KR101954226B1 - Base station apparatus and signal processing method in wireless communication system - Google Patents

Base station apparatus and signal processing method in wireless communication system Download PDF

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Publication number
KR101954226B1
KR101954226B1 KR1020150107567A KR20150107567A KR101954226B1 KR 101954226 B1 KR101954226 B1 KR 101954226B1 KR 1020150107567 A KR1020150107567 A KR 1020150107567A KR 20150107567 A KR20150107567 A KR 20150107567A KR 101954226 B1 KR101954226 B1 KR 101954226B1
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South Korea
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layer
radio resource
remote unit
unit
centralized
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KR1020150107567A
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Korean (ko)
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KR20160111829A (en
Inventor
이기호
김병석
김성관
이용규
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주식회사 케이티
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Priority to US15/072,513 priority Critical patent/US10206219B2/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices
    • H04W88/085—Access point devices with remote components
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/022—Site diversity; Macro-diversity
    • H04B7/024—Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2603—Arrangements for wireless physical layer control
    • H04B7/2609—Arrangements for range control, e.g. by using remote antennas
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

A base station apparatus, a resource management method, and a data processing method are disclosed. Herein, the base station equipment comprises a remote unit for transmitting and receiving radio signals to and from the terminal, a processing unit connected to the remote unit, for processing a signal received from the terminal or a signal to be transmitted to the terminal, Wherein the remote unit schedules data and resources with the terminal based on resource allocation information received from the centralized unit.

Description

TECHNICAL FIELD [0001] The present invention relates to a base station apparatus, a resource management method, and a data processing method,

The present invention relates to a base station apparatus, a resource management method, and a data processing method, and more particularly, to a base station apparatus, a resource management method, and a data processing method in a wireless communication system supporting a cloud communication center.

In order to improve the efficiency of network resources, the Cloud Communication Center (CCC) technology is attracting attention. According to the cloud communication center technology, the wireless data capacity can be greatly increased, and the operation cost and power can be reduced.

The cloud communication center technology separates the digital signal processing unit (DU) and the radio signal processing unit (RU) from the existing base station and concentrates the digital signal processing unit (DU) in a separate DU center And installs the radio signal processing unit RU remotely in the service target area, that is, the cell.

At this time, the digital signal processing unit DU performs a radio resource management (RRC), a local gateway (LGW), and a cache function. A Medium Access Control (MAC) layer, a Radio Link Control (RLC) layer, a Packet Data Convergence Protocol (PDCP) layer, a Radio Resource Control (RRC) layer Lt; RTI ID = 0.0 > a < / RTI >

The radio signal processing unit (RU) includes only an RF function and uses a physical layer (PHY) as a radio protocol layer. In the structure of such base station equipment, the digital signal processor DU manages the scheduling of the radio signal processor RU.

In this case, there are several hundreds of delays between the digital signal processing unit DU and the radio signal processing unit RU. When the digital signal processing unit DU processes the scheduling as in the conventional case, if a retransmission is required due to a channel error, The retransmission scheduling must be performed again in the processing unit DU, so that the retransmission becomes difficult immediately. This problem becomes difficult to satisfy the end-to-end delay criterion of 1 ms in the next generation system such as 5G. Also, when CPRI (Common Public Radio Interface) is used like a digital signal processing unit (DU) and a wireless signal processing unit (RU), which is a conventional base station separation structure, a very high data transmission rate And there is a problem that additional construction such as optical infrastructure is required for this.

Accordingly, the present invention has been made in view of the above problems, and it is an object of the present invention to provide a separate type structure in a separate base station equipment, which enables fast scheduling in a radio contact section to shorten an end to end delay, And to provide a next generation base station structure and a data processing method that can reduce the bandwidth required between separate base station interfaces.

