KR100824050B1 - Apparatus and method for linking different kinds of networks and recording medium thereof - Google Patents

Abstract

A gateway apparatus for linking different kinds of networks, and a method and a recording medium thereof are provided to perform efficient communication without a help of an upper layer for an uplink stream transmitted from a WPAN(Wireless Personal Area Network) to a backbone network, use the bandwidth of a Wibro(Wireless Broadband) backbone network efficiently for bandwidth requested according to a PAN as the sensor nodes of an LR(Low Rate)-WPAN are increased or decreased, and vary a QOS policy requested according to the PAN. A binding table(2252) stores relation between a connection ID(Identification) for bandwidth setting and service flow IDs for QOS(Quality Of Service) policy setting according to the ID of a PAN(Personal Area Network) device. An IP(Internet Protocol) map table(2253) allocates an IP address according to the ID of the PAN device and stores the allocated IP address if the PAN device is initiated. A binding module(2251) requests an uplink BS(Base Station) to transmit the connection ID for a PAN device, of which the bandwidth is changed, if the bandwidth of an arbitrary PAN device is changed, and sets the binding table with the connection ID allocated by the BS.

Description

Gateway device interworking heterogeneous networks, method and recording medium {Apparatus and Method for linking different kinds of networks and Recording medium}

1A is a conceptual diagram of a network system to which the present invention is applied.

1B is a block diagram of a gateway device interworking heterogeneous networks according to the present invention.

2 is a block diagram illustrating an example of the binding block 125 of FIG. 1B.

3 is a block diagram illustrating another example of the binding block 125 of FIG. 1B.

FIG. 4 illustrates an example of a binding table setting process of the binding block 125 of FIG. 1B.

5 is a flowchart of a method for interworking heterogeneous networks according to the present invention.

The present invention relates to IEEE 802.15.4 and IEEE 802.16e, and more particularly, to a gateway device interworking heterogeneous networks, a method and a recording medium.

Recently, as public interest in home networks has increased greatly, wireless personal area network (PAN) technology, which is a personal wireless networking solution used in a short distance of about 10m, is drawing attention. Wireless PAN technology is getting more attention than traditional wired home networking technologies such as Ethernet, PLC, HomePNA, etc. because of its ease of use that requires no wiring.

The wireless communication technologies developed to date are 2.5 / 3G cellular wireless WAN technology widely used by the general public according to transmission coverage and application, wireless MAN technology (mobile Internet), also called wireless DSL, and wireless LAN technology to establish a local wireless communication network. And wireless PAN technology, which is a short-range personal wireless communication technology, which will be introduced later.

Among these, short-range wireless communication technologies that individuals can use at home include wireless LAN and wireless PAN. Wireless LANs will be used mainly for the expansion of broadband Internet access connections in terminals such as PCs, laptops and PDAs. Bluetooth is expected to be used in mobile communication terminals, headsets, PCs, PC peripherals, and home appliances, UWB for multimedia home entertainment products such as digital camcorders, cameras, set-top boxes, and DVRs, and ZigBee for home automation.

The IEEE 802.15.4 standard describes a method of forming an LR-WPAN that communicates between devices at relatively low speed (maximum transmission rate of 250 Kbps) within a communication area of about 10 meters. The LR-WPAN supports up to 16 channels in the 2.4 GHz Industrial Scientific Medical (ISM) band frequency and features characteristics such as low rate, low cost, scalability, and low power.

IEEE 802.15.4 technology is showing rapid growth in technology development and market formation compared to the various wireless networking standards such as Bluetooth and Wi-Fi, which are struggling in the market. The IEEE 802.15.4 standard covering the PHY and MAC layers was completed in 2003, and the ZigBee standardization for higher layers related to the application was completed at the end of 2004 by the ZigBee alliance. We have completed the profile creation in the home automation, factory automation, and industrial automation fields according to the application fields, and are in the process of creating additional application profiles.

The communication mode of ZigBee network is based on master-slave method, but it supports P2P (Point-to-point) method called Mash mode that can select multiple paths. By designating a device as a coordinator in the network and changing the state of the sleep mode to the active state only when a transmission / reception function is required, power consumption can be minimized.

Coordinators of neighboring networks can communicate with each other, and the network can be expanded to form a large network. In Mash mode with multipath selection, the network can be configured automatically by changing the path when a specific node is not recognized. O-QPSK modulation method of 2.4GHz band is used for stable communication between adjacent networks and devices.

