WO2011152683A2

WO2011152683A2 - Apparatus and method for performing communication in wireless communication system for supporting multi-radio access method

Info

Publication number: WO2011152683A2
Application number: PCT/KR2011/004083
Authority: WO
Inventors: 박기원; 이진; 정인욱
Original assignee: 엘지전자 주식회사
Priority date: 2010-06-04
Filing date: 2011-06-03
Publication date: 2011-12-08
Also published as: WO2011152683A3

Abstract

Disclosed are an apparatus and a method for performing communication in a wireless communication system for supporting a multi-radio access method. In a first base station device of the present invention, a receiver receives a first message including a request for binding first identifier information which a first base station assigns to a terminal connected to a second base station and second identifier information which a second base station assigns to the terminal, from the second base station. In addition, the receiver can receive data which the terminal transmits to the second base station, from the second base station. A processor binds the first identifier information and the second identifier information and can recognize the received data as the data transmitted from the terminal on the basis of the information included in the data received from the second base station and the binding. The first message includes the first identifier information and the second identifier information. The first base station supports only a first radio access method and the second base station and the terminal support the first and second radio access methods. The processor can process the data according to the first radio access method by recognizing the data received from the second base station as the data transmitted from the terminal.

Description

Apparatus and method for performing communication in a wireless communication system supporting multiple radio access methods

The present invention relates to wireless communication, and more particularly, to an apparatus and method for performing communication in a wireless communication system supporting multiple wireless access schemes.

In a wireless environment, there are various radio access technologies (RATs) for supporting various types of terminals (hereinafter referred to as RAT), and terminals are connected to various networks in a wireless environment to transmit and receive signals. Multi-mode with two or more wired or wireless connection interfaces.

In this environment, in order for a UE to transmit and receive a signal more efficiently, the UE is not bound to a specific RAT or network and receives a signal using a heterogeneous network (multi-RAT) in order to receive the best service or transmit and receive a signal at the present time. Can transmit

In addition, a terminal belonging to a cellular network may not have a good channel state between the terminal and the base station while performing communication with the base station. The communication in such a bad channel condition significantly reduces the communication performance such as data error. Therefore, when the cellular network has a poor channel condition, it is necessary to transmit data to the base station of the cellular network using another heterogeneous network.

However, the method of using a heterogeneous network for transmitting data to a base station of a cellular network has not been specifically described. In addition, a method for efficiently transmitting signals and increasing throughput by using two or more heterogeneous networks has not been proposed.

An object of the present invention is to provide a method of performing communication in a wireless communication system supporting a multiple wireless access method according to the present invention.

Another object of the present invention is to provide an apparatus for performing communication in a wireless communication system supporting a multiple radio access method according to the present invention.

Technical problems to be achieved in the present invention are not limited to the above technical problems, and other technical problems that are not mentioned will be clearly understood by those skilled in the art from the following description.

In order to achieve the above technical problem, a method of performing communication by a first base station in a wireless communication system supporting a multiple radio access method according to the present invention, the first base station is connected to a terminal that is connected to the second base station Receiving a first message from the second base station requesting to bind the first identifier information allocated to the terminal and the second identifier information allocated to the terminal by the second base station; Binding the first and second identifier information; Receiving data transmitted from the terminal to the second base station from the second base station; And recognizing that the received data is data transmitted by the terminal based on the information included in the data received from the second base station and the binding, wherein the first message includes the first and second identifiers. It includes information, the first base station supports only the first radio access method, the second base station and the terminal supports the first and second radio access method. Here, the data transmitted from the terminal to the second base station is data transmitted through the second wireless access method, and the data transmitted from the terminal to the second base station may be data of the first wireless access method format. have. The method may further include recognizing that the data received from the second base station is data transmitted by the terminal and processing the data according to the first wireless access method. The data transmitted by the terminal to the second base station may include the first identifier information, and the information included in the data received from the second base station may be the second identifier information. The method may further include transmitting a second message to the second base station confirming that the first and second identifier information is bound in response to the first message requesting to bind. . The first identifier information may include a station ID (STID) assigned to the terminal by the first base station, and the second identifier information may include an STID assigned to the terminal by the second base station. .

