KR20080110958A - Medium access control layer of control apparatus for device combined row rate communications and high rate communications and method for the same - Google Patents

Abstract

A control device of a media access control layer at device and a method thereof are provided to improve the quality of a service and to control bandwidth by individual section communication network. A map table(311) stores the information assigning the information provider address according to the private section network identification. A link module(314) allocates a flow identifier about QoS and sets up the link table(314). A link table(312) stores relation between flow identifiers for setting up service quality policy with connection identifier for setting up the bandwidth by individual section communication network.

Description

Medium access control layer of control apparatus for device combined row rate communications and high rate communications and Method for the same

1 is a block diagram showing the configuration of a communication network according to an embodiment of the present invention.

FIG. 2 is a block diagram illustrating a detailed configuration of the gateway of FIG. 1.

3 is a block diagram showing a detailed configuration of the link block of FIG.

4 is a flowchart illustrating a method of controlling a media access control layer according to an embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

310: link block 311: map table

312 link table 314 link module

The present invention provides a device and method for controlling a medium access control layer in a device in which the functions of the low speed communication network and the high speed communication network are combined, and more particularly, in a device in which the functions of the low speed communication network and the high speed communication network are combined, The apparatus and method for controlling the media access control layer in a device that combines the functions of a low speed communication network and a high speed communication network to control bandwidth or provide quality of service for each personal area network by efficiently controlling the media access control layer according to the increase and decrease. It is about.

Conventional low speed communication networks constitute a personal area network (PAN) to transmit and receive low speed data to configure a personal area communication network. High-speed network is EV1 (1x Evolution-Data Optimized) Rev. The base station of A is configured to transmit and receive high-speed data to form a broadband communication network.

The low speed network uses devices of 802.15.4 MAC / PHY (Low Rate Wireless Personal Area Network (LR-WPAN) LR-WPAN) under the PAN, and the code-division multiple access (CDMA) under the broadband network. ) 1x Evolution-Data Optimized (EVDO) Rev. 2000 A MAC / PHY device is used.

Low speed networks are serviced in the private sector, and high speed networks are being serviced over broadband. Since the low speed communication network is serviced in a private area, data is transmitted and received according to a low data rate, and the high speed communication network supports high speed data transmission while the service area is broadband.

The low speed communication network and the high speed communication network have different data rates, but communication network convergence is required. A device of a low speed communication network and a device of a high speed communication network are fused with each other and demand a technology of connecting a device of a low speed communication network to a high speed communication network.

However, the control apparatus of the conventional media access control layer has a problem that the bandwidth is low and the service quality is low because the node of the low speed communication network is increased or decreased.

Therefore, the first technical problem to be achieved by the present invention is to control the bandwidth for each personal area network by controlling the medium access control layer efficiently and directly as the nodes of the low speed communication network increase and decrease in the device combining the functions of the low speed communication network and the high speed communication network. The present invention provides a control apparatus of a media access control layer in a device in which a function of a high speed communication network and a low speed communication network providing a quality of service is combined.

A second technical problem to be achieved by the present invention is to provide a control method of a media access control layer in a device in which the functions of a low speed communication network and a high speed communication network are combined.

In order to achieve the first technical problem, the present invention, a map table for storing the information allocated to the IP address for each PAN ID in the initialization process of the LR-WPAN; Based on pre-prepared information on the bandwidth and quality of service policy of the corresponding PAN of the LR-WPAN, a connection ID for the PAN ID is allocated from the base station, the bandwidth is set, and the flow ID for the quality of service is set, and the link table is set. A link module; And a link table for storing a relationship between a connection ID for bandwidth setting and a flow ID for setting a quality of service policy for each PAN ID. To provide.