The basic protocol of the LR-WPAN follows the standard defined in IEEE 802.15.4 and uses the CSMA-CA method for channel allocation as in IEEE 802.11 and IEEE 802.15.3 based wireless networks. The optional GTS allocation method is applied to support the case where real time data transmission is required. ZigBee nodes can act as coordinators or end devices, concentrating most of the load on the coordinator and reducing the functionality of the end devices, thus reducing the resources and costs of implementation.

ZigBee devices can be classified into three types according to the purpose of the device. They are divided into ZigBee PAN Coordinator, ZigBee Router, and ZigBee Terminator.

ZigBee devices are divided into reduced function device (RFD) and full function device (FFD) according to the difference in performance. The reason for this distinction is to reduce power consumption by minimizing the function of RFD.

FFD can communicate with both FFD and RFD, and can be one of three kinds of device-specific ZigBee PAN coordinator, ZigBee router, ZigBee end device, while RFD can communicate with FFD only and RFD communicates with each other. Can not. RFD is used as an end device, but not as a ZigBee coordinator or ZigBee router. RFD has minimum resources and memory, so it is used as an end device such as a sensor node.

The IEEE 802.16e standard (hereinafter referred to as Wibro) describes a method for forming a Mobile Wireless MAN that provides downlink up to 18.432Mbp and uplink up to 6.144Mbps in a communication area of about 1km. This standard is used to create a backbone network that can communicate on the wireless medium at speeds of up to 60 km.

802.16e is called Mobile WiMAX. There are two types of WiMAX. There are 802.16-2004 (or 802.16d) called Fixed WiMAX and 802.16e called Mobile WiMAX.

The main difference between the two profiles is their mobility, as the name suggests. While 802.16e supports mobility, 802.16-2004 does not support mobility.

The most prominent of the benefits of 802.16e is also mobility. It supports mobility by supporting handover between base stations. One of the major advantages of 802.16e along with mobility is that it is based on IP. This is a big advantage if you think that all the technologies are going to be all-IP based as you move toward 4G. It will be able to take a leading position in the future convergence sector.

ALL-IP is expected to be the core of the new, next-generation (4th generation) mobile network. In other words, the term mobile IP is used. If the communication is performed by the conventional mobile communication network that exchanges the caller and the receiver of the telephone, ALL-IP has an IP address for each terminal and uses the IP address to connect the calling party and the receiving party. Will be. The concept of hopping is also used because it does not go through an exchanger. Because of the use of IP addresses, it is expected that significant progress will be made in terms of speed and range of use.

802.16e is a new opportunity for companies without 3G licenses or existing wired Internet operators. Since 802.16e guarantees full mobility without using the existing 3G network, it is easy for new operators to enter the business. 802.16e also supports Non Line Of Sight (NLOS). In other words, the service is available even in hilly mountains and high-rise buildings. As a result, existing wired ISPs will be able to provide Internet services using 802.16e even in areas where cable installation has been a heavy burden, and will also have the opportunity to enter the mobile market. It can also be a backhaul to other networks such as WiFi. 802.16e uses SOFDMA as a channel multiplexing technology.

The features of the service over 802.16e are largely space, mobility, and large capacity. Spatiality means services that can be used outdoors, not indoors only. There are three main types of terminals that will use 802.16e services. Cell phone type, PDA type and card type are those. Card type refers to a card that will be inserted into a notebook or handheld PC.

However, in the related art, since there is no gateway device having both interfaces for connecting two different networks whose backbone network is WiBro and the access network is LR-WPAN, efficient communication between heterogeneous networks is difficult and requires the help of a higher layer. There is a problem in that an overhead in packet transmission between heterogeneous networks becomes large.

Accordingly, the first technical problem to be achieved by the present invention is to provide a gateway device for interworking heterogeneous networks to enable efficient communication for uplink streams transmitted from a WPAN network to a backbone network without the help of a higher layer.

Another object of the present invention is to provide a method of interworking heterogeneous networks applied to a gateway device interworking the heterogeneous networks.

A third technical object of the present invention is to provide a computer-readable recording medium having recorded thereon a program for executing a method of interworking the heterogeneous networks on a computer.

In order to achieve the first technical problem, the present invention provides a binding table for storing a relationship between a connection ID for bandwidth setting and a service flow ID for QoS policy setting for each ID of a PAN device; An IP map table for allocating and storing IP addresses according to IDs of the PAN devices when the PAN device is initialized; And a binding for requesting a connection ID for the PAN device whose bandwidth is changed to the base station in the uplink direction when the bandwidth for any PAN device is changed and setting the binding table with the connection ID assigned by the base station. Provided is a gateway device for interworking heterogeneous networks including modules.

