Direct Transfer' (uplink indication transmission) message sent for the call setup request from the originating terminal 10, that is, ' Downlink direct transfer 'message to the originating radio controller 30 (S340), and the originating radio controller 30 is transmitted to the originating terminal 10 through the Node B 20; It transmits (S345).

Then, the CN (Core Network) transmits a 'RAB Assignment Request' message for requesting the RAB setting for the terminal 10 through the source exchange 40 to the source radio controller 30 ( S350).

At this time, the 'RAB Assignment Request' message includes voice transmission rate information of the user determined in steps S315 and S320, and in this case, the CN (Core Network) transmits a 'RAB Assignment Request' message. Set and send the RAB parameter in the following way.

That is, in the single bit rate mode, the maximum bit rate and the minimum bit rate are set to be the same, and this value is the voice bit rate of the user.

In the multi-rate mode, the maximum bit rate is set to the highest voice rate among the voice rate combinations of the user, and the minimum bit rate is the lowest voice rate among the voice rate combinations of the user. Is set.

In a state in which radio link reconfiguration is completed between the originating radio controller 30 and the originating node B 20 (S355), the originating radio controller 30 is the originating terminal 10; In step S360, information about a new radio bearer (RB) setting is transmitted.

In this case, in case of multi-rate mode, in case of AM4, AM5, AM6, AM7, AM8, and AM9 other than AM1, AM2, and AM3 defined in the 3GPP standard, 'Transport Channel Parameter' in the RB setting message is shown in the following table. By transmitting the same value as the 'transmission channel parameters' of AM1, AM2, and AM3 as shown in Fig. 4, a combination of voice data rates not defined in the 3GPP standard can be applied to meet the standard.

In this case, the transport channel parameter includes information on the voice data rate that the calling terminal 10 should support.

mode Bitrate combination Transmission channel parameters AM4 12.20 Kbps / 7.95 Kbps AM1 AM5 10.20 Kbps / 6.70 Kbps AM2 AM6 7.95 Kbps / 5.90 Kbps AM1 AM7 7.40 Kbps / 6.70 Kbps AM3 AM8 6.70 Kbps / 5.90 Kbps AM2 or AM3 AM9 5.90 Kbps / 4.75 Kbps AM1, AM2, or AM3

Finally, in response to the 'Radio bearer Setup' message, the calling terminal 10 transmits a 'Radio Bearer Setup Complete' message indicating that RB is completed in the terminal. Sending to the controller 30 (S365), the source radio controller 30 transmits a 'RAB Assignment Response' (RAB setup response) message to the CN (Core Network) through the source exchange 40 (S370) ), The service provision setting according to the voice rate allocation is completed.

Hereinafter, a procedure of changing the voice rate according to the wireless load in the multi rate mode will be described.

First, a process of changing to a lower voice rate (downlink voice rate control process) when the node B transmit power is higher than a preset value will be described.

The originating node B 20 measures the transmission output of the corresponding cell (S410), and transmits the measured transmission output value of the cell to the originating radio controller 30 (S420).

The originating radio controller 30 requests the originating exchange 30 to change to a low voice rate when the transmission output value of the cell reported by the originating node B 20 is higher than a threshold value. (S430).

At this time, the originating radio controller 30 determines that the RNC is between the maximum bit rate and the minimum bit rate of the RAB parameter transmitted through a 'RAB Assignment Request' message. The transmission rate is requested to the source exchange 40, so as not to deviate from the voice transmission rate range for each class of the multi-rate mode service.

The calling side exchange 40 sets a voice rate suitable for the condition and transmits the changed voice rate to the calling side wireless controller 30 (S440), and the calling side wireless controller 30 sets the changed voice rate. Notify the calling party terminal 10 (S450).

Meanwhile, when the reception output of the Node B is higher than a preset value, the process of changing to a lower voice rate (Uplink voice rate control process) is as follows.

The originating node B 20 measures the reception output of the corresponding cell (S510) and transmits the reception output value of the corresponding cell to the originating radio controller 30 (S520).

The originating radio controller 30 requests the originating terminal 10 to change to a low voice rate when the reception output value transmitted from the originating node B 20 is higher than a threshold value. S530).

At this time, the originating radio controller 30 determines the transmission rate between the maximum bit rate and the minimum bit rate of the RAB parameter transmitted through a 'RAB Assignment Request' message. So as not to deviate from the voice rate range of each class of the multi-rate mode service.

The calling party terminal 10 sets a voice rate suitable for the condition and transmits the changed voice rate to the calling party radio controller 30 (S540). Accordingly, the calling party wireless controller 30 transmits the information of the changed voice rate. Report to the source exchange 40 (S550).

Hereinafter, the charging method for the single voice rate mode and the multiple voice rate mode will be described.

The source exchanger 40 calculates a holding time (HT) for each voice rate per unit call and transmits it to the charging device 60.