In order to achieve the above another technical problem, a first base station apparatus for performing communication in a wireless communication system supporting a multiple radio access method according to the present invention, the first base station to a terminal in a connection state with a second base station Receiving a first message from the second base station requesting to bind the first identifier information allocated to the terminal and the second identifier information allocated to the terminal by the second base station, and the terminal transmits the second identifier information to the second base station. A receiver for receiving data from the second base station; And a processor which binds the first and second identifier information, and recognizes that the received data is data transmitted by the terminal based on the information included in the data received from the second base station and the binding. The first message includes the first and second identifier information, wherein the first base station can support only the first radio access method, and the second base station and the terminal can support the first and second radio access methods. have. The first base station apparatus further includes a transmitter for transmitting a second message to the second base station confirming that the first and second identifier information is bound in response to the first message requesting to bind. can do. Here, the data transmitted from the terminal to the second base station may be data transmitted through the second radio access method, and the data transmitted from the terminal to the second base station is data of the first radio access method format. Can be. The processor may recognize that the data received from the second base station is data transmitted by the terminal and process the data according to the first wireless access method.

[Favorable effect]

According to various embodiments of the present disclosure, when a channel state with a base station connected to a cellular network is not good, the terminal may significantly improve the efficiency of communication performance as data is transmitted to the cellular network through another base station.

Effects obtained in the present invention are not limited to the above-mentioned effects, and other effects not mentioned above may be clearly understood by those skilled in the art from the following description. will be.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included as part of the detailed description in order to provide a thorough understanding of the present invention, provide examples of the present invention and together with the description, describe the technical idea of the present invention.

1 is a block diagram illustrating the configuration of a base station 105 and a terminal 110 in a wireless communication system 100.

2 is a diagram illustrating an example of a multi-radio access technology network 200 for explaining a virtual carrier operation according to the present invention.

3 is a diagram illustrating a procedure related to a virtual carrier operation according to an embodiment of the present invention.

4 is a diagram illustrating a procedure related to a virtual carrier operation according to another embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. The detailed description, which will be given below with reference to the accompanying drawings, is intended to explain exemplary embodiments of the present invention and is not intended to represent the only embodiments in which the present invention may be practiced. The following detailed description includes specific details in order to provide a thorough understanding of the present invention. However, one of ordinary skill in the art appreciates that the present invention may be practiced without these specific details. For example, the following detailed description will be described in detail on the assumption that the mobile communication system is an IEEE 802.16 system, but is applicable to any other mobile communication system except for the specific features of IEEE 802.16.

In some instances, well-known structures and devices may be omitted or shown in block diagram form centering on the core functions of the structures and devices in order to avoid obscuring the concepts of the present invention. In addition, the same components will be described with the same reference numerals throughout the present specification.

In addition, in the following description, it is assumed that a terminal collectively refers to a mobile or fixed user terminal device such as a user equipment (UE), a mobile station (MS), an advanced mobile station (AMS), and the like. In addition, it is assumed that the base station collectively refers to any node of the network side that communicates with the terminal such as a Node B, an eNode B, a Base Station, and an Access Point (AP).

In a mobile communication system, a user equipment may receive information from a base station through downlink, and the terminal may also transmit information through uplink. The information transmitted or received by the terminal includes data and various control information, and various physical channels exist according to the type and purpose of the information transmitted or received by the terminal.

1 is a block diagram showing the configuration of a base station 105 and a terminal 110 in a wireless communication system 100.

Although one base station 105 and one terminal 110 are shown to simplify the wireless communication system 100, the wireless communication system 200 may include one or more base stations and / or one or more terminals. .

Referring to FIG. 1, the base station 105 includes a transmit (Tx) data processor 115, a symbol modulator 120, a transmitter 125, a transmit / receive antenna 130, a processor 180, a memory 185, and a receiver ( 190, a symbol demodulator 195, and a receive data processor 197. The terminal 110 transmits (Tx) the data processor 165, the symbol modulator 170, the transmitter 175, the transmit / receive antenna 135, the processor 155, the memory 160, the receiver 140, and the symbol. It may include a demodulator 155 and a receive data processor 150. Although the

antennas

130 and 135 are shown as one at the base station 105 and the terminal 110, respectively, the base station 105 and the terminal 110 are provided with a plurality of antennas. Accordingly, the base station 105 and the terminal 110 according to the present invention support a multiple input multiple output (MIMO) system. The base station 105 according to the present invention may support both a single user-MIMO (SU-MIMO) and a multi user-MIMO (MU-MIMO) scheme.

