KR20000065673A - Method for operating communication in Next-generation Mobile Communication System - Google Patents

Abstract

PURPOSE: A method for operating communication in the IMT-2000 relates to a method to operate the communication of an RRC(Radio Resource Control layer) in a telecommunication system suitable to support a universal mobile telecommunication system. CONSTITUTION: An RRC(10) is formed between an upper layer, such as a call control entity, a mobility management entity, a radio resource management entity, etc., and a lower layer composed of a physical layer(40), a medium access control layer(30) and an RLC(Radio Link Control layer)(200). The RRC(10) is composed of a BCE(Broadcast Control Entity)(11), a PNCE(Paging and Notification Control Entity)(12), a DCE(Dedicated Control Entity)(13) and a TME(Transfer Mode Entity)(14). The BCE(11) controls broadcast information provided from an access stratum or a non access stratum. The PNCE(12) provides paging and notification information by the upper layer. The DCE(13) provides a setup/release service for the connection and transmission of an upper layer message. The TME(14) maps the BCE(11), the PNCE(12) and the DCE(13) with an access point of an RLC(Radio Link Control layer)(200).

Description

Method for operating communication in Next-generation Mobile Communication System

The present invention relates to a next-generation mobile communication system, and more particularly, to a protocol of a radio access standard based on UMTS, which is being researched and developed and standardized by the European Telecommunications Standardization Association (ETSI), and a method of operating a communication accordingly.

Today, as society develops into a highly information society, a communication network is developing into a structured wireless structure capable of handling all services.

Mobile communication has been growing rapidly as a new field of communication so far, but most of the services were voice-oriented communication and only available in certain areas, but future mobile communication can transmit not only voice but also text, images and multimedia information, and also complete international roaming. This will enable communication from anywhere in the world.

Especially in Europe, UMTS has been centered around the European Telecommunication Standardization Association (ETSI) since the joint development of the DCS-1800 system, which serves the second generation mobile communication system called the Global System for Mobile Communications (GSM) in the 1800 MHz band. Is under development.

UMTS is a next-generation mobile communication plan based on Code Division Tested (CODIT) and Asynchronous Time Division Multiplexing Access (ATDMA). The project is being implemented as part of a project in RACE (Research and Development in Advanced Communications Technology in Europe).

UMTS's proposed radio access standard protocol structure is basically from the bottom to the physical layer (PHY), medium access control layer (MAC), radio link control layer (RLC) Layer) and Radio Resource Control Layer (RRC), and also has a higher layer.

However, these protocol layers continue to be studied to realize service performance of next generation mobile communication.

That is, the selection of a protocol structure suitable for the wireless access standard according to objective criteria such as spectrum efficiency, service range, and power efficiency, and subjective criteria such as system complexity, service quality, wireless technology flexibility, network interoperability, and portable performance will continue. It is a required situation.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned matters, and it is a radio of a next generation mobile communication system including an RRC that performs a radio resource control function according to the characteristics of data resources to support a variety of mobile communication services developed in the future. It is to provide a communication operation method of the resource control layer.

According to a feature of the present invention for achieving the above object, the step of identifying the characteristics of the input message, processing the input message using one of a plurality of signal processing procedures according to the characteristics of the input message, the processing Determine a transmission mode of the input message and determine an output path of the input message according to the transmission mode

Preferably, the characteristics of the input message may be classified into a broadcast message, a call message or a notification message, or a message such as a packet or a voice according to a service and a function provided.

Preferably, the divided and signal-processed messages in each RRC entity are each RLC service access point (hereinafter, abbreviated as SAP) according to their transmission mode characteristics (T-SAP, UNACK-SAP and ACK-). SAP).

According to the present invention as described above, it is possible to support the communication service of the Universal Mobile Telecommunications System (UMTS), which is being researched and developed and standardized by the European Telecommunications Standardization Association (ETSI).

1 is a block diagram showing a detailed configuration of a radio resource control layer (RRC) of a UTRAN in a next generation mobile communication system according to the present invention.

2 is a block diagram illustrating a detailed configuration of a radio resource control layer (RRC) of a user entity (UE) in a next generation mobile communication system according to the present invention.