According to an aspect of the present invention, a base station equipment includes a remote unit that performs wireless signal transmission / reception with a terminal, and a processing unit that is connected to the remote unit and processes a signal received from the terminal or a signal to be transmitted to the terminal And a centralized unit for transmitting resource allocation information to the remote unit,

The remote unit schedules data and resources with the terminal based on resource allocation information received from the centralized unit.

The remote unit comprises:

And a distribution-radio resource manager for performing scheduling for allocating radio resources to the mobile station based on the resource allocation information,

The convergence unit is configured to receive a radio resource allocation request and channel state information of the UE from the distribution-radio resource management unit, and transmit the resource allocation information based on the received information to the distribution-radio resource management unit The distribution-radio resource management unit and the centralized-radio resource management unit may be connected by a radio resource management interface.

One centralized unit may be connected to a plurality of remote units, and one centralized-radio resource management unit may be connected to a plurality of distribution-radio resource management units.

Wherein the distribution-radio resource management unit comprises:

(TP) between the Tx point (TP) and the Tx point (TP) based on radio resource management information received from the centralized-radio resource management section And can perform cooperative multi-point operation.

The remote unit comprises:

The distribution-radio resource management unit can be upgraded using software data received from an external device based on SDR (Software Defined Radio) technology.

The plurality of protocol layers,

The remote unit and the centralized unit may be connected by a user plane interface and a control plane interface between protocol layers.

The remote unit comprising a radio link control layer,

The convergence unit comprising a packet data convergence protocol layer,

And may be connected by a user plane interface and a control plane interface between the radio link control layer and the packet data convergence protocol layer.

The remote unit comprises:

An active antenna system, a physical layer, a medium access control layer, and a radio link control layer.

The remote unit comprises:

The active antenna system, the physical layer, the MAC layer, and the RLC layer can be installed and upgraded using software data received from an external device based on SDR (Software Defined Radio) technology.

Wherein the concentration unit comprises:

A packet data convergence protocol layer and a radio resource control layer,

The control plane data transmitting and receiving with the remote unit using the packet data convergence protocol layer can be transmitted to and received from the core system using the radio resource control layer.

Wherein the concentration unit comprises:

Using a wireless protocol layer including a packet data convergence protocol layer, a radio resource control layer, an S1 Application Part (S1AP) layer, and a general tunneling protocol layer,

The user plane data transmitting and receiving with the remote unit using the packet data convergence protocol layer can be transmitted and received to the core system connected through the S1AP interface using the general tunneling protocol layer.

The centralized unit operating on a virtualization platform,

A local gateway unit for providing a local breakout service, and a cache unit for storing data to be transmitted to the terminal.

According to another aspect of the present invention, a base station apparatus includes a remote unit that performs transmission and reception of a radio signal with a terminal, and a centralized unit that is connected to the remote unit and transmits resource allocation information to the remote unit,

The remote unit comprises:

And a plurality of protocol layers connected to the core system for scheduling data and resources with the terminal based on the resource allocation information received from the centralized unit.

The remote unit comprises:

(S1 AP) layer and a general tunneling protocol layer, wherein the radio resource control layer and the S1AP layer are connected to the core system by a control plane interface, and the general tunneling protocol layer comprises: It can be connected by a user plane interface with the core system.

The remote unit comprises:

And a distribution-radio resource manager for performing scheduling for allocating radio resources to the mobile station based on the resource allocation information,

Wherein the concentration unit comprises:

And a centralized-radio resource manager for receiving a radio resource allocation request and channel state information of the terminal from the distribution-radio resource manager and transmitting the resource allocation information based on the received information to the distribution-radio resource manager. The distribution-radio resource management unit and the centralized-radio resource management unit may be connected by a radio resource management interface.

One centralized unit is connected to a plurality of remote units,

One concentration-radio resource management unit may be connected to a plurality of distribution-radio resource management units.

Wherein the distribution-radio resource management unit comprises:

(TP) between the Tx point (TP) and the Tx point (TP) based on radio resource management information received from the centralized-radio resource management section And can perform cooperative multi-point operation.

