KR19990084445A - Medium access control sublayer (MAC) of mobile communication system and communication control method using same - Google Patents

Abstract

The present invention performs various self-functions preset for the next generation mobile communication system for multimedia communication, and also performs the upper and lower layers and various communication control functions set in advance. And a communication control method using the same, the present invention transmits information for synchronization from one calling party to a plurality of called parties, sets up a dedicated control channel between the calling party and the called party, A connection-oriented point-to-point service for a synchronization, broadcast and common channel controller for performing call setup between the calling party and the called party using a channel, and an upper layer of the synchronization, broadcast and common channel controller. ) Is provided as a bidirectional operating system between the calling party and the called party, and is formed between the calling party and the called party. It consists of a dedicated control channel for performing the quality monitoring (Quality Monitoring) of the link line.

Description

Medium access control sublayer (MC) of mobile communication system and communication control method using same

The present invention relates to a medium access control sub-layer (hereinafter referred to as MAC) of a next generation mobile communication system and a communication control method using the same. More particularly, the present invention is set in advance for a next generation mobile communication system for multimedia communication. The present invention relates to a medium access control sublayer (MAC) of a mobile communication system that performs various self functions and performs various communication control functions with a higher to lower layer and a communication control method using the same.

In recent years, the development of mobile communication system is very rapid in each country. The digital mobile communication methods proposed to date have been proposed such as frequency division multiple access (FDMA), time division multiple access (TDMA), and code division multiple access (CDMA). Some countries or regions may use only one of the various access methods described above, or may use different types of mobile communication systems in parallel. Moscow, for example, uses both a CDMA mobile communication system and a GSM (Global System for Mobile Communication) mobile communication system. In this case, each mobile terminal or networks (or base station) should be provided with at least two types of modulation and demodulation modules in order to control two kinds of signals interchangeably. These conditions reverse the global trend of thin and short communication equipment, which weakens the product's competitiveness.

In addition, even if the same communication method is used in the same region, there are many restrictions on the size and function of the product depending on the characteristics of the manufacturers and operators of mobile terminals and other communication devices and the options of each product. At any time, these factors do not correspond to the requirements of the mobile communication service to provide a call service at any place.

Therefore, studies are being actively conducted to increase the compatibility of communication devices between users using the same communication method in the same region to provide mobile communication services regardless of manufacturers and communication operators. As a representative example thereof, a digital European Telecommunication (DECT) system may be mentioned. DECT was developed because of the need to provide wireless-coded communications that are voice-based and can accommodate some data communication needs. Therefore, DECT provides interoperability between equipments of manufacturers of different communication equipments, thereby providing users with various communication services for voice and data as basic services as well as optional extension services.

This layer of DECT defines a protocol of four layers as shown in FIG. 1 is a block diagram showing the structure of a layered protocol stack of a DECT.

Conventional DECT is divided hierarchically into OSI layer 1 (10) representing all of the physical layer and part of the MAC layer of the DECT, and OSI layer 2 (20) representing all of most of the MAC layer and the data link control layer (DLC). ) And OSI layer 3 (30) representing all network layers.

Here, the physical layer (PHL) of the DECT is for dividing a given radio spectrum into physical channels. This split occurs in two areas: time and frequency. The division of frequency and time uses time division multiple access (TDMA) operation for multiple wireless carriers. For example, in the conventional DECT, 10 carriers are provided in a frequency band between 1880-1900 MHz. DECT's Media Access Control Layer (MAC) has two main functions. First select a physical channel, and then establish and release a connection on that channel. Second, the control information is multiplexed or demultiplexed into a slot-type packet together with higher layer information and error control information.

DECT's Data Link Control Layers (DLC1, DLC2) are responsible for providing reliable data links to the Network Layer (NWK) and provide a higher level of data integration than the Media Access Control Layer (MAC) alone provides. It is closely related to the media access control layer (MAC) to provide a to the upper layer.

In Figure 1, the C-plane is common to all applications and provides a very reliable transport link of internal control signals and a limited amount of user information traffic. The U-plane, on the other hand, offers several alternative services, each of which is optimized for the specific needs of each type of service.

