KR100379407B1 - Mobile communication system for transmitting or receiving voice or low speed / high speed data - Google Patents

Abstract

The present invention provides voice or low speed / high speed data service for providing a voice or low speed / high speed data service in a personal communication service network, a cellular system, and a wireless local loop by an IS-95B. A mobile communication system for high speed data transmission and reception. As described above, the present invention works with a plurality of base stations, a plurality of communication networks for receiving radio signals transmitted from the base stations, a plurality of selectors / vocoder cards, selectors / vocoder cards including a plurality of vocoders and a radio link protocol processor. And a base station controller having a dedicated radio link processor for processing high speed data, a mobile switching station having a high level data link controller (HDLC) and a frame relay, and a network interlocking device connected to the mobile switching station. The base station controller allocates the arbitrary vocoder to perform data communication with the mobile switching center when the requested service is the voice service, and bypasses any vocoder when the required service is the low-speed line service. To ensure data communication with the required services In the case of the existing high-speed line service, data frames inputted using a plurality of auxiliary channels in one basic traffic channel are multiplexed and demultiplexed and transmitted to the wireless link processor, so that the wireless link processor and the data are connected to the high level data link controller. To be communicated.

Description

Mobile communication system for transmitting or receiving voice or low speed / high speed data

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a next generation mobile communication system, and in particular, voice or low speed / high speed data service in a personal communication service network, a cellular system, and a wireless local loop by IS-95B. The present invention relates to a mobile communication system for transmitting or receiving voice or low speed / high speed data.

1 is a block diagram showing a mobile communication system for transmitting or receiving voice or low speed data according to the prior art to satisfy the IS-95A standard.

Referring to FIG. 1, a conventional mobile communication system for transmitting and receiving is for executing a voice or low speed (13.3 Kbps) data service for satisfying the IS-95A standard. If a voice service is requested between the base stations BTS11 to BTS13, a vocoder for processing the voice frame is allocated to code a voice frame to make an encoded voice packet.

In this case, the voice frame output from the vocoder is allocated to one time slot of a relay trunk connected between the base station controller (BSC) 20 and the mobile switching center (MSC) 30 and transmitted to the mobile switching center (MSC) 30. .

On the other hand, when the communication subscriber requests circuit data service, the prepared data frame is one of the relay trunks connected between the base station controller (BSC) 20 and the mobile switching center (MSC) 30 without passing through the vocoder in which the voice frame is processed. The time slot is allocated and delivered to the mobile switching center (MSC) 30 immediately.

At this time, the selector / vocoder card (SVC) 24, 25 equipped with the RLP processor is in charge of all call processing and data services of voice or low-speed line data in the wireless section using the traffic channel.

Therefore, all line data transmitted through the radio section is first distinguished between voice frames and line data frames via the selector / vocoder (SVC) 24, 25, and in the case of a voice service, a vocoder that processes voice frames. Is directly connected to the mobile switching center (MSC) 30, and in the case of a line data service, the line data frame bypasses the vocoder and is transmitted to the mobile switching center (MSC) 30.

Here, the voice frame should be transmitted at a transmission rate of 64 Kbps. Therefore, in case of voice service, voice frame is transmitted through relay trunk (E1), which is a common communication channel (PCM Highway) using pulse protection modulation scheme of 64 Kbps, and in case of line data service, unconditional 1 even though data amount is 13.3 Kbps. It is loaded on the 64Kbps bandwidth of the time slot and transmitted to the called party.

In the mobile communication system for voice or low-speed line data simultaneous service by IS-95A according to the prior art, when a subscriber needs voice or low-speed line data simultaneous service, Up to 13.3 Kbps is transmitted using only 2 traffic channels.

Accordingly, the transmission / reception apparatus for processing line data is also designed for the transmission rate of low-speed line data frames, and thus there is a problem in that voice or line data simultaneous service cannot be executed at high speed.

In addition, even if the amount of data is 13.3 Kbps, the voice or line data frame can be transmitted to the called party by being loaded on the 64 Kbps bandwidth of one time slot unconditionally, which causes a problem in that the efficiency of the channel is reduced. This problem will be a factor that greatly reduces the availability of communication resources in the future multimedia communication environment.

The present invention has been made to solve such a problem, and an object of the present invention is to add an HDLC processor to a mobile switching center of a mobile communication system. It is to provide a mobile communication system for high-speed data transmission and reception.