3 is a block diagram illustrating a detailed configuration of a radio protocol structure and a radio link control layer (RLC) of a user entity (UE) in a next generation mobile communication system according to the present invention.

4 is a block diagram showing a detailed configuration of a radio protocol structure and a radio link control layer (RLC) of UTRAN in a next generation mobile communication system according to the present invention.

* Description of the symbols for the main parts of the drawings *

10,50: radio resource control layer (RRC) 11,51: broadcast control entity (BCE)

12,52 call and notification control entity (PNCE) 13,53 dedicated control entity (DCE)

14,54: transmission mode entity (TME)

100,200 radio link control layer (RLC)

30,70 Medium Access Control Layer (MAC) 40,80 Physical Layer (PHY)

Before describing the present invention, in a wireless protocol structure of a next-generation mobile communication system, a MAC switches multiple transport logical channels according to a result of monitoring channel conditions. Channels). In other words, it is responsible for separating the transport channel and the logical channel.

In addition, frequency division duplexing (FDD) and time division duplexing (TDD) may be selected as a transmission / reception scheme of a next generation mobile communication system. Frequency division duplexing (FDD) is supported, and in some cases, time division duplexing (TDD) may be supported.

Hereinafter, a preferred embodiment of a wireless protocol of a next generation mobile communication system according to the present invention will be described with reference to the accompanying drawings.

1 is a block diagram showing the detailed configuration of the radio resource control layer (RRC) of the Universal Terrestrial Radio Access Network (UTRAN) in the next generation mobile communication system according to the present invention, Figure 2 is a next generation according to the present invention A block diagram showing a detailed configuration of a radio resource control layer (RRC) of a user entity (UE) in a mobile communication system.

The radio resource control layer configuration implements a radio resource control (RRC) layer model in terms of supporting a universal mobile communication system (UMTS) control plane and a frequency division duplex (FDD) mode. Also used to support Time Division Duplex (TDD) mode.

The radio resource control layer (hereinafter, referred to as RRC) 10 in the present invention communication system is to be applied to the next generation mobile communication system, radio transmission control, radio resource control and mobile station (mobile station) Higher layers such as a call control entity (CC), a mobility management entity (MM), a radio resource management entity, and a packet management entity that perform management; upper layer), physical layer (PHY) 40, medium access control layer (hereinafter referred to as MAC) 30, and radio link control layer (hereinafter referred to as "MAC"). It is composed of a lower layer consisting of RLC (200).

Here, the RRC 10 controls broadcast information provided from an access layer (AS) or a non-access layer (NAS) (hereinafter, referred to as an upper layer) on the user side. Connection of a Broadcast Control Entity (BCE) 11, a Paging and Notification Control Entity (PNCE) 12 that provides call and notification information by a higher layer, and a higher layer message. And a Dedicated Control Entity (DCE) 13 which services on / off for transmission and the broadcast control entity 11, the call and notification control entity 12, and the dedicated control entity 13. It is composed of a Transfer Mode Entity (TME) 14 which maps (transmit path determination) to an access point of the RLC layer.

The radio resource control method at the network side of the radio resource control layer of the present invention having such a configuration is as follows.

The present invention distinguishes an entity that processes each message according to a message to be transmitted between an upper layer or a lower layer during communication operation from the upper layer to the lower layer RLC 200 or communication operation from the RLC 200 to the upper layer. It is.

First, the upper layer grasps the characteristics of the message to be transmitted to the RRC layer.

At this time, the characteristics of the message to be transmitted to the RRC layer are simply determined as broadcast message information, call and notification information, and setting / release information for connection and transmission of higher layer messages.

As a result of the determination, the broadcast message information is transmitted to the broadcast control entity (BCE) 11 of the RRC 10, and the call and notification information is called a paging and notification control entity (PNCE) (2). ), And the setting / release information for connection and transmission of a higher layer message is transmitted to a Dedicated Control Entity (DCE) 13.

The message input to the RRC 10 is processed by one of the above three message processing procedures according to its service and function.

That is, in the present invention RRC 10, the broadcast control entity 11 processes a message that requires only transmission, such as a simple broadcast, and the call message or notification message, etc., are called and the notification control entity 12. Service is handled by the service manager, and important messages such as packets or voices are serviced by the dedicated control entity 13.