The remote unit comprises:

A protocol layer including an active antenna system, a physical layer, a medium access control layer, a radio link control layer, a packet data convergence protocol layer, a radio resource control layer, an S1 Application Part (S1AP) layer and a general tunneling protocol layer.

The protocol layer and the distribution-radio resource manager can be upgraded using software data received from an external device based on SDR (Software Defined Radio) technology.

According to another aspect of the present invention, there is provided a resource management method for a base station equipment including a remote unit and a centralized unit, the resource management method comprising: receiving, by the centralized unit, Transmitting resource allocation information based on the radio resource allocation request and the channel status information to the remote unit, and scheduling data and resources with the terminal based on the resource allocation information .

Wherein the scheduling comprises:

And performing a cooperative multipoint operation including at least one of transmission packet synchronization, retransmission control and scheduling control between Tx points (TP) based on the resource allocation information, and optimal precoding of the Tx point (TP) have.

According to another aspect of the present invention, there is provided a data processing method for a base station apparatus including a remote unit and a centralized unit, the method comprising the steps of: processing control plane data and user plane data received by the centralized unit from a core system; Transmitting the control plane data and the user plane data to the remote unit via an interface between the remote unit and a protocol layer distributed in the centralized unit, And transmitting the control plane data and the user plane data to the terminal.

The interface between the protocol layers includes a packet data convergence protocol layer, a radio resource control layer, an S1 Application Part (S1AP) layer and a general tunneling protocol layer dispersed in the centralized unit, a radio link control layer distributed in the remote unit, The interface between the control layer and the physical layer.

According to another aspect of the present invention, a data processing method is a data processing method of a base station equipment including a remote unit and a centralized unit, wherein the remote unit connected to the centralized unit and the radio resource management interface receives control plane data And receiving user plane data, and transmitting the control plane data and the user plane data to a terminal.

Wherein the receiving comprises:

Receiving the control plane data using a radio resource control layer and an S1 AP (S1 Application Part) layer connected to the core system, and receiving the user plane data using a general tunneling protocol layer connected to the core system . ≪ / RTI >

According to the embodiment of the present invention, since the MAC layer, the RLC layer, and the RRM function included in the digital signal processing unit DU are distributed to the remote units, the scheduling is directly performed in the terminal contact area, thereby minimizing the scheduling latency can do.

1 is a diagram illustrating a configuration of a wireless communication system according to an embodiment of the present invention.
2 shows an example of a hierarchical structure of a radio interface protocol.
3 is a diagram illustrating a structure of a base station apparatus according to an embodiment of the present invention.
4 is a diagram illustrating a structure of a base station apparatus according to another embodiment of the present invention.
5 is a diagram illustrating a structure of a base station apparatus according to another embodiment of the present invention.
6 is a diagram illustrating a virtualization platform structure of a centralized unit (CU) according to an embodiment of the present invention.
7 is a flowchart illustrating a resource management method of a base station equipment according to an embodiment of the present invention.
8 is a flowchart illustrating a data processing method of a base station apparatus according to an embodiment of the present invention.
9 is a flowchart illustrating a data processing method of a base station apparatus according to another embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise.

In this specification, a terminal includes a mobile station (MS), a mobile terminal (MT), a subscriber station (SS), a portable subscriber station (PSS), a user equipment A mobile station, a mobile station, a subscriber station, a mobile subscriber station, a user equipment, an access terminal, and the like may be included in the mobile station UE, the access terminal, the AT, .

In this specification, a base station (BS) includes an access point (AP), a radio access station (RAS), a node B, an evolved Node B (eNodeB) (Access Point), a Base Transceiver Station (BTS), a Mobile Multihop Relay (MMR) -BS, .

The invention may be used with any wireless communication system (e.g., IEEE) that supports Cloud Communication Center (CCC) technology.

Hereinafter, a BS equipment, a resource management method, and a data processing method according to an embodiment of the present invention will be described in detail with reference to the drawings.