The network layer (NWK) of DECT is the main signal layer of the protocol. Conventional DECT employs a similar form to the ISDN Layer 3 protocol (ETS 300 102) and also provides similar functionality.

In the conventional DECT, the MAC controls the operation of creating, maintaining and releasing a bearer, and selecting an empty physical channel and evaluating the quality of a received signal by activating or deactivating a pair of physical channels.

However, since the conventional MAC has been developed to be suitable for wireless code communication that can accommodate a certain amount of data communication needs mainly on voice, many problems are expected when applied to the next generation mobile communication system. The reason is that the next generation mobile communication system is a highly compatible mobile communication device that can solve both the problems caused by the different options between the manufacturer and the operator of the communication equipment or the problems caused by the different mobile communication methods. And a system is required.

In addition, since data used in the next generation mobile communication system is multimedia information such as voice, video, and TEXT, and requires very good call quality, many optional options are required. However, the MAC of the conventional DECT provides only two functions, that is, a physical channel selection, and a function of multiplexing or demultiplexing control information into slot-type packets. Therefore, it cannot be applied as it is to the next generation mobile communication system in the future.

The present invention has been made to solve the problems caused by the prior art, an object of the present invention is to provide a mobile wireless communication service that can be compatible even if the manufacturer and the communication operator is different under different mobile communication systems It is to provide a medium access control sublayer (MAC) of a communication system and a communication control method using the same.

1 is a block diagram showing the structure of a layered protocol stack of a conventional DECT.

2 is a block diagram illustrating a protocol stack of a mobile communication system according to the present invention.

3 is a block diagram for showing the overall function of the MAC according to the present invention.

4 is a block diagram illustrating the functions of the synchronization, broadcast channel, and common channel controller 110 shown in FIG.

FIG. 5 is a block diagram illustrating a function of the dedicated channel controller 120 shown in FIG. 3.

6A to 6B are diagrams for showing a state transition of MACs of a mobile terminal and a network side according to an embodiment of the present invention.

Explanation of symbols for main parts of the drawings

100: MAC 110: synchronization, broadcast and common channel control unit

111: sync control entity 112: broadcast control entity

113: common control entity 120: dedicated channel control unit

121: dedicated control entity 122: traffic control entity

130: packet channel control unit 131: packet control entity

132: packet traffic control entity

Hereinafter, with reference to the accompanying drawings will be described in detail the configuration, operation and effects of the present invention.

2 is a block diagram illustrating a protocol stack of a mobile communication system according to the present invention.

2, a protocol stack of a mobile communication system according to the present invention includes a physical layer (PHL) as a first layer, a MAC and a link access control sub-layer (LAC) as a second layer, And a third layer including an MM-T entity (hereinafter referred to as MM), an RBC entity (hereinafter referred to as RBC), and an RRC entity (hereinafter referred to as RRC)).

In the protocol stack of the mobile communication system according to the present invention configured as described above, the functions of the MAC may be classified into basic functions performed by the MAC itself and related functions performed by transferring them with the upper and lower layers.

3 is a block diagram illustrating the overall function of the MAC 100 according to the present invention.

Referring to FIG. 3, the structure of the MAC 100 according to the present invention transmits information for synchronizing with a plurality of mobile terminals in a network, sets a dedicated control channel between the network and the mobile terminal, and sets the control channel. Connection-Oriented Point-type connection to the upper layer of the synchronization, broadcasting and shared channel control unit 110, and the synchronization, broadcasting and shared channel control unit 110 for performing call setup between the network and the mobile terminal. to-Point) as a bidirectional operating system between the network and the mobile terminal, and dedicated channel controller 120 for performing quality monitoring of the wireless link formed between the network and the mobile terminal, and synchronization, broadcasting and shared channels. A packet channel system which provides a connection-oriented point-to-point service to the upper layer of the control unit 110 as a bidirectional operating system between the network and the mobile terminal and provides packet data service. It consists of 130.

Type of channel provided to MAC

The channel provided to the MAC according to the present invention having such a configuration can be largely divided into a common control channel group and a dedicated channel control group.