Here, the transmission mode entity 14 determines the transmission mode of the input message processed by the set signal processing procedure and determines, i.e., mapping the output path of the input message according to the characteristics of the message and the transmission mode.

That is, the transmission mode entity 14 is a service access point of the RLC 200 in the broadcast control entity 11, the call and notification control entity 12, and the dedicated control entity 13 of the RRC 10. , And abbreviated as SAP) (T-SAP, UNACK-SAP and ACK-SAP).

At this time, by first comparing the type of the transmitted message with the current service type, the broadcast control entity 11 transmits a transparent service access point (hereinafter referred to as T-SAP) or an unacknowledged service access point (Unacknowledge-SAP). (Hereinafter abbreviated as UNACK-SAP), the call and notification control entity 12 is also mapped to T-SAP or UNACK-SAP, and the dedicated control entity 13 is T-SAP, UNACK-SAP or confirmation. Map to an access point (Acknowledge-SAP: hereinafter abbreviated as ACK-SAP).

In this case, the broadcast control entity 11 may be configured to demultiplex the upper layer message received by another higher layer entity (eg, a mobility management (MM) entity on the user side) from a peer entity, respectively. The multiplexing of higher layer messages is controlled by the RLC 200 sub-entity of the (eg, broadcast control entity (BCE) in UTRAN) itself.

The broadcast control entity 11 supports higher layer services by General Control-Service Access Points (hereinafter referred to as GC-SAPs) and is provided by lower layers provided by T-SAP or UNACK-SAP. (RLC 200) service can be used. At this time, the T-SAP transmits the message transmitted from the upper layer to the RLC 200, and the UNACK-SAP does not require confirmation of the transmitted message.

The call and notification control entity 12 then demultiplexes the higher layer messages received by other higher layer entities (e.g., mobility management (MM) entities on the user entity (UE) side) from the peer entity. ) And the multiplexing of higher layer messages at each RRC 10 sub-entity (eg, call control and notification entity (PNCE) in UTRAN) itself.

The call and notification control entity 12 supports higher layer services by Notification Service Access Points (hereinafter referred to as NT-SAPs), and the lower layer provided by T-SAP or UNACK-SAP ( RLC 200) service can be used.

The dedicated control entity 13 demultiplexes the upper layer messages received by other higher layer entities (e.g., mobile management (MM) entities in the user entity and RANAP in the network (UTRAN)) from peer entities. (demultiplexing) and multiplexing of higher layer messages at each RRC 10 sub-entity (e.g., dedicated control entity (DCE) at the user entity (UE) and the UTRAN side) itself. .

The dedicated control entity 13 supports higher layer services by dedicated control service access points (hereinafter referred to as DC-SAPs), T-SAP or ACK-SAP) or UNACK-SAP). It is possible to use a lower layer (RLC 200) service provided by. At this time, the ACK-SAP transmits a message from the upper layer to the lower layer (RLC 200) and requests confirmation of message transmission to confirm the message transmission to the upper layer.

As shown in FIG. 2, when the RRC usage state of the user entity (UE) is input to the RLC 100 of the lower layer, the RLC 100 grasps the characteristics of the input message and according to the characteristics, the T-SAP, The message is sent to the transport mode entity 14 of the RRC 10 via UNACK-SAP or ACK-SAP.

In the transmission mode entity 14, when a message is transmitted in T-SAP, UNACK-SAP or ACK-SAP of the RLC 100, the broadcast control entity 11, call and notification control according to the service and function provided by the message. To either the entity 12 or the dedicated control entity 13.

That is, it is transmitted to each entity 11, 12, 13 depending on whether it is a broadcast message, a call and notification message, or a message such as voice or packet.

Then, the broadcast control entity 11, the call and notification control entity 12 and the dedicated control entity 13 process signal processing procedures according to the characteristics of each entity, and the GC-SAPs, NT- of the RRC 10 are processed. Transfer to higher layers via SAPs and DC-SAPs.

3 and 4 are diagrams illustrating a radio protocol structure of a next generation mobile communication system according to the present invention.