1 is a configuration diagram of a wireless communication system according to an embodiment of the present invention.

Referring to FIG. 1, a wireless communication system 1 includes a terminal 100, a base station apparatus 200, and an evolved packet core (EPC) 300.

The base station equipment 200 controls data transmission / reception for a plurality of terminals 100. The base station apparatus 200 transmits downlink scheduling information to downlink (DL) data, and transmits the downlink scheduling information to the corresponding terminal 100 in a time / frequency region, a coding, a data size, a Hybrid Automatic Repeat and ReQuest ) Related information.

In addition, the base station 200 transmits uplink scheduling information to the corresponding terminal 100 with respect to uplink (UL) data, and transmits the uplink scheduling information to the corresponding terminal 100 in a time / frequency region, HARQ related information, and the like.

The base station equipment 200 includes a Remote Active Antenna Unit (RAU) 210 and a Central Unit (CU) 230. The remote unit (RAU) 210 may be located outside the national flag, and the centralized unit (CU) 230 may be located at the national flag.

A remote unit (RAU) 210 is installed in a service area or cell site and includes a radio signal processor RU for transmitting and receiving radio signals to and from the AT 100, an active antenna system &Quot; AAS "). Here, the radio signal processing unit RU may include a frequency up conversion module, a frequency down conversion module, a power amplifier, and a filter.

The centralized unit (CU) 230 is a device that controls the remote unit (RAU) 210 and is connected to the remote unit (RAU) 210 and receives signals received from the terminal 100 or transmitted And transmits resource allocation information to a remote unit (RAU) The remote unit (RAU) 210 schedules data and resources with the terminal 100 based on the resource allocation information received from the centralized unit (CU)

2 shows an example of a hierarchical structure of a radio interface protocol.

Referring to FIG. 2, the hierarchical structure includes a physical layer (hereinafter, referred to as a PHY), a data link layer, and a network layer. This protocol layer is divided into three layers: L1 (first layer), L2 (second layer), L3 (third layer), and L3 (second layer) based on the lower three layers of the Open System Interconnection ).

The PHY layer provides an information transfer service to an upper layer using a physical channel. The PHY layer is connected to the upper layer of medium access control (MAC) layer through a transport channel. Data is transferred between the transmitting side and the receiving side physical layer through the physical channel.

The MAC layer provides a service to a radio link control (RLC) layer, which is an upper layer, through a logical channel.

The function of the RLC layer may be implemented as a functional block in the MAC layer. In this case, the RLC layer may not exist.

The Packet Data Convergence Protocol (hereinafter, referred to as 'PDCP') layer is effective in transmitting IP packets such as IPv4 (Internet Protocol version 4) and IPv6 (Internet Protocol version 6) (Header Compression) function that reduces unnecessary control information to be transmitted.

A Radio Resource Control (RRC) layer is defined only in a control plane, and includes a configuration of a radio bearer (hereinafter, referred to as 'RB'), And is responsible for controlling logical channels, transport channels and physical channels in connection with Re-configuration and Release. RB denotes a service provided by the second layer for data transmission between the UE and the network. To this end, the RRC layer exchanges RRC messages between the UE and the network. If there is an RRC connection (RRC Connected) between the RRC layer of the UE and the RRC layer of the wireless network, the UE is in the RRC Connected Mode, otherwise it is in the RRC Idle Mode.

Here, the PHY layer is the L1 layer, the MAC layer, the RLC layer, and the PDCP layer are the L2 layer and the RRC layer is the L3 layer.

The signal processing of the base station equipment 200 is performed according to the protocol layer (function or module) defined in the wireless communication system of Fig. The protocol layers required for signal processing may be distributed to the remote unit (RAU) 210 and the centralized unit (CU) 230, or may be entirely contained only in the remote unit (RAU)

3 is a diagram illustrating a structure of a base station equipment according to an embodiment of the present invention. The base station equipment corresponds to an embodiment in which a protocol layer necessary for signal processing is distributed to a remote unit (RAU) 210 and a centralized unit (CU) do.