In order to achieve the second technical problem, the present invention provides a link module that communicates with an EVDO Rev. A MAC block and a PAN device, the initialization step of initializing a PAN device and allocating one IP per PAN ID in an IP pool; Changing the bandwidth or quality of service policy for the PAN ID; Requesting a flow ID and a connection ID corresponding to the PAN ID from the EVDO Rev. A MAC block, obtaining a connection ID from the base station, and storing the connection ID in a link table; Transmitting a setting value change message of a quality of service for each flow ID or connection ID to the EVDO Rev. A MAC block; And a completion step of notifying the PAN device that the link entry has been set up.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

However, embodiments of the present invention illustrated below may be modified in various other forms, and the scope of the present invention is not limited to the embodiments described below. Embodiments of the invention are provided to more fully illustrate the invention to those skilled in the art.

1 is a block diagram showing the configuration of a communication network according to an embodiment of the present invention.

Referring to FIG. 1, a subscriber station function is provided to be connected to 1x Evolution-Data Optimized (EVDO) Rev.A (e.g., EVDO Rev.A).

Multiple PANs (Personal Area Networks, hereinafter referred to as PANs) between the Gateway 300 and LR-WPANs (Low Rate Wireless Personal Area Networks, hereinafter referred to as LR-WPANs). Can have Gateway 300 communicates with sensor nodes of LR-WPAN 400 via a downlink direction. The gateway 300 assigns one PAN ID to each of the PANs 401, 402, and 40N in the LR-WPAN 400. The gateway 300 includes a full function device (FFD) that performs a PAN coordinator function. The gateway 300 performs a function of integrated management of all sensor nodes in the PAN.

There may be several PANs between the gateway 300 and the LR-WPAN 400. That is, there are PAN devices having several PAN IDs. The gateway 300 and the sensor nodes are configured in a star topology.

FIG. 2 shows a block diagram of a detailed configuration of the gateway of FIG. 1.

In FIG. 2, 802.15.4 MAC / PHY 322/324 refers to a PAN device.

The gateway includes an EVDO Rev. A MAC 321 block, an 802.15.4 MAC 322 block of a PAN device, a link block 310, a network layer 325, middleware 326, and an application layer 327.

The link block 310 connects the EVDO Rev. A MAC 321 block and the PAN device. The network layer 325 operates a network layer on the basis of the connection between the EVDO Rev. A MAC 321 block of the link block and the PAN device. The middleware 326 and the application layer 327 operate the application based on the service of the network layer 327.

3 is a block diagram showing a detailed configuration of the link block of FIG.

In FIG. 3, the link block 310 is composed of a link module 314, a link table 312 and a map table 311.

The link table 312 stores a relationship between a connection ID for bandwidth setting and a flow ID for setting a quality of service policy for each PAN ID.

In order to transfer data between the base station of EVDO Rev.A and the gateway in the link table 312, the base station first generates one connection ID for one PAN ID. When the LR-WPAN completes network initialization, the gateway requests the EVDO Rev.A MAC 321 block to obtain the connection ID and flow ID in the uplink direction according to the bandwidth and quality of service requirements set in advance for each PAN ID. Store in the link table. Link table 312 stores information about bandwidth and quality of service in bandwidth / quality of service database 313.

The structure of the link table 312 is as follows.

property size Contents PAN ID 16 bit The PAN ID is used by the device. Connection ID 16 bit The connection ID uniquely defines the service flow between the gateway and the base station. Flow ID 32 bit The flow ID defines the connection to the same peer in the media access control layer of the base station and gateway. The flow ID defines the quality of service parameters of the flow associated with the connection.

The map table 311 stores information in which an IP address is allocated for each PAN ID.

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

The structure of the map table 311 is as follows.

property size Contents PAN ID 16 bit The PAN ID is used by the device. IP address 32 bit The IP address is unique for each PAN ID. In the future, it will be extended to 128 bits for IPv6.

The link module 314 allocates the connection ID for the PAN ID from the base station, sets the bandwidth, and assigns the flow ID for the quality of service based on the prepared information on the bandwidth and the quality of service policy of the corresponding PAN of the LR-WPAN. The link table 312 is set.