On the downlink, the transmit data processor 115 receives the traffic data, formats the received traffic data, codes it, interleaves and modulates (or symbol maps) the coded traffic data, and modulates the symbols ("data"). Symbols "). The symbol modulator 120 receives and processes these data symbols and pilot symbols to provide a stream of symbols.

The symbol modulator 120 multiplexes the data and pilot symbols and sends it to the transmitter 125. In this case, each transmission symbol may be a data symbol, a pilot symbol, or a null signal value. In each symbol period, pilot symbols may be sent continuously. The pilot symbols may be frequency division multiplexing (FDM), orthogonal frequency division multiplexing (OFDM), time division multiplexing (TDM), or code division multiplexing (CDM) symbols.

Transmitter 125 receives the stream of symbols and converts it into one or more analog signals, and further adjusts (eg, amplifies, filters, and frequency upconverts) the analog signals to provide a wireless channel. Generates a downlink signal suitable for transmission through the downlink signal, which is then transmitted to the terminal through the antenna 130.

In the configuration of the terminal 110, the antenna 135 receives the downlink signal from the base station and provides the received signal to the receiver 140. Receiver 140 adjusts (eg, filters, amplifies, and frequency downconverts) the received signal, and digitizes the adjusted signal to obtain samples. The symbol demodulator 145 demodulates the received pilot symbols and provides them to the processor 155 for channel estimation.

The symbol demodulator 145 also receives a frequency response estimate for the downlink from the processor 155 and performs data demodulation on the received data symbols to obtain a data symbol estimate (which is an estimate of the transmitted data symbols). Obtain and provide data symbol estimates to a receive (Rx) data processor 150. Receive data processor 150 demodulates (ie, symbol de-maps), deinterleaves, and decodes the data symbol estimates to recover the transmitted traffic data.

The processing by symbol demodulator 145 and receiving data processor 150 is complementary to the processing by symbol modulator 120 and transmitting data processor 115 at base station 105, respectively.

The terminal 110 is on the uplink, and the transmit data processor 165 processes the traffic data to provide data symbols. The symbol modulator 170 may receive and multiplex data symbols, perform modulation, and provide a stream of symbols to the transmitter 175. The transmitter 175 receives and processes a stream of symbols to generate an uplink signal, which is transmitted to the base station 105 via the antenna 135.

In the base station 105, an uplink signal is received from the terminal 110 through the antenna 130, and the receiver 190 processes the received uplink signal to obtain samples. The symbol demodulator 195 then processes these samples to provide received pilot symbols and data symbol estimates for the uplink. The received data processor 297 processes the data symbol estimates to recover the traffic data transmitted from the terminal 110.

Processors

155 and 180 of the terminal 110 and the base station 105 respectively instruct (eg, control, coordinate, manage, etc.) operations at the terminal 110 and the base station 105, respectively.

Respective processors

155 and 180 may be connected to

memory units

160 and 185 that store program codes and data. The

memory

160, 185 is coupled to the processor 180 to store the operating system, applications, and general files.

The

processors

155 and 180 may also be referred to as controllers, microcontrollers, microprocessors, microcomputers, or the like. The

processors

155 and 180 may be implemented by hardware or firmware, software, or a combination thereof. When implementing embodiments of the present invention using hardware, application specific integrated circuits (ASICs) or digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs) configured to perform the present invention. Field programmable gate arrays (FPGAs) may be provided in the

processors

155 and 180.

Meanwhile, when implementing embodiments of the present invention using firmware or software, the firmware or software may be configured to include a module, a procedure, or a function for performing the functions or operations of the present invention, and to perform the present invention. The firmware or software configured to be may be provided in the

processors

155 and 180 or stored in the

memory

160 and 185 to be driven by the

processors

155 and 180.

The layers of the air interface protocol between the terminal and the base station between the wireless communication system (network) are based on the first three layers (L1), the second layer (based on the lower three layers of the open system interconnection (OSI) model well known in the communication system). L2), and the third layer L3. The physical layer belongs to the first layer and provides an information transmission service through a physical channel. A Radio Resource Control (RRC) layer belongs to the third layer and provides control radio resources between the UE and the network. The terminal and the base station may exchange RRC messages through the wireless communication network and the RRC layer.