The common channel control group has a type of logical channel, which is composed of a synchronization channel, a channel, a broadcast control channel, and a common control channel.

The Synchronization Channel (SCH) includes a system time for time information, and includes base information for network identification information such as a network.

The Broadcasting Control Channel (BCCH) broadcasts general system information. The system information includes access parameter information necessary for accessing the mobile terminal network, neighbor cell information informing RF information of surrounding cells, information on available frequencies, and the like.

The common control channel (CCCH) is used to establish a dedicated signal channel (SDCCH) between the mobile terminal and the network. In an embodiment of the present invention, a common control channel is a paging channel (PCH) used for a called party, a random access channel (RACH) used by a mobile terminal to access a network, and a network. It consists of a Forward Access Channel (FACH) for responding to the access of the mobile terminal. Here, RACH and FACH are used as a pair of channels.

In addition, the dedicated control channel group is a type of logical channel, and is composed of a dedicated control channel, an associated control channel, and a traffic channel.

Stand alone Dedicated Control Channel (SDCCH) is a connected bidirectional logical channel formed between the mobile terminal and the network. All signal information from this communication channel right after the dedicated control channel is established until the communication state is transmitted using this channel. Setup of terminal association (TA), call setup, etc. can be delivered using this channel.

Associated Control Channel (ACCH) is a connected bidirectional logical channel used in conjunction with a traffic channel. All signal information after the communication state is transmitted using this channel. Power control information, handover signal information, and the like during communication can be delivered using this logical channel.

A traffic channel (TCH) is a connected bidirectional channel formed between a mobile terminal and a network, where the speed of the channel is determined by the type of service.

The MAC according to the present invention shown in FIG. 3 provides an extended function by reflecting a wireless environment in the conventional MAC function.

The synchronization, broadcast and common channel control unit 110 includes a synchronization control entity 111 for controlling a synchronization channel for broadcasting general time information and network identification information, and a broadcasting control entity for controlling a broadcast channel for broadcasting general system information. And a common control entity 113 for establishing and controlling a dedicated signal channel (SDCCH) between the network and the mobile terminal.

The dedicated channel control unit 120 controls a dedicated control entity 121 for controlling a connected bidirectional dedicated control channel formed between the mobile terminal and the network, and controls a connected bidirectional traffic channel formed between the mobile terminal and the network, and controls a single or multiple bearer. It consists of a traffic control entity 122 to support a control function (user plane).

Here, each control entity accesses a higher layer including the LAC through three service access points (SAPs). MAC_SAPI (= 0) is the service access point for the synchronization control entity (SCE), broadcast control entity (BCE) and the common control entity (CCE), and MAC_SAPI (= 1) is the service access point for the dedicated control entity (DCE). to be. MAC_SAPI (= 2) is the service access point for the system management entity in the management plane. Each service access point includes one or more independent connection endpoints.

Hereinafter, the functions of the synchronization, broadcast and common channel controller 110 and the functions of the broadcast control entity 111, the broadcast control entity 112, and the common control entity 113 will be described with reference to FIG. 4.

The synchronization and broadcast control entity 111 provides a point-to-multipoint service for a network to transmit to multiple mobile terminal stations for system time information, network identification information, and system information. Synchronous and broadcast control can be continuous or periodic (Store and forward) method, and general system information, access parameter information necessary for mobile terminal to access network, neighbor cell information to inform surrounding cell RF information, available Contains information about the frequency.

The broadcast control entity 112 splits and recombines the LAC frame according to the frame length of the broadcast control channel (BCCH) and frames or reverses the frame according to a predetermined frame format.

The common control entity 113 is used for mobile terminal and network access and provides a random access control function. In this case, the random access control function sets a signal channel (SDCCH) dedicated to the mobile terminal to enable point-to-point connection between the mobile terminal and the network using a common control channel. The terminal accesses the network using this control channel to perform call setup.

Hereinafter, the functions of the dedicated control entity 121 and the traffic control entity 122 of the dedicated channel controller 120 will be described with reference to FIG. 5.