In order to achieve the second technical problem, the present invention, when the PAN device is initialized, allocates an IP address for each ID of the PAN device, stores it in an IP map table, and connects a connection ID for bandwidth setting for each ID of the PAN device. Storing a relationship between service flow IDs for QoS policy setting in a binding table; Requesting, by the base station in the uplink direction, a connection ID for the PAN device whose bandwidth has changed if the bandwidth for any PAN device has changed; And when the connection ID for the PAN device whose bandwidth has been changed by the base station is set, setting the binding table with the allocated connection ID.

In order to achieve the third technical problem, the present invention provides a computer-readable recording medium having recorded thereon a program for executing a method of interworking the heterogeneous networks on a computer.

The present invention provides a gateway device having both interfaces in order to connect two different networks where the backbone network is WiBro and the access network is LR-WPAN.

The present invention relates to a medium access control (MAC) layer according to an increase and decrease of nodes of an LR-WPAN in a device in which an 802.15.4 MAC / PHY (Low-Wireless Personal Area Network) device and an 802.16e MAC / PHY device are combined. The present invention relates to a method of controlling bandwidth for each PAN or providing Qos (Quality of Service) by directly controlling the Pn.

Hereinafter, with reference to the drawings will be described a preferred embodiment of the present invention. However, embodiments of the present invention illustrated below may be modified in many different forms, and the scope of the present invention is not limited to the embodiments described below.

1A is a conceptual diagram of a network system to which the present invention is applied.

FIG. 1A illustrates a gateway device 120 interoperating with a WiBro network and an LR-WPAN network, a base station 110 connected to a WiBro backbone network, and sensor nodes 131-139 of the LR-WPAN. ).

The gateway device 120 interoperating with the WiBro network and the LR-WPAN network according to the present invention has the following two interfaces.

The interface in the uplink direction is as follows.

This interface communicates with devices in the core network, for example, the Internet. The gateway device 120 of the present invention has a function of a subscribe station (SS) in order to be connected with the base station (BS) device.

The interface in the downlink direction is as follows.

It communicates with the sensor nodes 131-139 of the LR-WPAN through this interface. One LR-WPAN is assigned a single PAN ID for each PAN, and there is one full-function device (FFD) that performs a PAN coordinator function. The PAN coordinator performs a function of integrated management of all sensor nodes 131-139 in the PAN. That is, the gateway device of the present invention has the function of a PAN coordinator.

In FIG. 1A, there is one link in the uplink direction between the base station 110 and the gateway 120, that is, the subscriber station, and the gateway 120, that is, the PAN coordinator and the LR-WPAN. May have a PAN. That is, PAN devices (devices 131-139) exist for the PAN ID. The PAN coordinator and the sensor nodes 131 to 139 are configured in a star topology.

1B is a block diagram of a gateway device interworking heterogeneous networks according to the present invention.

The binding block 125 converts the above MAC blocks 124 and 126 to interwork with the WiBro network and the LR-WPAN network in the MAC layer of the 802.16e MAC block 124 and the 802.15.4 MAC block 126. To control. The binding block 125 utilizes the functions conventionally provided in the Mac layer to implement the two interfaces described above.

The upper layer includes the application layer 121, the middleware 122, and the network layer 123, but the upper layer is not used to interoperate heterogeneous networks in the present invention.

The lower layers include the 802.16e PHY block 127 and the 802.15.4 PHY block 128.

2 is a block diagram illustrating an example of the binding block 125 of FIG. 1B.

As shown in FIG. 2, the binding block 225 includes a binding module 2251, a binding table 2252, and a PAN ID to IP map table 2253.

The binding module 2251 allocates a connection ID for the PAN ID from the base station 110 and sets the bandwidth based on pre-prepared information on the bandwidth and Qos policy of the corresponding PAN of the LR-WPAN. The binding table 2252 is set by receiving an ID. The binding module 2251 uses the 802.16e MAC block 224 connected to the binding block 225 to request the base station 110 to assign a connection ID or a service flow ID. The binding module 2251 uses the 802.15.4 MAC block 126 to receive information about the PAN device, such as the PAN ID.