3, a remote unit (RAU) 210 includes a Distributed Radio Resource Manager (D-RRM), a PHY layer, an AAS, a MAC layer, and an RLC layer do.

The central unit (CU) 230 is connected to a remote unit (RAU) 210 and includes a data processing unit for processing signals received from the terminal 100 or signals to be transmitted to the terminal 100. The central unit (CU) 230 is connected to the core system (EPC) 300 and transmits signals received from the terminal 100 to the core system (EPC) 300 to the terminal 100.

The CU 230 includes a Central Radio Resource Manager (C-RRM), a PDCP layer, an RRC layer, an S1 Application Part (S1AP) layer, a General Tunneling Protocol layer, a local gateway (LGW), and a cache (Cache). Such a base station equipment structure can improve the number of users by improving the number of cells (RU) per base station through RRC sharing and virtualizing call processing function.

The central unit (CU) 230 is coupled to the core system (EPC) 300 via the S1AP interface.

The C-RRM and D-RRM are connected by radio resource management (RRM) interface. Such an RRM interface can be further defined by using a new information element in the X2-AP protocol.

The C-RRM receives a radio resource allocation request and channel state information of the UE 100 from the D-RRM, and transmits resource allocation information based on the received information to the D-RRM.

The D-RRM controls the PHY layer, the MAC layer and the RLC layer based on the resource management information received from the C-RRM to perform cooperative multi-point operations, that is, joint transmission, cooperative scheduling And performs a CoMP function. That is, it performs a comp function including at least one of transmission packet synchronization, retransmission control and scheduling control, and optimal precoding of a Tx point (TP) between Tx points (TP) transmitting downlink signals to the terminal 100 do.

The MAC and RLC perform the function of allocating resources for data transmission.

By implementing the D-RRM, the PHY layer, the MAC layer, and the RLC layer in the remote unit (RAU) 210, the scheduling can be performed directly in the terminal contact area, thereby minimizing the scheduling latency.

Further, the remote unit (RAU) 210 and the centralized unit (CU) 230 are interconnected by a protocol layer-to-layer interface. The RLC layer of the remote unit (RAU) 210 and the PDCP layer of the centralized unit (CU) 230 are connected by a control plane interface and a user plane interface.

The centralized unit (CU) 230 sends and receives control plane data to and from the remote unit (RAU) 210 with the core system (EPC) 300 using the RRC layer. Control plane data between the remote unit (RAU) 210 and the centralized unit (CU) 230 is transmitted and received using a protocol defined as RLC.

The centralized unit (CU) 230 transmits and receives user plane data to / from the remote unit (RAU) 210 to the core system (EPC) 300 connected to the S1AP interface using the GTP layer. User plane data between the remote unit (RAU) 210 and the centralized unit (CU) 230 is transmitted and received using a protocol defined by GTP.

The centralized unit (CU) 230 may include a local gateway unit LGW for providing a local breakout service and a cache unit for storing data to be transmitted to the terminal, thereby reducing delay problems.

FIG. 4 is a diagram illustrating a structure of a base station apparatus according to another embodiment of the present invention. All of the protocol layers required for signal processing correspond to embodiments implemented in a remote unit (RAU) 210.

Here, the description of the configuration that is the same as the configuration described in FIG. 3 will be omitted.

Referring to FIG. 4, the centralized unit (CU) 230 includes a C-RRM connected to the D-RRM of the remote unit (RAU) 210 via a radio resource management interface.

The remote unit (RAU) 210 schedules data and resources with the terminal 100 based on the resource allocation information received from the centralized unit (CU) Lt; / RTI > protocol layer.

The remote unit (RAU) 210 includes D-RRM, AAS, PHUY layer, RLC layer, MAC layer, PDCP layer, RRC layer, S1AP layer and GTP layer.