The billing device 60 calculates the fee per call using the unit call information notified from the originating exchange 40 based on the rate table as shown in the following table.

Voice rate Per hour Unit time 4.75 Kbps M1 won T1 5.15 Kbps M2 won T2 5.90 Kbps M3 won T3 6.70 Kbps M4 won T4 7.40 Kbps M5 won T5 7.95 Kbps M6 won T6 10.20 Kbps M7 won T7 12.20 Kbps M8 won T8 AM1 M9 won T9 AM2 M10 Won T10 AM3 M11 won T11 AM4 M12 Won T12 AM5 M13won T13 AM6 M14won T14 AM7 M15 Won T15 AM8 M16 Won T16 AM9 M17 KRW T17

In this case, the fee per call may be calculated by, for example, the following equation.

Price per room = Price per unit time x (Maintenance time / unit time)

There are three types of charging methods for voice rate.

First, a fixed rate is added in a single rate mode.

When the service user selects the single rate mode, the service is provided at the corresponding voice rate and a fixed fee is added. That is, in the above formula, the rate per unit time is fixed to a rate corresponding to the voice transmission rate selected by the service user (from M1 to M8 in Table 5).

Second, the fixed rate is added in the multi-rate mode.

When the service user selects the multiple data rate mode, the service is variably provided within the range of the voice data rate corresponding to the selected voice data rate level and a fixed fee is added. In this case, the price per unit time in the above formula is fixed to a rate corresponding to the voice transmission rate class selected by the service user (from M9 to M17 in Table 5).

Third, a variable rate is added in the multi-rate mode.

When the service user selects the multi-rate mode, the service is variably provided within the voice rate range corresponding to the selected voice rate class, and the rate per unit time corresponding to the provided voice rate is variably added. For example, if a service user selects mode AM1 and makes a voice call for HT1 hour at 12.20 Kbps, HT2 hour at 7.95 Kbps, HT3 hour at 5.90 Kbps, and HT4 hour at 10.20 Kbps, the charge per call is as follows.

Rate per room = ( M8  x HT1 Of T8 ) + ( M6  x HT2 Of T6 ) + ( M3  x HT3 Of T3 ) + ( M7  x HT4 Of T7 )

6 is a flowchart illustrating a charging process by voice rate according to the present invention.

A call is set up from the source radio controller 30 to the source exchange 40 (S610), and the source exchange 40 accumulates and records the duration of the voice rate (S620).

As the accumulation for the duration of the voice rate ends, the calling side exchange 40 notifies the calling side radio controller 30 of the end of the call (S630).

The calling side exchange 40 notifies the charging apparatus 60 of the duration and information of the voice transmission rate according to the call setup (S640), and the charging apparatus 60 of the provided voice transmission rate of the provided voice transmission rate. The billing for each subscriber / call is calculated using (S650).

Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art to which the present invention pertains can implement the present invention in other specific forms without changing the technical spirit or essential features, The examples are to be understood in all respects as illustrative and not restrictive.

In addition, the scope of the present invention is specified by the appended claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts are included in the scope of the present invention. Should be interpreted as

According to the present invention, a voice rate differentiation service system and a method of providing the same provide a voice service at various speeds to a terminal user by differentiating a voice rate allocated to a voice service in an existing broadband code division multiple access system. Differential rates based on speed provide cost savings.

That is, it is possible to provide a variety of opportunities for selection by providing a voice rate of speed and quality suitable for cost without providing a collective high speed and expensive voice rate to the terminal user.

In addition, it increases the voice capacity per base station to the service provider, and at the same time provides a pioneering service market of various types, such as absorbing the second generation voice service users.

In other words, in case of providing 12.20 Kbps of high speed and high quality voice transmission rate per station, theoretically acceptable capacity is 128 terminal users or 4.75 Kbps of low speed and low quality voice transmission rate. The possible capacity could theoretically be 256 terminal users, increasing the voice capacity per base station.

In addition, the second generation voice service users can be brought to the market of broadband code division multiple access system, and finally, the expansion of user capacity per base station can reduce the overall system investment cost.

In addition, there is an effect of preventing a sudden change in the quality of experience of the voice caller by applying a class with a small change in the voice transmission rate.