Referring to FIG. 2, a multi-radio radio access technology (Multi-RAT) network 200 provides a terminal 110 with a plurality of radio access technology (RAT) schemes. Here, the radio access technology (RAT) may be used in various terms such as "wireless communication method" and "wireless access method" as a method for the terminal 110 to connect with the base station 105 or the AP 210 to perform communication. have.

The 802.16 and IEEE 802.11 (hereinafter, referred to as "wireless access") methods used by the multi-radio access technology network 200 to the terminal 110 in the IEEE 802.16 (hereinafter, abbreviated as '802.16') system. It can support all 802.11 methods, which are wireless access methods used in the system. That is, the base station 105 provides a wireless access method using the terminal 110 and the IEEE 802.16 scheme, and the integrated access point (Integrated AP) 210 is a wireless access using the IEEE 802.11 scheme to the terminal 110. It can provide a way. Although the terminal 110 uses the IEEE 802.11 scheme to communicate with the integrated AP 210, when the link state with the base station 105 is poor, the terminal 110 transmits and receives signals, data, and the like according to the IEEE 802.16 scheme. This can be done via 210.

Meanwhile, in FIG. 2, for convenience of description, the IEEE 802.16 scheme and the IEEE 802.11 scheme are illustrated as a multi-radio access technology (RAT) as an example, but the multi-radio access technology network 200 is a code division multiple access (CDMA). A variety of wireless access methods (or wireless communication methods) such as a wideband code division multiple access (WCDMA) scheme, a long term evolution (LTE) scheme, and the like, may be supported.

In FIG. 2, as an example, the terminal 110 supporting the multi-protocols 802.11 and 802.16 (or the multi-radio access scheme) may communicate with the base station 105 (ie, the 802.16 base station). However, if the link state between the terminal 110 and the base station 105 is not good, the multi-radio access technology network 200 continues the seamless communication of the terminal 110 through the integrated AP 210 (seamless) We need to provide a way to do it. Herein, the integrated AP 210 may be called various names such as a multi-AP and a dual AP.

As used herein, the term "virtual carrier" is used to refer to a carrier used in a radio access method other than the radio access method used by the terminal 110 with the base station 105, and as an example, on an 802.11 link. I can say a carrier. When the terminal 110 does not communicate smoothly through the 802.16 link, the terminal 110 may perform seamless communication through the 802.11 carrier.

Referring to FIG. 3, before the terminal 110 and the base station 110 (in this embodiment, the 802.16 base station) perform a network entry process, the base station 110 and the integrated AP 210 each have their own context. Information) (ie, 16 base station identifiers (IDdentfiers), AP MAC addresses, AP service set identifiers (SSIDs), AP extended service set identifiers (ESSIDs), and the like, may be exchanged with each other (S305).

Here, the service set identifier (SSID) is a general name of an identifier of 32 bytes in length for uniquely identifying all devices configuring the wireless network. For example, the SSID is a 32 byte long unique identifier appended to each header of packets transmitted through the WLAN, and may be used as a cipher when wireless devices access a basic service set (BSS). Since the SSID distinguishes one WLAN from another WLAN, all APs or wireless devices to access a specific WLAN must use the same SSID. No device that knows the unique SSID of a particular BSS can connect to that BSS. SSID is text data added on a packet. The ESSID is a type of SSID, also called a net ID, and is an ID combined with letters or numbers suitable for a network environment. ESSID is an ID dedicated to the access point only.

Thereafter, the terminal 110 and the base station 105 may perform an initial network entry process (S310 to S330). The terminal 110 may receive cooperation list (eg, integrated AP list) information from the base station 105 in an initial ranging process (S310). This initial ranging process may be performed through a ranging request / response message (AAI-RNG-REQ / RSP) between the terminal 110 and the base station 105. Meanwhile, as another embodiment of the present invention, the terminal 110 may also receive cooperation list information from the base station 105 through the AAI-NBR-ADV message.