The remote unit (RAU) 210 is connected to the core system (EPC) 300 by a control plane interface and a user plane interface.

The remote unit (RAU) 210 sends and receives control plane data to and from the core system (EPC) 300 using a protocol defined as RRC.

The remote unit (RAU) 210 is connected to the core system (EPC) 300 via the S1AP interface and transmits and receives user plane data to and from the core system (EPC) 300 using a protocol defined as GTP.

A remote unit (RAU) 210 receives data from an external device based on SDR technology, and transmits the D-RRM, AAS, PHUY layer, RLC layer, MAC layer, PDCP layer, RRC layer, Install and upgrade the GTP layer.

Also, the D-RRM, the AAS, the PHUY layer, the RLC layer, the MAC layer, the PDCP layer, the RRC layer, the S1AP layer, and the GTP layer are implemented as hardware modules and can be easily replaced.

As described above, the main eNodeB function can be implemented in the remote unit (RAU) 210 to facilitate femtocell development and MVI.

Meanwhile, in one wireless communication system, the base station equipment structure described in FIG. 3 and the base station equipment structure illustrated in FIG. 4 may be mixed. 3, when the structure of the remote unit (RAU) 210 is the same as that shown in FIG. 3, the central unit (CU) 230 performs the operation described with reference to FIG. , Only radio resource management is performed.

5 is a diagram illustrating a structure of a base station apparatus according to another embodiment of the present invention. And an example in which one centralized unit (CU) is connected to a plurality of remote units (RAU). Referring to FIG. 5, one centralized unit (CU) 230 is connected to a plurality of remote units (RAU) 210-1, 210-3, and 210-5. At this time, the C-RRM of the centralized unit (CU) 230 is connected to the D-RRM of each of the plurality of remote units (RAU) 210-1, 210-3 and 210-5 through a radio resource management interface.

The C-RRM transmits resource allocation information for each cell (RAU) based on information received from a plurality of D-RRMs. Then, each D-RRM schedules data and resources based on the received resource allocation information and transmits the scheduled data and resources to the UE 100. [

As described above, one C-RRM controls radio resource management for a plurality of D-RRMs to perform a CoMP function between cells (RAUs).

6 is a diagram illustrating a virtualization platform structure of a centralized unit (CU) according to an embodiment of the present invention.

Referring to FIG. 6, the central unit (CU) supports functions of RRC, RRM, S1AP, GTP, X2-AP and LGW (Local Gateway) on a general purpose processor (GPP) based general purpose hardware platform. . In addition, the centralized unit (CU) obtains information of RRC, GTP, S1AP, and X2AP-based users, and provides APIs based on the acquired information to provide various application services.

7 is a flowchart illustrating a resource management method of a base station equipment according to an embodiment of the present invention.

Referring to FIG. 7, the D-RRM of one or more remote units (RAU) transmits the radio resource allocation request and the channel status information of the UE to the C-RRM of the centralized unit (CU) (S101).

The C-RRM of the centralized unit CU transmits resource allocation information based on the radio resource allocation request and channel state information to the D-RRM of one or more remote units (RAU) (S103).

The D-RRM of one or more remote units (RAU) schedules data and resources with the terminal based on the received resource allocation information (S105).

FIG. 8 is a flowchart illustrating a data processing method of a base station apparatus according to an embodiment of the present invention, and shows a data processing method of the base station apparatus of FIG.

8, the centralized unit CU processes the control plane data received from the core system (EPC) (S201) and then uses the wireless protocol distributed to the centralized unit (CU) and the remote unit (RAU) And transmits control plane data to one or more remote units (RAU) (S203). Then, one or more remote units (RAU) transmits the control plane data to the terminal (S205).

The centralized unit CU processes the user plane data received from the core system EPC in step S207 and then transmits the user plane data received from the core system EPC to the central unit CU and the remote unit RAU using one or more remote units RAU) (S209). Then, one or more remote units (RAU) transmit user plane data to the terminal (S21).