Another object of the present invention is to add a high-speed data processing dedicated RLPA and HDLC processor to the conventional mobile communication system, it is possible to transmit and receive more data than the conventional, and the voice line, slow / high speed data without a dedicated trunk line trunk line The present invention provides a mobile communication system for transmitting / receiving voice or low speed / high speed data, which can reduce transmission of resources of a trunk line, which can be transmitted through a bandwidth.

Another object of the present invention is to directly connect to a network interworking device and a frame relay to handle the final data service to transmit more data when the maximum speed of adding a plurality of auxiliary channels to one basic channel is more than 64Kbps An object of the present invention is to provide a mobile communication system for transmitting or receiving voice or low speed / high speed data that can transmit data through a channel allocated at a variable rate.

One feature of a mobile communication system for transmitting or receiving voice or low speed / high speed data according to the present invention for achieving the above object is a plurality of base stations, a plurality of communication networks for receiving a radio signal transmitted from the base station and a plurality of vocoder and wireless A plurality of base station controllers, interworking with a selector / vocoder card and a selector / vocoder card including a link protocol processor, and a dedicated radio link processor for processing high-speed data, a high level data link controller (HDLC) and a frame relay And a network interlocking device connected to the mobile switching center, wherein the base station controller allocates the arbitrary vocoder to perform data communication with the mobile switching center when the requested service is the voice service. If the service is the slow line service, Bypassing the coder to the data exchange with the mobile switching center, and if the required service is the high-speed line service, multiplexing / demultiplexing the input data frame using a plurality of auxiliary channels in one basic traffic channel to the wireless Transfer to a link processor, such that the wireless link processor is in data communication with the high level data link controller.

1 is a block diagram showing a mobile communication system for voice or low speed data transmission and reception according to the prior art for satisfying the IS-95A standard.

Figure 2 is a block diagram showing a mobile communication system for transmitting or receiving voice or low speed / high speed data according to an embodiment of the present invention to satisfy the IS-95B standard.

3 is a block diagram illustrating a mobile communication system for transmitting or receiving voice or low speed / high speed data according to a second embodiment of the present invention for satisfying the IS-95B standard;

4 is a block diagram illustrating a mobile communication system for transmitting or receiving voice or low speed / high speed data according to a third embodiment of the present invention for satisfying the IS-95B standard;

5 is a diagram showing an HDLC frame format used in a mobile communication system for simultaneous voice or low speed / high speed data transmission service according to the present invention.

Explanation of symbols for main parts of the drawings

123,125: Central CDMA Interconnect Network

124: Mobile CDMA Interconnect Network

121, 122, 221, 223, 321, 324: Selector / Vocoder card

131, 232,: high level data link controller

132, 233: Frame Relay

140, 240, 340: Interlocking Device (IWF)

222, 224, 322, 325: Radio Link Processor Assembler

323,326: Frame Relay Processor Assembler

Hereinafter, a preferred embodiment of a mobile communication system for transmitting or receiving voice or low speed / high speed data according to the present invention will be described with reference to the accompanying drawings.

First, a description will be given of a mobile communication system for transmitting and receiving according to the present invention for processing a subscriber to transmit and receive voice, circuit data, high-speed data.

In the IS-95B, when transmitting high-speed packet data in a wireless section, one fundamental channel is used, or up to seven secondary channels are provided in one fundamental channel. ) Can be extended.

In this case, if only one basic channel is used, the communication method according to the IS-95A standard can be applied as it is, but up to seven secondary channels may be provided in one basic channel. In the case of extended use, the mobile communication system shown in Figs. 2, 3 and 4 is required.

2 is a block diagram illustrating a mobile communication system for transmitting or receiving voice or low speed / high speed data according to an embodiment of the present invention to satisfy the IS-95B standard.

Referring to FIG. 2, the mobile communication system for voice or low speed / high speed data transmission / reception according to the present invention is for executing a voice or low speed / high speed data service to satisfy the IS-95B standard, and includes a plurality of base stations (BTS11, BTS21, BTS31, a plurality of base station controllers (BSC) 120, a mobile switching center 130 and a network interworking device (IWF) 140, the plurality of base station controllers (BSC) (120) Central CDMA Inter-Network Unit / CDMA Inter Network (123, 125) for connecting the base stations BTS11, BTS21, and BTS31 to the base station controller 120, and the Central CDMA Inter-network. It consists of a Mobile CDMA Inter Network Unit (124) and a plurality of selector / vocoder cards (SVC / MSD RLP1, SVC / MSD RLP2) 121, 122 that interconnect the / CDMA interconnect networks 123, 125. .