3 is a block diagram illustrating a radio protocol structure of a user entity (UE) in a next generation mobile communication system according to the present invention, and FIG. 4 is a diagram showing a radio protocol structure of UTRAN in a next generation mobile communication system according to the present invention. It is a block diagram.

Since the description of the radio protocol structure of UTRAN shown in FIG. 4 is almost identical to the description of the radio protocol structure of the user entity UE of FIG. 3, the present invention will be described below with reference to FIG. 3. .

In FIG. 3, the RLC 100 has different Service Access Points (SAPs) to access the upper layer. This RLC-SAP is T-SAP, UNACK-SAP, ACK-SAP

"RLC control" between the upper layer and the RLC 100 is to provide a report to the upper layer or to provide processing control of the RLC 100 itself, which will be described in more detail below.

Here, each of the entities 110, 120, and 130 of the RLC 100 is divided according to the type and function of the data transfer mode.

RLC-Transparent (hereinafter referred to as RLC-T) entity 110 controls data flow for logical channels such as SCCH, BCCH, PCCH and DTCH via logical channel SAP connected to MAC. .

The RLC-T entity 110 has a segmentation block 111 and a transmit buffer block 112 on the uplink to UTRAN, which will be described later. UTRAN) also has a segmentation block 211 and a transmitter buffer block 212 on the downlink to the user entity (UE).

In addition, the RLC-T entity 110 has a reassembly block 113 and a receive buffer block 114 on the downlink from the UTRAN and the UTRAN of FIG. 4. ) Also has a reassembly block 213 and a receive buffer block 214 on the uplink from the user entity UE.

At this time, in view of the user entity (UE) in the transmission side, the RLC-T entity 110 receives a service data unit (hereinafter, abbreviated as SDU) from the upper layer.

Subsequently, the division block 111 of the RLC-T entity 110 divides the received SDU into a plurality of protocol data units (hereinafter, referred to as PDUs) without a header, and transmits a transmission buffer block ( 112) to the MAC.

Conversely, in terms of the user entity (UE) being the receiving side, the RLC-T entity 110 receives the PDUs from the MAC via the receive buffer block 114.

Thereafter, the reassembly block 113 of the RLC-T entity 110 reassembles the received PDUs into SDUs and delivers them to an upper layer.

RLC-Unacknowledged (hereinafter abbreviated as RLC-UNACK) entity 120, through logical channel SAP connected with MAC, for logical channels such as SCCH, BCCH, PCCH, CCCH, DCCH and DTCH. Control data flow.

The RLC-UNACK entity 120 is a segmentation & concatenation 121, a framing block 122, and a transmit buffer block 123 in the uplink to UTRAN. UTRAN in FIG. 4 also divides and concatenates 221, framing 222, and transmit buffer blocks in the downlink to the user entity UE. 223.

In addition, the RLC-UNACK entity 120 includes a reassembly block 124, a duplicate detection block 125, and an error detection block 126 in the downlink from the UTRAN. And a deframing block 127 and a receive buffer block 128, the UTRAN of FIG. 4 also reassembles in the uplink from the user entity UE. 224, a duplication detection block 225, an error detection block 226, a deframing block 227, and a receive buffer block 228.

At this time, in view of the user entity (UE) transmitting side, the RLC-UNACK entity 120 receives the SDU from the upper layer.

Thereafter, the RLC-UNACK entity 120 divides the received SDU into a plurality of PDUs having a header by framing, and transmits the SDU to the MAC through the transmission buffer block 123.

Here, when the received SDU is divided into PDUs, concatenation is simultaneously performed to be divided into appropriate PDUs. Concatenation is a procedure of inserting a part of the next data into a free space (PAD) of the PDU.

Conversely, in terms of the user entity (UE) receiving side, the RLC-UNACK entity 120 receives the PDUs from the MAC through the receive buffer block 128.

The header is then separated from the PDUs received by the deframing block 127 of the RLC-UNACK entity 120 and then detected whether there is an error in each PDU.

At this time, if an error is detected in the received PDU, the corresponding PDU is discarded, and the PDU for which no error is detected is detected again.