Here, the control plane data and the user plane data transmitted from the terminal are transferred from the remote unit (RAU) to the centralized unit (CU) using a wireless protocol distributed to the remote unit (RAU) and the centralized unit (CU) And transferred to the core system (EPC) through the central unit (CU).

FIG. 9 is a flowchart illustrating a data processing method of a base station apparatus according to another embodiment of the present invention, and shows a data processing method of the base station apparatus of FIG.

9, at least one remote unit RAU receives (S301) and processing (S303) control plane data from the core system (EPC) using the wireless protocol and then transmits the control plane data to the terminal 100 (S305 ).

The at least one remote unit RAU receives user plane data from the core system EPC using the wireless protocol at step S307 and processes it at step S309 and transmits the user plane data to the terminal 100 at step S311.

Here, the control plane data and user plane data transmitted by the terminal are transferred from the remote unit (RAU) to the core system (EPC) using the wireless protocol in the remote unit (RAU), respectively.

The embodiments of the present invention described above are not implemented only by the apparatus and method, but may be implemented through a program for realizing the function corresponding to the configuration of the embodiment of the present invention or a recording medium on which the program is recorded.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It belongs to the scope of right.

Claims (25)

A remote unit including a medium access control layer and a radio link control layer for performing wireless signal transmission / reception with the terminal, and
A convergence unit that includes a packet data convergence protocol layer and is connected to the remote unit and performs processing of a signal received from the terminal or a signal to be transmitted to the terminal and transmits resource allocation information to the remote unit; ,
The remote unit comprises:
Scheduling data and resources with the MS through the medium access control layer and the radio link control layer based on the resource allocation information received from the centralized unit,
Wherein control plane data and user plane data are transmitted and received between the remote unit and the centralized unit via an interface connected between the radio link control layer and the packet data convergence protocol layer. The method according to claim 1,
The remote unit comprises:
And a distribution-radio resource manager for performing scheduling for allocating radio resources to the mobile station based on the resource allocation information,
Wherein the concentration unit comprises:
And a centralized-radio resource manager for receiving a radio resource allocation request from the distribution-radio resource manager and channel state information of the terminal and transmitting the resource allocation information based on the received information to the distribution-radio resource manager,
Wherein the distribution-radio resource management unit and the centralized-radio resource management unit are connected by a radio resource management interface. 3. The method of claim 2,
One centralized unit is connected to a plurality of remote units,
Wherein the centralized-radio resource management unit is connected to a plurality of distribution-radio resource management units. 3. The method of claim 2,
Wherein the distribution-radio resource management unit comprises:
(TP) between the Tx point (TP) and the Tx point (TP) based on radio resource management information received from the centralized-radio resource management section Base station equipment performing cooperative multipoint operation. 3. The method of claim 2,
The remote unit comprises:
A base station equipment for upgrading the distribution-radio resource management unit using software data received from an external device based on SDR (Software Defined Radio) technology. delete delete The method according to claim 1,
The remote unit comprises:
Base station equipment further comprising an active antenna system and a physical layer. 9. The method of claim 8,
The remote unit comprises:
A base station equipment for installing and upgrading the active antenna system, the physical layer, the medium access control layer, and the radio link control layer using software data received from an external device based on SDR (Software Defined Radio) technology. The method according to claim 1,
Wherein the concentration unit comprises:
Further comprising a radio resource control layer,
And transmitting and receiving control plane data to / from the remote unit using the packet data convergence protocol layer with the core system using the radio resource control layer. The method according to claim 1,
Wherein the concentration unit comprises:
A radio resource control layer, an S1 Application Part (S1AP) layer and a general tunneling protocol layer,
And transmitting and receiving user plane data to / from the remote unit using the packet data convergence protocol layer to the core system connected to the S1AP interface using the general tunneling protocol layer. The method according to claim 1,
The centralized unit operating on a virtualization platform,