The mobile switching center 130 also includes a high-level data link controller (hereinafter referred to as HDLC) 131 and a frame relay 132.

In the mobile communication system for voice or low speed data transmission and reception according to the IS-95A standard of the prior art, the HDLC 131 is added to the MSC 130 only.

In addition, each selector / vocoder card (121, 122) includes a radio link protocol (RLP) processor and eight vocoders, respectively, and can handle one 64 Kbps HDLC 131, which processes an individual voice service and normally When requesting speed data (hereinafter, abbreviated as MSD), transmission and reception services through up to eight channels are simultaneously supported.

More specifically, each selector / vocoder card 121, 122 performs all call processing and data processing of voice, circuit data, and high-speed data, and includes RLP data transmitted from a wireless section including an RLP processor. It is divided into any one of voice, circuit data, and high speed data.

In this case, when the RLP data transmitted from the radio section is voice, it is directly connected to the mobile switching center (MSC) 130 through the vocoder provided in the selector / vocoder card 121 or 122, and in the case of circuit data, the vocoder is connected. Bypass is transmitted to the mobile switching center 130 without performing voice processing.

In this case, when the circuit data is high-speed data that adds up to seven auxiliary channels to one basic channel, the RLP frame inputted to each code channel (Long Code) is multiplexed or demultiplexed and framed. When the high speed data is passed to the HDLC 131, the HDLC 131 allocates one time slot of 64 Kbps to a relay trunk, which is a common communication channel (PCM Highway) using a pulse code modulation method, to allocate the high speed data to the HDLC. High-speed data is transmitted and received with the destination HDLC (not shown) in a format.

The mobile switching center 130 knows which time slot the transmitted / received high-speed data is allocated and received through the control information channel of 64 Kbps in the relay trunk E1, and the HDLC 131 transmits the received high-speed data. Receive and convert the frame interworking device (IWF) 140 to process the final data service to the frame relay format (Frame Relay Format) and then through the frame relay (132 Relay) network interworking device (IWF) (140).

The reason why 64Kbps 1 time slot is used in such a communication system for voice or low speed / high speed data transmission and reception is that the voice or circuit data is 64Kbps as a basic service, so that high-speed data can be used simultaneously with voice or circuit data without a dedicated relay trunk. One relay trunk E1 can be loaded and transmitted. In addition, the mobile communication system for transmitting or receiving voice or low speed / high speed data of FIG. 2 only needs to indicate which time slot is allocated for high speed data transmission and reception, and thus the conventional mobile communication system for transmitting or receiving voice or low speed data of FIG. The protocol used by is used as it is.

Here, the maximum transmission rate is limited to 64Kbps or less the rate of adding a plurality of auxiliary channels to one base channel.

Referring to FIG. 3, a transmission / reception apparatus according to a second embodiment of the present invention includes a plurality of base stations (BTS11, BTS12, BTS13), a plurality of base station controllers (BSCs) 220, a mobile switching center 230, and a network. A central CDMA interconnection network (IWF) 240 and a plurality of base station controllers (BSCs) 220 connect the plurality of base stations (BTS11, BTS12, BTS13) with the base station controller 220 ( Mobile CDMA Inter Network Unit (226) interconnects the Central CDMA Inter-Network Unit / CDMA Inter Network (225,227) and the Central CDMA Inter-Network / CDMA Inter-Network (225,227). ), A first selector / vocoder card (SVC1) 221 and a second selector / vocoder card (SVC2) 223, and a Radio Link Processor Assembler (hereinafter abbreviated as RLPA) (222,224) It consists of.

The mobile switching center 130 also includes an HDLC 232, a frame relay 233, and a voice processor 231.

Here, each selector / vocoder card 221, 223 performs all call processing of voice, circuit data, and high speed data. For example, in the case of high-speed data, it is determined how many channels are to be multiplexed, and the RLPA 222 and 224 are processed after the traffic channel is established. However, in the case of voice or circuit data, the selector / vocoder cards 221 and 223 are processed.