The initialization unit of the link module 314 allocates and initializes the memory of the link table 312 and the map table 311. The initialization unit of the link module 314 releases the memory of the link table 312 and the map table 311.

The initialization unit of the link module 314 initializes the PAN device, allocates one IP for each PAN ID from the IP pool, and requests the EVDO Rev.A MAC 321 block to request a flow ID and connection ID corresponding to the PAN ID to link. Save to a table. That is, the initialization unit of the link module 314 obtains an IP address for a specific PAN ID and stores the IP address and the PAN ID. The initialization unit of the link module 314 requests the connection ID and the flow ID from the EVDO Rev. A MAC 321 block and stores the obtained connection ID and the flow ID in the link table.

The traffic coordinator of the link module 314 monitors the amount of traffic per PAN, and if there is more traffic than the upper reference value or less traffic than the lower reference value, it is appropriate to the EVDO Rev.A MAC 321 block together with the connection ID corresponding to the PAN ID. Request bandwidth.

The change message transfer unit of the link module 314 transmits a setting value change message of the quality of service for each flow ID or connection ID to the EVDO Rev.A MAC 321 block.

The downlink unit of the link module 314 finds a PAN ID already present in the packet transmitted from the EVDO Rev.A MAC 321 block, and directly transfers the PAN device to the corresponding PAN device.

The uplink portion of the link module 314 receives the packet from any PAN when processing the uplink packet and processes it as follows. The uplink unit of the link module 314 refers to the map table 311 to generate an IP packet whose source address is the IP address corresponding to the PAN ID. The uplink unit of the link module 314 transmits an IP packet to the EVDO Rev. A MAC 321 block along with the connection ID and flow ID corresponding to the PAN ID by referring to the link table 312. The EVDO Rev. A MAC 321 block generates the EVDO Rev. A MAC frame and transmits the value received from the link module 314 to the base station.

4 is a flowchart illustrating a method of controlling a media access control layer according to an embodiment of the present invention. In FIG. 4, the 802.15.4 MAC refers to a PAN device.

The link module stores a link table for storing a relationship between a connection ID for bandwidth setting and a flow ID for setting a quality of service policy for each PAN ID, and a map for storing IP address-specific information for each PAN ID during LR-WPAN initialization. Allocate and initialize table memory.

The link module initializes the PAN device represented by the 802.15.4 MAC and allocates one IP per PAN ID in the IP pool.

The link module changes the bandwidth or quality of service policy for the PAN ID assigned to the PAN device (S101). The link module adjusts the bandwidth setting and the quality of service policy by changing the bandwidth or quality of service policy for the PAN ID.

The link module receives a PAN initialization complete message from the PAN device (S102).

The link module requests a flow ID and a connection ID corresponding to the PAN ID from the EVDO Rev. A MAC block (S103). The link module obtains a connection ID from the base station (S104). The link module allocates the connection ID for the PAN ID from the base station, sets the bandwidth, and stores the obtained connection ID in the link table (S105).

The link module transmits a configuration value change message of the quality of service to each EVID or a connection ID to the EVDO Rev.A MAC block.

The link module informs the PAN device that the link entry is completed (S106).

The link module monitors the traffic amount per PAN. If there is more traffic than the upper reference value or less than the lower reference value, the link module requests the appropriate bandwidth from the EVDO Rev.A MAC block together with the connection ID corresponding to the PAN ID.

The link module finds a PAN ID that already exists in the packet transmitted from the EVDO Rev.A MAC block and delivers it directly to the corresponding PAN device.

The link module creates an IP packet whose source address is the IP address corresponding to the PAN ID by referring to the map table, and sends the IP packet along with the connection ID and flow ID corresponding to the PAN ID by referring to the link table. The EVDO Rev.A MAC block transmits the value received from the link module to the base station by creating an EVDO Rev.A MAC frame.

The present invention can be embodied as code that can be read by a computer (including all devices having an information processing function) in a computer-readable recording medium.