In general, the initial ranging process is a process for the terminal 110 to obtain an accurate timing offset with the base station 105 and to acquire downlink synchronization using a downlink preamble signal received from the base station 105. . Subsequently, after selecting the ranging channel, the terminal 110 selects the ranging preamble code from the initial ranging domain and transmits the selected ranging preamble code to the base station through the selected ranging channel.

After this initial ranging process, the terminal 110 and the base station 105 may perform a negotiate basic capabilities process through an AAI-SBC-REQ / REP message as an example. In addition, the terminal 110 and the base station 105 may perform terminal authentication and key exchange through an AAI-PKM-REQ / RSP message, which is a privacy key MAC (PKM) management message (S320). Thereafter, the terminal 110 and the base station 105 perform a network registration procedure through an AAI-REG-REQ / RSP message (S325).

After completing the network registration procedure, the terminal 110 may generate a new service flow through the AAI-REQ / RSP message with the base station 105 (S330). At this time, in the process of generating the service flow, the base station 105 may transmit information such as SSID, ESSID, MAC address, etc. of the surrounding AP (for example, an integrated AP and an AP supporting only 802.11) to the terminal 110 (S330). ). In addition, the base station 105 may transmit network name, profile name, and MAC address mapping information of the AP (eg, the integrated AP 210 and the AP 220 supporting only 802.11) together (S330). ).

In the initial network entry process (S310 to S330) of the terminal 110, the terminal 110 with respect to the cooperation list information received from the base station 105 in step S310, or for the surrounding AP received from the base station 105 in step S330 The information does not necessarily need to be received in steps S310 and S330, respectively, but may be received during an initial network entry process. In addition, even if it is not necessarily the initial network entry process, the base station 105 may transmit the cooperation list information and / or information about the AP around the terminal 110 to the terminal 110 in step S345 to be described below.

In addition, the base station 105 may assign a station IDentifier (STID) to the terminal 110 during an initial network entry process. The allocated STID may be a unique identifier of the terminal. In this embodiment, it is assumed that the base station 105 has assigned the terminal 110 an STID of 'AAA' during the initial network entry process.

After completing the initial network entry process with the base station 105, the terminal 110 may measure a link state with the base station 105. The link state may be measured by the terminal 110 periodically or aperiodically in an event-triggered manner. If the link state (or channel state) between the terminal 110 and the base station 105 is not better than a predetermined threshold value, the triggering condition is satisfied (S335).

When this triggering condition is satisfied, the terminal 110 scans the base station to scan the integrated AP 210 (eg, an AP supporting 802.16 and 802.11) and an AP 220 supporting only 802.11. (scan interval) may be requested (S340). In this case, the terminal 110 may request the scanning interval from the base station 105 through the AAI-SCN-REQ message as an example (S340). In response to the scan interval request of the terminal 110, the base station 105 transmits, for example, information for scanning the neighbor AP of the terminal 110 to the terminal 110 through an AAI-SCN-RSP message. It may be (S345). For example, the information for scanning may include information in a beacon or probe response. At this time, the base station 105 may allocate the scanning interval in a specific time unit (for example, super frame level) (S345).

Thereafter, the terminal 110 may exchange data (eg, traffic and signaling) with the base station 105 during the interleaving interval (S350). The scanning interval and the interleaving interval may be repeatedly assigned by the base station 105 to the terminal 105.

The terminal 110 may select an AP having a good channel state (or link state) as a result of scanning during the scanning interval, and assume that the integrated AP 210 is selected here. The terminal 110 may perform a process of associating with the 802.11 protocol (or may be referred to as a module for processing an 802.11 signal) of the selected integrated AP 210 (S360). In this step S360, since the terminal 110 previously received information (including identifier information such as SSID, ESSID, MAC address, etc.) of the integrated AP 210 from the base station 105, the base station 105 and the initial network entry process. Rather, it may be a simplified procedure. In addition, in the association process between the terminal 110 and the 802.11 protocol of the integrated AP 210, the integrated AP 210 may allocate the STID as a unique identifier to the terminal 110 (S360). Here, assume that the STID assigned by the unified AP 210 to the terminal 110 is 'BBB'. Alternatively, the integrated AP 210 may allocate 'BBB' as the STID to the terminal 110 in step S370 to be described below, or may allocate the terminal 110 as an L2 transmission message in advance.