Since the selector / vocoder cards 221 and 223 are equipped with a dedicated RLP processor, the RLP data transmitted from the wireless section is input to the selector / vocoder cards 221 and 223 and divided into any one of voice, circuit data, and high speed data.

In the case of voice data, it is directly connected to the mobile switching center 230 through the vocoder provided in the selector / vocoder cards 221 and 223. In the case of circuit data, the voice data is bypassed without passing through the vocoder to the mobile switching center 230. Is sent. In this case, in the case of circuit data, up to seven auxiliary channels are added to one basic channel, and if each of the transmitted data is high-speed data, the RLP frame is framed by multiplexing or demultiplexing and RLPA via the IPC packet bus. When data is passed to 222 and 224, the RLPA 222 and 224 allocates one time slot of 64 Kbps to the high-speed data through a relay trunk, which is a common communication channel (PCM Highway) in which the HDLC 232 uses a pulse code modulation scheme. It is possible to transmit and receive high speed data with a destination HDLC processor (not shown) in a format.

Here, the mobile switching center 230 of FIG. 3 performs the same operation as the mobile switching center 130 of FIG. Also, the reason for using one time slot HDLC 232 of 64 Kbps is that since voice or circuit data is 64 Kbps as a basic service as shown in FIG. 2, high-speed data can be relayed simultaneously with voice or circuit data without a dedicated relay trunk. In order to be able to transmit on the trunk (E1).

However, in FIG. 3, the rate of adding several auxiliary channels to one basic channel is limited to 64 Kbps or less.

4 is a block diagram illustrating a mobile communication system for transmitting / receiving voice or low speed / high speed data according to a third embodiment of the present invention for satisfying the IS-95B standard.

Referring to FIG. 4, a transmission and reception apparatus according to a third embodiment of the present invention includes a plurality of base stations BTS11, BTS12, and BTS13, a plurality of base station controllers (BSCs) 321, a mobile switching center 330, and a network. It consists of an interworking device (IWF) 340, a public switched network (PSTN) 350, and an Internet / packet network 360 connected to the network interworking device (IWF) 340, a plurality of base station controllers (BSC) 321 includes a Central CDMA Inter-Network Unit / CDMA Inter Network for connecting the plurality of base stations BTS11, BTS12, and BTS13 to the base station controller 321; A Mobile CDMA Inter Network Unit, which interconnects the CDMA Inter-Network / CDMA Inter-Network, a first selector / vocoder card (SVC1) 321 and a second selector / vocoder card (SVC2) 324 And a first Radio Link Processor Assembler (hereinafter abbreviated as RLPA) 222 and a second radio. Consists of, (hereinafter abbreviated, FRPA Frame Relay Processor Assembler) (323,326) greater processor assembler 224, and a frame link processor assembler.

Here, if the maximum transmission rate obtained by adding a plurality of auxiliary channels to one base channel is 64Kbps or more and occupies up to eight channels at the rate of 13.3Kbps, 8 × 13.3Kbps = 102.4Kbps. Accordingly, a network connection is directly performed to the FRPA 323 and 326 with the network interworking device 340 that processes the final data service in order to transmit more data, and thus data can be transmitted through channels allocated at various transmission rates.

If the RLP processor included in the selector / vocoder cards 321 and 324 determines that there are too many high-speed data services allocated to the transmitter / receiver card, the RLP processor performs flow control when the capacity of the buffer exceeds 70%. In this case, the flow control performs data processing at the same time to increase the channel to the communication subscriber using a plurality of channels (2 to 7 auxiliary channels) and at the same time controls the data throughput, when the high-speed data service is reduced again Return to the state of.

As described above, in the high-speed communication having the structure of FIG. 4, the data link using the HDLC method between the RLPAs 322 and 325 and the mobile switching center 330 has the following functions.

First, as shown in FIG. 5, the HDLC frame format includes a flag bit F1, a data length bit F2, and a control bit F3 for distinguishing information of a data frame. And an error check (CRC) bit F5 for detecting an error bit of the HDLC frame.