The dedicated control entity 121 provides a connection-oriented point-to-point service to a higher layer. Connected point-to-point services operate as a two-way operating system between the mobile terminal and the network. The network simultaneously controls a plurality of dedicated channels, and the mobile terminal controls a single dedicated channel.

The traffic control entity 122 supports the power control of the physical channel in order to maintain the quality of the traffic frame (FER), and the quality and the pilot strength of the traffic frame are constant. Falling below it will trigger a handover. Quality monitoring on the wireless link can be measured by the mobile station and reported to the network using the ACCH.

In addition, in the case of a multi-bearer connection for a large capacity service, the MAC may control a plurality of traffic channels. That is, in the case of a (multimedia) service call requiring a plurality of codes, the sequencing function of the multiple codes may be performed using a mechanism for QoS negotiation and dynamic bandwidth allocation. However, resource management, allocation and status management of multiple codes are performed in the network and the results are transmitted to the mobile terminal using a message.

Overall function operation of MAC

Hereinafter, the overall function of the MAC according to an embodiment of the present invention will be described.

First, the unique functions of MAC include random access control information transfer function, control information transfer function, user information transfer function, framing & deframing, MAC frame formation function, segmentation and reassembly function. In addition, a function of dividing a LAC frame into physical channels and its reverse function, a CRC investigation function, an error detection function of a MAC frame, and a rate adaptation (padding) function of adjusting the number of bits according to a radio frame are provided.

In addition, related functions of the MAC, the control function of the Sync Information, the control function of the System Information, Act- / Deactivation of physical channels

Quality Monitoring and Reporting function, that is, power control support, handover triggering, or channel environment reporting (ffs) at the time of traffic channel to maintain the quality (FER) of the traffic channel, and multi-code sequencing in order Multi-bearer sequencing function is provided.

6A to 6B are diagrams for showing a state transition of a MAC of a mobile terminal and a network side according to an embodiment of the present invention.

Referring to FIG. 6A, a null state indicates a state in which communication with a network is impossible, a wait state for synchronization information indicates a state waiting for receiving sync information, and an idle state for an incoming / outgoing call of a mobile terminal. The SDCCH can be set, and the Wait for Access ACK state requests random access and waits for confirmation, and the Wait for Access Response is for random access confirmation. The SDCCH Wait for Active indicates a state waiting for the SDCCH to be activated. The SDCCH or Radio Bearer Active indicates that the DCCH or Radio Bearer is activated to transmit information using the same. Respectively.

Referring to FIG. 6B, an idle state indicates a state in which an SDCCH can be set for incoming and outgoing calls on a network, and indicates an SDCCH wait for radio resource, and receives a request for setting an SDCCH from a mobile terminal. It indicates to the LAC that it is waiting for a response, and the SDCCH Wait for Active state indicates that the SDCCH is waiting to be activated, and SDCCH or Radio Bearer Active indicates that the SDCCH or radio bearer is activated. It indicates the state where the used information transmission is possible.

Hereinafter, a communication protocol between a mobile terminal and a network using a MAC according to an embodiment of the present invention will be described with reference to FIGS. 6A to 6B.

Each MAC of the mobile terminal or the network side performs an initialization procedure, an idle mode procedure, and an activation procedure in association with the upper layer protocols (MM, RBC, RRC, LAC) and the physical layer of the MAC. Here, the activation procedure consists of a radio resource allocation procedure, a radio resource activation mode procedure, and a radio link failure processing procedure.

Initialization procedure of mobile terminal and network

When the power is supplied in the idle state, the state transitions to Wait for Sync Info. After that, the MAC of the mobile station starts a preset timer and monitors the synchronization channel (SCH) to obtain network identification information (Base Info) and time information for demodulation.

It is determined whether a valid sync information message (SYNC INFO) has been received until the timer expires. At this time, if the synchronization information message (SYNC INFO) is not received, the MAC transfers the cause of the synchronization acquisition failure to the upper layer (RRC) of the MAC to MMAC_RADIO_FAIL_IND and transitions to the idle state.

However, upon receiving a valid sync channel message, the MAC outputs a command to stop the timer, and delivers time information (system time) and network identification information (base info) included in the sync channel message to the physical layer as PHY_SYNC_REQ. Set the system time of the mobile terminal.