The binding table 2252 stores a relationship between a connection ID for setting a bandwidth for each PAN ID and a service flow ID for setting a Qos policy.

The IP map table 2253 allocates and stores an IP address for each PAN ID.

The data structures of the binding table 2252 and the IP map table 2253 are as follows.

First, the binding table will be described.

To transfer data between the WiBro base station and the subscribe station, the base station first requests initialization of one PAN ID and then requests an 802.16e MAC block for uplink based on the bandwidth and Qos configuration requirements prepared for each PAN ID. Obtain connection ID and service flow ID in the () direction and store them in the binding table.

An example of the structure of the binding table is shown in Table 1 below.

Item size Contents PAN ID 16 bits This identifier is used by the device. Connection ID 16 bits Identifies the service flow for both SS and BS. Service flow ID 32 bits Identifies the connection to the corresponding communication entity in the MAC of the BS and SS. Assigned to a service flow ID is a parameter that defines the quality of service (QoS) of the service flow associated with the connection. Security associations (SAs) also exist between the keying material and the CIDs.

In this case, security associations (SAs) refer to a relationship in which authentication and encryption algorithms and encryption keys are shared between a transmitter and a receiver communicating through IP Security Protocol (IPSEC). It is generated by mutual negotiation to provide a security service and is identified by a security parameter index (SPI), an IP destination address, an authentication header (AH), and a security payload encapsulation (ESP). It features a one-way connection and requires two security associations for each direction if two-way communication is required.

Next, the IP map table will be described.

When the PAN of LR-WPAN is initialized, IP address is assigned to each PAN so that IP forwarding can be performed in All-IP environment. It is used to set the source IP address of the uplink stream delivered from the PAN to the core network.

An example of the structure of the IP map table is shown in Table 2 below.

Item size Contents PAN ID 16 bits This identifier is used by the device. IP address 32 bits IP address for a specific PAN ID. In the future, this field may be extended to 128 bits for IPv6.

3 is a block diagram illustrating another example of the binding block 125 of FIG. 1B.

When the bandwidth for any PAN device is changed, the binding module 350 requests the base station 110 in the uplink direction for a connection ID for the PAN device whose bandwidth is changed, and the connection allocated by the base station 110. The binding table 354 is set by the ID. Preferably, the binding module 350 requests the base station 110 in the uplink direction for the service flow ID for the PAN device whose QoS policy is changed when the QoS policy for any PAN device is changed, and the base station ( 110 may be configured to set the binding table 354 with the service flow ID assigned by 110. Preferably, the binding module 350 monitors the amount of traffic per PAN device, and if the amount of monitored traffic is higher than the upper threshold or lower than the lower threshold, the connection ID and the required bandwidth corresponding to the specific PAN device are 802.16e MAC. May be configured to request block 340. At this time, the upper reference value and the lower reference value is a traffic value that can be arbitrarily set by those of ordinary skill in the art.

The binding table 354 stores the relationship between the connection ID for bandwidth setting and the service flow ID for QoS policy setting for each ID of the PAN device.

When the PAN device is initialized, the IP map table 355 allocates and stores an IP address for each ID of the PAN device.

The binding module 350 includes a downlink packet processor 351, a packet generator 352, and an uplink packet processor 353 to transfer packets between the WiBro network and the LR-WPAN network.

When the packet is received from the 802.16e MAC block 340, the downlink packet processor 351 extracts a PAN ID existing in the received packet and uses the 802.15.4 MAC block 360 to extract the PAN ID. Send the received packet to the corresponding PAN device.

When a packet is received from an arbitrary PAN device, the packet generator 352 refers to an IP map table 355 and sets an IP address corresponding to an ID of a PAN device that has transmitted a packet as a source IP address. Create a packet.

The uplink packet processor 353 transmits a connection ID, a service flow ID, and an IP packet generated by the packet generator 352 to the 802.16e MAC block with reference to the binding table. do.

4 illustrates an example of a binding block 125 of FIG. 1B, that is, a binding table setting process of the binding module.

The binding block stores the following set of control commands.

Binding Block Initialization allocates and initializes the binding table and IP map table memory of the binding block.

Binding block termination frees the binding table's binding table and IP map table memory.

The binding block configuration will be described with reference to the binding table configuration message flow of FIG. 4.

First, when a change 410 of a bandwidth or QoS policy for a PAN ID occurs or the PAN device is initialized 420, a control command for binding block configuration is called.