The 802.11 protocol of the unified AP 210 that performs the association process with the terminal 110 converts the context information between the terminal 110 and the 802.11 protocol into an 802.16 protocol (or a module that processes an 802.16 signal). It may be delivered through a primitive (S365).

The 802.16 protocol of the integrated AP 210 may transmit information necessary when the terminal 110 enters the 802.16 protocol of the integrated AP 210 through an L2 transfer message (S370).

The terminal 110 may bind 802.11 entry information of the integrated AP 210 and entry information of the base station 105 received through the L2 transfer message. For example, the terminal 110 may bind the STID 'BBB' allocated from the integrated AP 210 and the STID 'AAA' allocated from the base station 105. This binding procedure of the terminal 110 is possible through AAI-SCN-REP and also through a newly defined MAC management message (S375).

After this binding procedure, the terminal 110 maintains the connection state of the base station 105, but may transmit data to the unified AP 210 in a situation in which the channel state is not good (S380). Data transmitted by the terminal 110 in step S380 may be transmitted including the binding portion of the 'AAA' and 'BBB'. In this case, the data transmitted by the terminal 110 is transmitted through an 802.11 wireless access method, but is data in an 802.16 format.

Accordingly, the unified AP 210 may transfer data received from the terminal 110 to a carrier of 802.16 in a virtual carrier of 802.11 (S385). In addition, the 802.16 protocol of the integrated AP 210 may transmit the received data to the base station 105 including the STID 'BBB' (S390).

Then, the processor 180 of the base station 105 receives the data including the STID BBB from the 802.16 protocol of the integrated AP 210 based on the information (STID AAA and STID BBB) bound from the terminal 110 in step S375 The terminal 110 having the STID AAA assigned by the terminal 110 may recognize that the terminal 110 transmits data to the terminal 110 (S390). The processor 180 of the base station 105 may process the received data in the same manner as that received through the terminal 110 and the cellular network.

Referring to FIG. 4, as shown and described with reference to FIG. 3, the base station 105 and the integrated AP 210 each have their own context information (ie, 16 base station identifiers (IDdentfiers, IDs), AP MAC addresses). The service set identifier (SSID) of the AP, the extended service set identifier (ESSID), etc. of the AP may be exchanged with each other (S405). In addition, as in steps S310 to S330 of FIG. 3, the terminal 110 and the base station 105 may perform an initial network entry process (S410 to S430).

The terminal 110 may receive cooperation list (eg, integrated AP list) information from the base station 105 in an initial ranging process (S410). This initial ranging process may be performed through a ranging request / response message (AAI-RNG-REQ / RSP) between the terminal 110 and the base station 105. Meanwhile, as another embodiment of the present invention, the terminal 110 may also receive cooperation list information from the base station 105 through the AAI-NBR-ADV message.

Thereafter, the terminal 110 and the base station 105 may perform a process of negotiating basic capabilities through an AAI-SBC-REQ / REP message as an example. In addition, the terminal 110 and the base station 105 may perform terminal authentication and key exchange through an AAI-PKM-REQ / RSP message, which is a privacy key MAC (PKM) management message (S420). Thereafter, the terminal 110 and the base station 105 perform a network registration procedure through an AAI-REG-REQ / RSP message (S425).

After completing the network registration procedure, the terminal 110 may generate a new service flow through the base station 105, for example, through an AAI-REQ / RSP message (S430). At this time, in the process of generating the service flow, the base station 105 may transmit information such as SSID, ESSID, and MAC address of the surrounding AP (for example, an AP that supports only the integrated AP and 802.11) to the terminal 110 (S430). ). In addition, the base station 105 may transmit network name, profile name, and MAC address mapping information of the AP (eg, the integrated AP 210 and the AP 220 supporting only 802.11) together (S430). ).

In the initial network entry process (S410 to S430) of the terminal 110, the terminal 110 with respect to the cooperation list information received from the base station 105 in step 4310, or the neighboring AP received from the base station 105 in step S430 Information does not necessarily need to be received in steps S410 and S430, respectively, but may be received during an initial network entry process. In addition, even if not necessarily an initial network entry process, the base station 105 may transmit the cooperation list information and / or information about the AP around the terminal 110 to the terminal 110 in operation S445 to be described below.