A local gateway section for providing a local breakout service, and
A cache unit for storing data to be transmitted to the terminal,
/ RTI > A remote unit that performs wireless signal transmission / reception with the terminal, and
And a centralized unit connected to the remote unit and transmitting resource allocation information to the remote unit,
The remote unit comprises:
A plurality of protocol layers connected to a core system and transmitting and receiving user plane data and control plane data to and from the core system via the plurality of protocol layers, A base station equipment for scheduling data and resources with the terminal through a medium access control layer and a radio link control layer included in a protocol layer. 14. The method of claim 13,
The remote unit comprises:
A radio resource control layer, an S1 Application Part (S1AP) layer and a general tunneling protocol layer,
Wherein the radio resource control layer and the S1AP layer are connected to the core system by a control plane interface,
Wherein the general tunneling protocol layer is connected to the core system by a user plane interface. 14. The method of claim 13,
The remote unit comprises:
And a distribution-radio resource manager for performing scheduling for allocating radio resources to the mobile station based on the resource allocation information,
Wherein the concentration unit comprises:
And a centralized-radio resource manager for receiving a radio resource allocation request from the distribution-radio resource manager and channel state information of the terminal and transmitting the resource allocation information based on the received information to the distribution-radio resource manager,
Wherein the distribution-radio resource management unit and the centralized-radio resource management unit are connected by a radio resource management interface. 16. The method of claim 15,
One centralized unit is connected to a plurality of remote units,
Wherein the centralized-radio resource management unit is connected to a plurality of distribution-radio resource management units. 16. The method of claim 15,
Wherein the distribution-radio resource management unit comprises:
(TP) between the Tx point (TP) and the Tx point (TP) based on radio resource management information received from the centralized-radio resource management section Base station equipment performing cooperative multipoint operation. 16. The method of claim 15,
The remote unit comprises:
Base station equipment using a protocol layer including an active antenna system, a physical layer, a medium access control layer, a radio link control layer, a packet data convergence protocol layer, a radio resource control layer, an S1 Application Part (S1AP) layer and a general tunneling protocol layer . 19. The method of claim 18,
The remote unit comprises:
A base station equipment that upgrades the protocol layer and the distribution-radio resource manager using software data received from an external device based on SDR (Software Defined Radio) technology. In a method of operating a base station equipment including a remote unit and a centralized unit,
The remote unit transmitting a radio resource allocation request to the centralized unit,
Receiving resource allocation information according to the radio resource allocation request from the centralized unit,
Scheduling data and resources with the terminal based on the resource allocation information, and
Transmitting and receiving control plane data and user plane data with the concentrating unit or the core system,
The remote unit comprises:
A medium access control layer and a radio link control layer, and performs scheduling through the medium access control layer and the radio link control layer based on the resource allocation information,
Wherein the control plane data and the user plane data comprise:
The packet data convergence protocol layer included in the convergence unit and the medium access control layer, and is transmitted / received through a plurality of protocol layers connected to the core system. 21. The method of claim 20,
Wherein the scheduling comprises:
Performing a cooperative multipoint operation including at least one of transmission packet synchronization, retransmission control and scheduling control between Tx points (TP) based on the resource allocation information, and optimal precoding of the Tx point (TP) Way. delete 21. The method of claim 20,
Wherein the concentration unit comprises:
A packet data convergence protocol layer, a radio resource control layer, an S1 Application Part (S1AP) layer, and a general tunneling protocol layer,
The remote unit comprises:
A radio link control layer, a medium access control layer, and a physical layer. delete 21. The method of claim 20,
The remote unit comprises:
A radio resource control layer, an S1 Application Part (S1AP) layer, and a general tunneling protocol layer,
The transmitting /
Transmitting and receiving the control plane data using the radio resource control layer and the S1 Application Part (S1AP) layer connected to the core system, and
Transmitting and receiving the user plane data using the general tunneling protocol layer connected to the core system
≪ / RTI >
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