The link control bit F3 of the HDLC is carried in the control information of the HDLC frame, and is related only to the flow control between the RLP and the mobile switching center. Here, the flow control distinguishes between the case where the data information of the HDLC frame is pure data information and the case where the control information is control information. In the case of data information, the data is passed to a selector provided in the selector / vocoder cards 321 and 324. However, as network congestion is displayed, transmission of the data information received by the RLPA 322 and 325 is suspended. In addition, if the internal buffer exceeds a threshold for network congestion, the RLPA 322,325 causes the selector to reduce the allocation of radio channels.

When the mobile switching center 330 receives the congestion message, the mobile switching center 330 transmits the same congestion message to the network interworking device (IWF) 340 to perform flow control accordingly.

As described above, in the mobile communication system for voice or low speed / high speed data transmission / reception according to the present invention for satisfying the IS-95B standard, by adding an HDLC processor to the mobile switching center of the conventional mobile communication system, Of course, voice and low-speed data can also be transmitted over the E1 trunk line, thus reducing the resource waste of trunk allocations that allocate bandwidth.

In addition, by adding a dedicated RLPA and HDLC processor dedicated to high-speed data processing in a conventional mobile communication system, it is possible to transmit and receive more data than conventional, and to transmit voice, low-speed and high-speed data through a trunk line without a dedicated trunk line. Therefore, it is possible to reduce resource waste of trunk lines allocated to bandwidth.

In addition, if the maximum speed of adding multiple auxiliary channels to one basic channel is 64Kbps or more, a variable rate is directly connected to a network interworking device and a frame relay that processes the final data service in order to transmit more data. Since data is transmitted through the channel assigned to), high-speed data service is possible.

Claims (4)

A plurality of base station controllers having a plurality of base stations, a plurality of communication networks for receiving radio signals transmitted from the base stations, a plurality of selectors / vocoder cards including a plurality of vocoders and a radio link protocol processor, and a high level data link controller. A mobile switching center having an HDLC and a frame relay, and a network interlocking device connected to the mobile switching center, wherein the base station controller allocates the arbitrary vocoder when the required service is a voice service, and the data with the mobile switching center. To communicate with the mobile switching center by bypassing any vocoder if the required service is the low-speed line service, and multiple data on one basic traffic channel if the requested service is the high-speed line service. Data frame input using auxiliary channel Multiplexing / demultiplexing by voice or low-speed / high-speed data transmission and reception for a mobile communication system, characterized in that to ensure that the mobile switching center and the data communication. Interworking with a plurality of base stations, a plurality of communication networks for receiving radio signals transmitted from the base stations, a plurality of selectors / vocoder cards and selector / vocoder cards including a plurality of vocoders and a radio link protocol processor, and processing high-speed data A base station controller having a dedicated radio link processor for the mobile station; a mobile switching station having a high level data link controller (HDLC) and a frame relay; and a network interlocking device connected to the mobile switching station. If the voice service is assigned to the arbitrary vocoder to be in data communication with the mobile switching center, if the required service is the low-speed line service bypassing any vocoder to be in data communication with the mobile switching center, The service required is the high speed line service. In this case, by multiplexing / demultiplexing data frames inputted using a plurality of auxiliary channels in one basic traffic channel, the data frames are transmitted to the wireless link processor, so that the wireless link processor communicates data with the high level data link controller. A mobile communication system for transmitting and receiving voice or low speed / high speed data. Interworking with a plurality of base stations, a plurality of communication networks for receiving radio signals transmitted from the base station, a plurality of selectors / vocoder cards and selector / vocoder cards including a plurality of vocoder and a radio link protocol processor, and processing high-speed data A base station controller having a dedicated radio link processor and a frame relay processor, a mobile switching station having a high level data link controller (HDLC) and a frame relay, and a network interlocking device connected to the mobile switching station. When the required service is a high-speed line service, the multiplexed / demultiplexed data frames are transmitted to the radio link processor by using a plurality of auxiliary channels in one basic traffic channel, and the radio link processor transmits the frame relay. The network through a processor Such devices and connected to a voice or low-speed / high-speed data transmission and reception for a mobile communication system, characterized in that for performing the data communication with the traffic channels allocated to variable rate. 4. The method of claim 3, wherein the radio link protocol processor controls to increase the number of current traffic channels to a user who is using a plurality of channels when the high speed data processing allocated to the radio link protocol processor is greater than a preset threshold. And when the high-speed data processing is less than the threshold, returning to an original state.