On the other hand, since the initialization mode operation of the network side may be variously implemented according to the development environment, the embodiment is not described separately. However, the period of the SYNC INFO message continuously broadcast through the synchronization channel (SCH) in the network should be within N1 (maximum value: 1 second).

Idle mode procedure of mobile terminal and network side

First, the MAC of the mobile terminal receives a SYSTEM INFO message in an idle state, and compares the serial number of the received system information with the serial number of the system information stored in the mobile terminal. At this time, if the serial number of the received system information and the serial number of the system information stored in the mobile terminal are different from each other, the system information is regarded as changed and updated with the recently received system information. In this case, the MAC of the mobile terminal should not communicate with the network in any form until the system information is updated.

On the other hand, the network periodically broadcasts the SYSTEM INFO message through the broadcast channel BCCH in the idle state SN1 (SN2). The broadcast period should be within N2 (maximum value: 1 second). The mobile terminal uses the received SYSTEM INFO message to get the information needed to connect to the currently monitored network. In this case, the SYSTEM INFO message includes information on the current network, control information on access channel usage, control information on neighboring networks, and CDMA channel list information.

Radio resource allocation procedure of mobile terminal and network side

The radio resource allocation procedure is used for radio access between the mobile station and the network, and is generated in response to the radio resource allocation request (MAC_ACC_REQ) of the upper layer (LAC) of the MAC. The MAC_ACC_REQ primitive is used by the MAC to request allocation of radio resources (signal channel or traffic channel) used for originating call and location registration. Herein, the radio resource refers to a radio channel set as point-to-point between the mobile terminal and the network, and includes a signal channel (SDCCH) and a traffic channel (TCH).

First, the radio resource allocation procedure of the mobile station should check whether the radio resource of the network is allowed. That is, the SYSTEM INFO message broadcast through the broadcast channel BCCH may include an authorized access level. Then, a radio resource allocation procedure is started. That is, when the MAC of the mobile station receives the MAC_ACC_REQ primitive from the LAC, it sends a CHANNEL REQUEST message to the network in response. The transmission of the CHANNEL REQUEST message is performed according to the random access procedure, and the power control of the access channel indicates the transmit power level to the physical layer according to the SYSTEM INFO message broadcast through the broadcast channel (BCCH).

The random access procedure at this time is as follows. The mobile station attempts a random access procedure through an access channel to be allocated a dedicated signal channel. The parameters used in the random access procedure use an establishment cause indicating a situation of random access, a random reference, which is a random number generated by the mobile terminal itself, and a PAGING CH NUM that distinguishes a paging channel and a PAGING SLOT NUM that distinguishes a paging slot.

Subsequently, the verification procedure is performed after the radio resource allocation procedure is completed. The verification procedure is necessary for the reliable exchange of messages between the mobile terminal and the network. When a mobile station sends a CHANNEL REQUEST message using a random access procedure and receives a CHANNEL RESPONSE message from the network, the mobile station assumes that the verification procedure has been performed successfully and sends a MAC_ACC_CNF primitive to the LAC. The mobile terminal does not start a new access attempt until the previous access attempt is completed.

When the mobile station receives the CHANNEL RESPONSE message and the radio resource is set, the RRC of the mobile station sends an MMAC_ACT_REQ primitive to the MAC, and the MAC instructs the physical layer to activate the radio resource (PHY_ACT_REQ) and upon receiving the response (PHY_ACT_CNF). , RRC informs that the radio resource is set (MMAC_ACT_CNF).

On the other hand, the radio resource allocation procedure of the network is as follows.

When the MAC of the network receives a CHANNEL REQUEST message from the mobile terminal, it immediately responds with a CHANNEL REQUEST ACK message to stop the random access attempt of the mobile terminal, and the network allocates the radio resource requested by the mobile terminal, and then the CHANNEL RESPONSE message to the mobile terminal. Send to The CHANNEL RESPONSE message is information on radio resource allocation and includes an assigned frequency (Assigned_Frequency) and a channel assignment description (Channel_ Description).