Claims (12)

In a wideband code division multiple access system providing voice service differentiated by voice rate, A node B which relays a terminal and a wireless controller which transmits and receives voice data through wireless communication and measures a transmission output of a corresponding cell and provides the measured power to the wireless controller; A wireless controller which compares a threshold with reference to a transmission output provided in association with the node B and requests a switch to change a voice transmission rate; A switch configured to set a voice rate in response to a change request of the radio controller, and request a voice rate of the terminal from a home location register; A home location register which stores user information of the terminal, location information and rating information of a user set voice transmission rate, interacts with the exchange to perform voice call processing and user authentication, and provides a voice transmission rate set in the terminal to the exchange; And And a billing device that interworks with the switch and charges the call through call information according to the maintenance time for each voice rate per unit call when transmitting and receiving voice data of the terminal based on a set voice rate. . The method of claim 1, The voice rate is controlled by the Adaptive Multi-Rate (AMR) codec. In the multi-rate mode, a user-configured class having a small variation according to the difference between the maximum and the minimum of the voice rate is used to prevent a sudden change in the haptic quality of the voice call. A voice rate differentiation service system, characterized in that a combined voice rate is supported. The method according to claim 1 or 2, And the voice rate is changed in units of 20ms frame based on the load, channelizing code occupancy, and service quality of the wired / wireless section in the wireless controller. A radio controller establishes a Radio Resource Control (RRC) connection with a terminal and transmits an initialization message of the terminal to a switch using a radio access network application protocol (RANAP), which is a signaling protocol according to the reception of an initialization instruction message from the terminal. In the voice rate differentiation service method, a) requesting inquiry of user information and voice transmission rate of the calling terminal by transmitting an authentication information request message from the calling exchange to a home location register through a mobile application protocol to confirm whether the calling terminal is a normal subscriber; b) inquiring, by the home location register, the user information and voice rate of the calling terminal in response to the authentication information request message of the calling exchange and providing the calling information to the calling exchange in the form of an authentication information response message; c) after the authentication, determine the mutual authentication between the terminal and the exchange, guarantee the integrity of signaling traffic, determine whether to support encryption for user traffic, and use algorithm, and transmit an uplink indication requesting call establishment from the terminal to the wireless controller. Providing an indication transmission message from the wireless controller to the exchange in response to providing the message; d) providing a downlink indication transmission message in response to the uplink indication transmission message from the exchange to the radio controller indicating a downlink indication transmission message and providing an indication transmission message to the terminal; e) providing a RAB setup request message requesting RAB (Radio Access Bearer) setup from the exchange to the wireless controller, and transmitting a voice rate of the calling terminal; f) providing a radio bearer setup message from the radio controller to the terminal in a state where radio resource allocation is completed to establish a new radio bearer between the radio controller and the Node B; And g) providing a radio bearer setup complete message indicating a setup completion state of voice rate allocation from the terminal to the wireless controller, and providing a RAB setup response message from the wireless controller to the exchange. How to Provide Rate Differentiation Services. 5. The method of claim 4, C), c-1) measuring the reception output of the corresponding cell at Node B and providing the reception output value of the corresponding cell to a radio controller; c-2) requesting a low rate voice rate change from the radio controller to the terminal when the received output value of the corresponding cell is higher than a threshold value, and c-3) changing the voice transmission rate of the lower level in the terminal, and notifying the exchange of the changed voice transmission rate information. 5. The method of claim 4, Step d), d-1) measuring the transmission output of the corresponding cell at Node B and providing the transmission output value of the corresponding cell to the radio controller; d-2) requesting a low level voice rate change from the radio controller to the exchange if the transmit power value of the provided corresponding cell is higher than a threshold, and d-3) changing the voice transmission rate of the low level in the exchange, and notifying the terminal of the information of the changed voice transmission rate. The method according to claim 5 or 6, The radio controller requests the terminal for a transmission rate between the maximum bit rate and the minimum bit rate of the RAB parameter transmitted through the RAB configuration response message, but does not depart from the voice rate range for each class of the multi-rate mode. How to Provide Rate Differentiation Services. 5. The method of claim 4, The RAB setting request message of step e) includes voice rate information of the terminal user determined in step c). The method according to claim 4 or 8, In the single bit rate mode, the RAB parameter of the RAB setting request message is set to the same bit rate as the maximum bit rate and the minimum bit rate, and in the multi bit rate mode, the maximum bit rate is equal to the voice bit rate of the terminal user. The highest voice rate among the combinations is set, and the minimum bit rate is the lowest voice rate among the combination of the voice rate of the terminal user is the voice rate differentiation service providing method is set. 5. The method of claim 4, After step g), h) establishing a call from the wireless controller to the exchange and accumulating the duration of the voice rate; i) providing information and duration of voice rate from the exchange to the charging device as the call between the radio controller and the exchange terminates, and j) The method for providing a voice rate differentiation service, further comprising the step of calculating the charge for each subscriber / call from the billing device using the information and the duration of the provided voice rate. The method of claim 10, The billing by subscriber / door to door, A method of providing a voice rate differentiation service, which is calculated by multiplying a unit time per maintenance time by a unit price per unit time. The method according to claim 10 or 11, wherein The charging for the unit call information of the voice transmission rate, How you charge a flat rate in single bit rate mode, In a multi-rate mode, a method of variably providing a service and charging a fixed rate within a voice rate range corresponding to a selected voice rate class, and A method of providing a voice rate differentiation service, characterized in that the service is variably provided within a range of a voice rate corresponding to the selected voice rate class in a multi-rate mode and the rate is charged variably per unit time. .

Images