In this case, one IP is allocated for each PAN ID in the IP pool and a service flow ID and connection ID corresponding to the PAN ID are requested to the 802.16e MAC block (430).

Next, the service flow ID and the connection ID are obtained from the base station (440) and stored in the binding table (450).

Finally, the 802.15.4 MAC block is notified of the completion of the establishment of the binding entry for the PAN ID.

According to the control command for bandwidth update stored in the binding block, the binding block monitors the traffic amount per PAN, and if there is more traffic than the upper reference value or there is less traffic than the lower reference value, 802.16 together with the connection ID corresponding to the PAN ID is used. e Ask the Mac block for proper bandwidth.

According to the control command for Qos update stored in the binding block, Qos configuration value change message for each flow ID or connection ID is transmitted to the 802.16e MAC block. This process can be based on values defined in the 802.16e standard.

5 is a flowchart of a method for interworking heterogeneous networks according to the present invention.

First, it is determined whether the PAN device is initialized (step 510).

When the PAN device is initialized, an IP address is allocated for each ID of the initialized PAN device and stored in the IP map table, and the relationship between the connection ID for bandwidth setting and the service flow ID for QoS policy setting is determined for each PAN device ID. In operation 520, the controller stores the data at step 520.

Next, it is determined whether the bandwidth for any PAN device is changed (step 530).

In this case, if the bandwidth of any PAN device is changed, the connection ID for the PAN device whose bandwidth is changed is requested to the base station in the uplink direction (S540). Next, when a connection ID for the PAN device whose bandwidth has been changed is allocated by the base station, a binding table is set using the allocated connection ID (step 540).

Next, it is determined whether the QoS policy for any PAN device is changed (step 550).

At this time, if the QoS policy for any PAN device is changed, the service flow ID for the PAN device whose QoS policy is changed is requested to the base station in the uplink direction (step 560). In this case, if the service flow ID for the PAN device whose bandwidth is changed by the base station is allocated, the binding table is set to the assigned service flow ID (step 560).

At this time, the processing of the downlink packet stream is as follows.

The binding block finds a PAN ID that already exists in the packet transmitted from the 802.16e MAC block and sends it directly to the corresponding PAN device. In this case, it is assumed that the downlink stream delivered to the PAN in the All-IP environment is delivered with a destination IP address that matches the PAN ID and also has a PAN ID value therein.

Next, a process of the uplink packet stream is as follows.

The binding block receives a packet from an arbitrary PAN and processes it as follows. First, an IP packet having an IP address corresponding to a PAN ID as a source address is generated by referring to an IP map table. Next, the IP packet is delivered to the 802.16e MAC block of the subscription station along with the connection ID and the service flow ID corresponding to the PAN ID, and the 802.16e MAC frame is created and delivered to the base station.

In the present invention, the function provided by the MAC layer between the subscriber station and the base station of the WiBro network, that is, the function of providing Qos and bandwidth divided by connection IDs and one-to-one correspondence of connection IDs with one PAN ID By doing so, the uplink stream transmitted from the WPAN network to the backbone network can be efficiently communicated as follows without assistance of a higher layer.

First, by controlling the bandwidth required for each PAN according to the increase and decrease of sensor nodes of the LR-WPAN network, the MAC layer directly controls the bandwidth of the WiBro backbone network.

LR-WPAN, on the other hand, does not support Qos at the Mac layer. However, through the present invention, by varying the Qos policy required for each PAN, it is possible to efficiently distribute resources between the base station and the subscribe station of the WiBro network connected to the WPAN, and to provide differentiated services for each indirect PAN unit. .

According to the present invention, the gateway receives the packet from the base station, finds the connection ID and the PAN ID in the binding table, and delivers the packet directly in the MAC layer to eliminate overhead such as Layer 3 IP lookup. have.

In addition, IP packet delivery using the IP map table (a table in which one IP address is assigned to each PAN) for the uplink stream is made and used as an IP packet as a source IP address. You can do that.

Preferably, a program for executing a method of interworking heterogeneous networks of the present invention on a computer may be recorded and provided on a computer-readable recording medium.

The invention can be implemented via software. When implemented in software, the constituent means of the present invention are code segments that perform the necessary work. The program or code segments may be stored on a processor readable medium or transmitted by a computer data signal coupled with a carrier on a transmission medium or network.