In this case, if a duplicate PDU is detected among the PDUs in which no error is detected after the error detection, the corresponding PDU is transmitted only once to the reassembly block 124.

The reassembly block 124 then reassembles the delivered PDUs into SDUs and delivers them to their higher layers.

RLC-Acknowledged (hereinafter abbreviated as RLC-ACK) entity 130 controls the data flow for logical channels such as DCCH and DTCH via logical channel SAP connected with MAC.

The RLC-ACK entity 130 includes a segmentation & concatenation 131, a framing block 132, and a flow control block 133 in the uplink to UTRAN. And an error correction & retransmission block 134 and a transmitter buffer 135, the UTRAN of FIG. 4 also having the same block in the downlink to the user entity UE. (231-235).

In addition, the RLC-ACK entity 130 may include an in-sequence delivery of upper layer PDU 136, a reassembly block 137, and a flow control block in a downlink from a UTRAN. (Flow control) 138, Duplication detection block 139, error correction block 140, error detection block 141, deframing block 142 And a receive buffer block 143, the UTRAN of FIG. 4 also has these same blocks 236-243 on the uplink from the user entity UE.

At this time, in view of the user entity (UE) transmitting side, the RLC-ACK entity 130 receives the SDU from the upper layer.

Thereafter, the division and concatenation block 131 of the RLC-ACK entity 130 divides the received SDU into a plurality of PDUs having a header by framing. In this case, when the received SDU is divided into PDUs, concatenation is simultaneously performed to be divided into appropriate PDUs.

Accordingly, the RLC 100 processes the transmission rate based on the flow status information of the peer RLC sent, and then the RLC 100 receives an acknowledgment from the peer RLC. Detect if yes.

Here, if it is detected that the acknowledgment is not received from each PDU, the RLC 100 must multiplex the current transmission PDU and then retransmit the corresponding PDU.

When the uplink operation of the RLC-ACK entity 130 ends, the RLC 100 transmits the corresponding PDU to the MAC through the transmission buffer 135.

Conversely, in terms of the user entity (UE) receiving side, the RLC-ACK entity 130 receives the PDUs from the MAC through the receive buffer block 128.

The header is then separated from the PDUs received by the deframing block 142 of the RLC-ACK entity 130 and then detected whether there is an error in each PDU.

At this time, if an error is detected in the received PDU, the RLC 100 requests retransmission to an unapproved RLC, and the RLC 100 then detects whether the PDU is duplicated again.

At this time, if a duplicate PDU is detected among the PDUs, the corresponding PDU is transmitted only once to the flow control block 138.

Thereafter, the RLC 100 transmits the flow state information to the same RLC, and reassembles the PDUs into the SDUs, thereby maintaining the PDU sequence to be transmitted to the higher layer.

Table 1 below lists functions according to each RLC entity 110, 120, and 130 of the user entity UE illustrated in FIG. 3.

In addition, Table 2 lists the functions according to each RLC entity 210, 220, and 230 of UTRAN shown in FIG.

In the present invention, in addition to the RLC functions described above and listed in Tables 1 and 2, the RLC 100 further has new functions.

This new RLC feature is Framing / Deframing. This is a function to control separation / combination of headers inserted into a PDU.

The RLC structure described so far relates to the type of RLC data transmission mode and the RLC function.

As described above, the present invention provides an application layer and a radio resource control layer, which are upper layers in a radio resource control layer of communication services of a universal mobile communication system (UMTS), which is being promoted research and development and standardization by the European Telecommunication Standardization Association (ETSI). Since the radio resource control between the RRC) and the lower layer radio link control (RLC) layer is efficiently performed, there is a more advantageous effect in realizing various service performances aimed at the next generation mobile communication.

Claims (3)

Identifying characteristics of the input message; Processing the input message using one of a plurality of signal processing procedures according to the characteristics of the input message; And determining a transmission mode of the processed input message, and determining an output path of the input message according to the transmission mode. The method of claim 1, wherein the characteristic of the input message is a broadcast message, a call or notification message, or a message such as a packet or a voice. The method of claim 1, wherein the transmission mode is a transmission transmission mode, an unconfirmed transmission mode, or a confirmation transmission mode.