In addition, the base station 105 may assign a station IDentifier (STID) to the terminal 110 during an initial network entry process. The allocated STID may be a unique identifier of the terminal. In the present embodiment, it is assumed that the base station 105 assigns the terminal 110 an STID of 'AAA' during an initial network entry process.

After completing the initial network entry process with the base station 105, the terminal 110 may measure a link state with the base station 105. The link state may be measured by the terminal 110 periodically or aperiodically in an event-triggered manner. If the link state (or channel state) between the terminal 110 and the base station 105 is not better than a predetermined threshold value, the triggering condition is satisfied (S435).

When this triggering condition is satisfied, the terminal 110 scans the base station to scan the integrated AP 210 (eg, an AP supporting 802.16 and 802.11) and an AP 220 supporting only 802.11. (scan interval) may be requested (S440). In this case, the terminal 110 may request the scanning interval from the base station 105 through the AAI-SCN-REQ message as an example (S440). In response to the scan interval request of the terminal 110, the base station 105 transmits, for example, information for scanning the neighbor AP of the terminal 110 to the terminal 110 through an AAI-SCN-RSP message. It may be (S445). For example, the information for scanning may include information in a beacon or probe response. In this case, the base station 105 may allocate the scanning interval in a specific time unit (for example, superframe level) (S445).

Thereafter, the terminal 110 may exchange data (eg, traffic and signaling) with the base station 105 during the interleaving interval (S450). The scanning interval and the interleaving interval may be repeatedly assigned by the base station 105 to the terminal 110.

The terminal 110 may select an AP having a good channel state (or link state) as a result of scanning during the scanning interval, and assume that the integrated AP 210 is selected here. The terminal 110 may perform a process of associating with an 802.11 protocol (or a module for processing an 802.11 signal) of the selected integrated AP 210 (S460). In step S460, since the terminal 110 previously received information (including identifier information such as SSID, ESSID, MAC address, etc.) of the integrated AP 210 from the base station 105, the base station 105 and the initial network entry process. Rather, it may be a simplified procedure.

In addition, in the association process between the terminal 110 and the 802.11 protocol of the integrated AP 210, the integrated AP 210 may allocate the STID as a unique identifier to the terminal 110 (S460).

The 802.11 protocol of the unified AP 210 that performs the association process with the terminal 110 converts the context information between the terminal 110 and the 802.11 protocol into an 802.16 protocol (or a module that processes an 802.16 signal). It may be delivered through a primitive (S465). Then, the 802.16 protocol of the unified AP 210 may transmit a message requesting binding to the base station 105 through an AAI-client-cooperation-REQ message or the like (S470).

Then, the processor 180 of the base station 105 may bind the entry information for the terminal 110 to enter the 802.11 protocol of the integrated AP 210 and the entry information for entering the self. For example, the processor 180 of the base station 105 may bind the STID 'BBB' allocated to the terminal 110 by the integrated AP 210 and the STID 'AAA' assigned thereto. After performing this binding procedure, the base station 105 receives the message confirming the binding through the AAI-client-cooperation-RSP message or the like in response to the binding request of the 802.16 protocol of the integrated AP 210. It can be transmitted by the 802.16 protocol of (S475).

Although the terminal 110 maintains the connection state with the base station 105, in a situation where the channel state is not good, data may be transmitted through the 802.11 protocol of the integrated AP 210 (S480). In this case, the data transmitted by the terminal 110 is transmitted through an 802.11 wireless access method, but is data in an 802.16 format.

Accordingly, the unified AP 210 may transfer the data of the 802.16 format received from the terminal 110 from the 802.11 virtual carrier to the carrier of 802.16 (S485). In addition, the 802.16 protocol of the integrated AP 210 may transmit the received 802.16 format data to the base station 105 including STID 'BBB' (S490).

Then, the processor 180 of the base station 105 transmits the data transmitted by the 802.16 protocol of the integrated AP 210 based on the binding information performed in the binding procedure (that is, the binding of the STID 'AAA' and the STID 'BBB'). It can be recognized that the data of the 802.16 format transmitted by the terminal 110. Therefore, the processor of the base station 105 may process the received 802.16 format data according to the 802.16 wireless access scheme.