Computer-readable recording media include all kinds of recording devices that store data that can be read by a computer system. Examples of computer-readable recording devices include ROM, RAM, CD-ROM, DVD ± ROM, DVD-RAM, magnetic tape, floppy disks, hard disks, optical data storage devices, and the like. The computer readable recording medium can also be distributed over network coupled computer devices so that the computer readable code is stored and executed in a distributed fashion.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary and will be understood by those of ordinary skill in the art that various modifications and variations can be made therefrom. However, such modifications should be considered to be within the technical protection scope of the present invention. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

As described above, according to the present invention, an uplink stream transmitted from a WPAN network to a backbone network can be efficiently communicated without assistance of a higher layer, and is required for each PAN according to the increase and decrease of sensor nodes of an LR-WPAN network. By efficiently using the bandwidth of the WiBro backbone network for the bandwidth, and by varying the Qos policy required for each PAN, the resource can be efficiently distributed between the base station and the substation station of the WiBro network connected to the WPAN, and the indirect PAN. Differentiated services can be provided per unit, and overhead such as Layer 3 IP lookup can be eliminated for downlink streams, and IP packets can be delivered more efficiently in all-IP environments for uplink streams. It can work.

Claims (11)

A binding table for storing a relationship between a connection ID for bandwidth setting and a service flow ID for QoS policy setting for each ID of the PAN device; An IP map table for allocating and storing IP addresses according to IDs of the PAN devices when the PAN device is initialized; And If the bandwidth for any PAN device is changed, the binding module for requesting a connection ID for the PAN device with the changed bandwidth to the base station in the uplink direction, and sets the binding table with the connection ID assigned by the base station. Gateway device interworking heterogeneous networks comprising a. The method of claim 1, The binding module When the QoS policy for any PAN device is changed, the base station in the uplink direction is requested to the service flow ID for the PAN device whose QoS policy is changed, and the binding table is changed to the service flow ID assigned by the base station. Gateway device for interworking heterogeneous networks, characterized in that the setting. The method of claim 1, The binding module And monitoring the traffic amount of each PAN device, and requesting a connection ID and bandwidth required for the PAN device to an 802.16e MAC block when the monitored traffic amount is greater than an upper reference value or less than a lower reference value. Gateway device interworking network. The method of claim 1, The binding module If a packet is received from an 802.16e MAC block, the PAN ID present in the received packet is extracted, and a downlink packet processing unit for transmitting the received packet to a PAN device corresponding to the extracted PAN ID. Gateway device interoperating heterogeneous networks characterized by. The method of claim 1, The binding module A packet generator configured to generate an IP packet having an IP address corresponding to an ID of a PAN device transmitting the packet as a source address when a packet is received from an arbitrary PAN device; And And an uplink packet processing unit for transmitting a connection ID, a service flow ID, and the generated IP packet to an 802.16e MAC block with reference to the binding table. Gateway device interworking network. When the PAN device is initialized, an IP address is allocated for each ID of the PAN device and stored in an IP map table, and a relationship between a connection ID for bandwidth setting and a service flow ID for QoS policy setting is determined for each PAN device ID. Storing in a table; Requesting, by the base station in the uplink direction, a connection ID for the PAN device whose bandwidth has changed if the bandwidth for any PAN device has changed; And And setting the binding table with the allocated connection ID when the connection ID for the PAN device whose bandwidth is changed by the base station is allocated. The method of claim 6, If the QoS policy for any PAN device is changed, requesting a base station in the uplink direction for a service flow ID for the PAN device whose QoS policy has been changed; And And setting the binding table with the assigned service flow ID when the service flow ID for the PAN device whose bandwidth has been changed by the base station is further included. The method of claim 6, Requesting the connection ID from the base station in the uplink direction Monitoring the traffic amount for each PAN device, and requesting a connection ID and bandwidth required for the PAN device to an 802.16e MAC block when the monitored traffic amount is greater than an upper reference value or less than a lower reference value. How to interwork heterogeneous networks. The method of claim 6, If a packet is received from the 802.16e MAC block in the uplink direction, extracting a PAN ID present in the received packet; And And transmitting the received packet to a PAN device corresponding to the extracted PAN ID. The method of claim 6, Generating an IP packet having an IP address corresponding to an ID of a PAN device which has transmitted the packet as a source address when a packet is received from an arbitrary PAN device; And And transmitting a connection ID, a service flow ID, and the generated IP packet to an 802.16e MAC block in the uplink direction by referring to the binding table. Interworking heterogeneous networks. A computer-readable recording medium having recorded thereon a program for executing the method of any one of claims 6 to 10.

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