The MAC of the network transmits the information about the allocated radio resource to the physical layer so that the physical channel is activated (PHY_ACT_REQ). Thereafter, signaling procedures necessary for access control and call control are performed in call control. However, the activation time point for the radio resource is a local issue, so it may be different depending on the development strategy of the operator and developer.

The network terminates the radio resource allocation procedure when the radio resource is established. The MAC of the network instructs the physical layer to activate the corresponding radio resource (PHY_ACT_REQ), and upon receiving the response from the physical layer, informs the RRC that the radio resource has been set (MMAC_ACT_CNF).

Radio resource activation mode procedure between mobile terminal and network

1. Handover Trigger Procedure

Mobile terminals and networks are situations in which the physical layer has to handover itself.

Notify the MAC with the PHY_HO_TRIGGER_IND primitive, and the MAC sends the MMAC_HO_TRIGGER_IND to the RRC.

2. Wireless environment measurement procedure

The physical layer of the mobile station informs the MAC of the PHY_MEASURE_IND primitive that it needs to measure the cell environment and the channel environment on its own, and the MAC sends MMAC_MEASURE_IND to the RRC.

3. Cell environmental measurement requirements

When the mobile station receives a cell condition report request from the network, the RRC sends MMAC_MEASURE_REQ to the MAC, sends PHY_MEASURE_REQ to the physical layer to measure the cell environment, and the MAC receives the PHY_MEASURE_CNF response from the physical layer.

4. Channel Environment Measurement Requirements

When the mobile station receives a channel condition report request from the network, the RRC sends MMAC_MEASURE_REQ to the MAC, sends PHY_MEASURE_REQ to the physical layer to measure the channel environment, and the MAC receives the PHY_MEASURE_CNF response from the physical layer.

5. Encryption Processing Requirements

The mobile terminal and the network send MMAC_CIPHER_REQ to the MAC from the MM, the MAC sends PHY_ CIPHER_REQ to the physical layer for encryption, and the MAC receives the PHY_MEASURE_CNF response from the physical layer.

6. Handover Process

The mobile terminal and the network send MMAC_HO_REQ to the MAC from the RBC, the MAC sends PHY_HO_REQ to the physical layer for handover, and the MAC receives the PHY_HO_CNF response from the physical layer.

7. Radio Resource Change Procedure

This procedure changes the attributes of the radio resource being used to a new service type (service, baud rate, etc.).

When the MAC receives a change request for radio resources (signal channel and traffic channel) from the RBC through MMAC_MODIFY_REQ, the mobile station and the network perform the following operation according to the next operation mode.

Activates a radio resource according to a new service included in MMAC_MODIFY_REQ.

The activation and deactivation of radio resources is performed between the MAC and the physical layer of the mobile terminal using the PHY_MODIFY_REQ / PHY_MODIFY_CNF primitive. The MAC of the mobile station instructs the physical layer to change the attribute of the radio resource and receives the response from the physical layer.

The activation of radio resources on the network side is performed locally in the network device, so it follows the implementation strategy of the developer. The radio resource deactivation procedure on the network side depends on the developer's implementation strategy.

8.Wireless link failure handling procedure

The mobile terminal and the network send PHY_RADIO_FAIL_IND to the MAC when the radio link fails before transitioning from the active state (MT20, N20) to another state, and the MAC sends MMAC_RADIO_FAIL_IND to the RRC / RBC. It should be released and transition to Idle (MT10, N10) state.

As described above, according to the present invention, a random access control information transfer function, a control information transfer function, a user information transfer function, a framing & deframing, a MAC frame using a MAC Formation function, segmentation and reassembly function, segmentation of LAC frame into physical channel and its reverse function, CRC investigation function, error detection function of MAC frame, rate adaptation (Padding) function and MAC to adjust the number of bits according to radio frame The related functions of Multi-Bearer perform the control function of Sync Information, control system information, Act- / Deactivation of physical channels Quality Monitoring and Reporting, and Multi-Code Sequencing The sequencing function can be realized.