According to the embodiments described above, even when the channel state of the cellular network of the terminal and the channel condition is not good, the data is transmitted to the base station of the cellular network through the unified AP, and the unified AP delivers the data back to the base station of the cellular network By doing so, efficient communication can be performed.

The embodiments described above are the components and features of the present invention are combined in a predetermined form. Each component or feature should be considered optional unless stated otherwise. Each component or feature may be embodied in a form that is not combined with other components or features. It is also possible to combine some of the components and / or features to form an embodiment of the invention. The order of the operations described in the embodiments of the present invention may be changed. Some components or features of one embodiment may be included in another embodiment or may be replaced with corresponding components or features of another embodiment. It is obvious that the claims may be combined to form an embodiment by combining claims that do not have an explicit citation relationship in the claims or as new claims by post-application correction.

It is apparent to those skilled in the art that the present invention can be embodied in other specific forms without departing from the spirit and essential features of the present invention. Accordingly, the above detailed description should not be construed as limiting in all aspects and should be considered as illustrative. The scope of the invention should be determined by reasonable interpretation of the appended claims, and all changes within the equivalent scope of the invention are included in the scope of the invention.

An apparatus and method for performing communication in a wireless communication system supporting multiple radio access methods are industrially available in various communication systems such as 3GPP LTE, LTE-A, IEEE 802.

Claims

A method for performing communication by a first base station in a wireless communication system supporting a multiple radio access method,

A second message for requesting to bind the first identifier information allocated to the terminal in which the first base station is connected to the second base station and the second identifier information allocated to the terminal in the second base station; Receiving from a base station;

Binding the first and second identifier information;

Receiving data transmitted from the terminal to the second base station from the second base station; And

Recognizing that the received data is data transmitted by the terminal based on the information contained in the data received from the second base station and the binding,

The first message includes the first and second identifier information, wherein the first base station supports only a first radio access method, and the second base station and the terminal support the first and second radio access methods. A communication performing method in a wireless communication system supporting a multiple wireless access method.
The method of claim 1,

The data transmitted from the terminal to the second base station is data transmitted through the second radio access method, the communication performance method in a wireless communication system supporting multiple radio access methods.
The method of claim 2,

The data transmitted from the terminal to the second base station is data of the first radio access method format, the communication performing method in a wireless communication system supporting multiple radio access methods.
The method of claim 1,

Recognizing that the data received from the second base station is the data transmitted by the terminal, and further comprising processing the data according to the first wireless access method, communication in a wireless communication system supporting multiple radio access methods. How to do it.
The method of claim 2,

The data transmitted from the terminal to the second base station includes the first identifier information, the method of performing communication in a wireless communication system supporting a multiple radio access scheme.
The method of claim 1,

The information included in the data received from the second base station is the second identifier information, the method of performing communication in a wireless communication system supporting a multiple radio access scheme.
The method of claim 1,

And sending a second message to the second base station confirming that the first and second identifier information is bound in response to the first message requesting to bind. Method of performing communication in a supported wireless communication system.
The method of claim 1,

The first identifier information includes a station identifier (Station ID, STID) assigned to the terminal by the first base station, and the second identifier information includes a STID assigned to the terminal by the second base station. Communication performing method in a wireless communication system supporting a wireless access method.
A first base station apparatus for performing communication in a wireless communication system supporting a multiple radio access method,

A second message for requesting to bind the first identifier information allocated to the terminal in which the first base station is connected to the second base station and the second identifier information allocated to the terminal in the second base station; A receiver which receives from a base station and receives data transmitted from the terminal to the second base station from the second base station;

A processor that binds the first and second identifier information and recognizes that the received data is data transmitted by the terminal based on the information included in the data received from the second base station and the binding;

The first message includes the first and second identifier information, wherein the first base station supports only a first radio access method, and the second base station and the terminal support the first and second radio access methods. A first base station apparatus.
The method of claim 9,

And a transmitter for transmitting a second message to the second base station confirming that the first and second identifier information is bound in response to the first message requesting to bind.
The method of claim 9,

Data transmitted from the terminal to the second base station is data transmitted through the second radio access method, the first base station apparatus.
The method of claim 10,

And the data transmitted from the terminal to the second base station is data of the first radio access method format.
The method of claim 9,

And the processor recognizes the data received from the second base station as the data transmitted by the terminal and processes the data according to the first radio access method.