Therefore, using a medium access control sublayer (MAC) according to the present invention and a communication control method using the same, a next-generation multimedia device may provide a compatible wireless mobile communication service even if a manufacturer and a communication operator are different under different mobile communication systems. It can be very useful in communication environment.

Claims (14)

Sending information for synchronization from one calling party to a plurality of called parties, setting up a dedicated control channel between the calling party and the called party, and using this control channel to perform call setup between the calling party and the called party. A first channel controller, A connection-oriented point-to-point service is provided to an upper layer of the first channel controller as a bidirectional operating system between the calling party and the called party, and the wireless link formed between the calling party and the called party. A structure of a medium access control sublayer of a mobile communication system, characterized by comprising a second channel control unit for performing quality monitoring. The apparatus of claim 1, wherein the first channel control unit is a synchronization control entity for controlling a synchronization channel for broadcasting general time information and network or base station identification information, and a broadcast control entity for controlling a broadcasting channel for broadcasting general system information. And a common control entity for establishing and controlling the dedicated signal channel (SDCCH) between the calling party and the called party. 3. The apparatus of claim 2, wherein the common control entity is a call control entity for controlling a call channel used for a call of the called party and a random access control for controlling a random access channel for the caller to access a called party. The structure of the medium access control sublayer of the mobile communication system, characterized in that the entity and the response control channel for controlling the response control channel for responding to the access from the calling party to the called party. 2. The method of claim 1, wherein the second channel control unit is a dedicated control entity for controlling a connected bidirectional dedicated control channel formed between the calling party and the called party, and a connected bidirectional traffic channel formed between the calling party and the called party. The structure of the medium access control sublayer of the mobile communication system, characterized in that the traffic channel control unit for controlling the. 5. The structure of the medium access control sublayer of the mobile communication system according to claim 4, wherein the traffic control entity can vary the speed of the traffic channel according to a preset service type. The structure of a medium access control sublayer of a mobile communication system according to claim 1, wherein the first to second channel controllers access a higher layer through a service access point (SAP). 7. The structure of claim 6, wherein each service access point comprises one or more independent connection endpoints. Matching the called party's synchronization to the calling party; Updating system information of the called party, and the calling party periodically broadcasts a system information message in an idle state; Allocating a wireless channel set as point-to-point for a wireless connection between the calling party and the called party; And activating the assigned radio channel to execute a preset communication control operation. 10. The method of claim 8, wherein when the called party is a mobile terminal, and the calling party is a network that transmits system information through a synchronization channel, the mobile station transitions to a standby state of synchronization information when power is supplied to the mobile station. Monitoring the synchronization channel after starting a timer of a predetermined period; stopping the timer when receiving a valid synchronization channel message and using the synchronization-related information included in the synchronization channel message. A communication control method using a medium access control sublayer of a mobile communication system, characterized by setting a time. The mobile communication system according to claim 8, wherein the updating of the system information of the called party is performed when the serial numbers of newly received system information and the serial numbers of currently stored system information are compared with each other. A communication control method using a medium access control sublayer. The system information message of claim 8, wherein the system information message includes at least one of information on a current network, control information on access channel usage, control information on a neighboring network, and CDMA channel list information. A communication control method using a medium access control sublayer of a mobile communication system. The method of claim 8, wherein the radio channel assignment process Determining whether a wireless channel of the calling party is allowed; If a radio channel is allowed, transmitting a radio channel request message to the calling party in response to a request for a radio channel by an upper layer of the medium access control sublayer; When the called party receives the channel response message and the radio resource is set, the called party instructs the corresponding radio channel to be activated according to the activation control command of the upper layer of the called party. Communication control method using a medium access control sublayer of a mobile communication system, characterized in that consisting of a step of notifying. 13. The method of claim 12, wherein transmitting the radio channel request message A communication control method using a medium access control sublayer of a mobile communication system, characterized in that performed according to a random access procedure. The communication control operation of claim 8, wherein the communication control operation selectively performs handover triggering, radio environment measurement, cell environment measurement, channel environment measurement, encryption processing, handover processing, radio channel change, and radio link failure processing. A communication control method using a medium access control sublayer of a mobile communication system.