The computer-readable recording medium includes all kinds of recording devices in which data is stored which can be read by a computer system. Examples of computer-readable recording devices include ROM, RAM, CD-ROM, magnetic tape, floppy 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 the embodiments shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. Therefore, the true technical protection scope of the present invention will be defined by the technical details of the appended claims.

As described above, according to the present invention, a WPAN network is used by using a function of providing quality of service and bandwidth differentiated by connection ID in a media access control layer between a gateway and a base station, and connecting the connection ID with one PAN ID. In the uplink stream delivered to the backbone network in the effect that it is possible to enable efficient communication without the help of a higher layer.

The present invention has the effect of efficiently using the bandwidth of the EVDO Rev.A backbone network by directly controlling the bandwidth required for each PAN according to the increase and decrease of the sensor node of the LR-WPAN network in the media access control layer.

The present invention has an effect of efficiently distributing resources between a base station and a gateway of an EVDO network connected to a WPAN by different service quality policies required for each PAN, and receiving differentiated services for each PAN unit.

The gateway according to the present invention receives the packet from the base station, finds the connection ID and the PAN ID in the link table, and delivers the packet directly in the media access control layer, thereby eliminating an overhead such as a layer 3 IP lookup.

The present invention has an effect of more efficiently delivering an IP packet in an ALL IP environment by creating and using an IP packet as a source IP address using a value of a map table for an uplink stream.

Claims (10)

A map table for storing information in which IP addresses are allocated for respective personal area network identifiers during the initialization of the low speed wireless personal area network; On the basis of the prepared information on the bandwidth and the quality of service policy of the corresponding personal area network of the low speed wireless personal area network, a connection identifier for the personal area network identifier is allocated from the base station and the bandwidth is set. A link module for receiving the link and setting the link table; And Control of a medium access control layer in a device that combines the functions of a low-speed network and a high-speed network including a link table for storing a relationship between a connection identifier for bandwidth setting and a flow identifier for setting a quality of service policy for each personal area network identifier Device. The method of claim 1, The link module, Initializes the personal area network device, allocates one IP for each personal area network identifier in the IP pool, requests an EVDO block for a flow identifier and connection identifier corresponding to the personal area network identifier, and stores the ID in the link table. An initialization unit; And A medium access control layer in a device in which a function of a low speed communication network and a high speed communication network is combined, further comprising a change message transfer unit for transmitting a setting value change message of a quality of service to each eBudio block for each flow identifier or connection identifier. Control device. The method of claim 1, The link module, A traffic controller for monitoring an amount of traffic for each personal area network and requesting an appropriate bandwidth from an eBio block with a connection identifier corresponding to the personal area network identifier when the traffic amount is higher than the upper reference value or the traffic is lower than the lower reference value; A downlink unit that finds a personal area network identifier already existing in the packet transmitted from the eBudio block and directly delivers the personal area network device to the corresponding personal area network device; And By referring to the map table, an IP packet having an IP address corresponding to the personal area network identifier as a source address is created, and the IP packet is combined with a connection identifier and a flow identifier corresponding to the personal area network identifier with reference to a link table. And an uplink unit configured to transmit a block received from the link module to a base station to transmit a value received from the link module to the base station. Control device in the access control layer. An initialization unit for initializing the personal area network device, allocating an IP for each personal area network identifier in the IP pool, and requesting an eBudio block for a flow identifier and a connection identifier corresponding to the personal area b network identifier and storing it in a link table; A change message transfer unit for transmitting a setting value change message of a quality of service for each flow identifier or connection identifier to the eBudio block; A traffic controller for monitoring an amount of traffic for each personal area network and requesting an appropriate bandwidth from the iBio block with a connection identifier corresponding to the personal area network identifier when the traffic amount is higher than the upper reference value or the traffic is lower than the lower reference value; A downlink unit that finds a personal area network identifier already existing in the packet transmitted from the eBudio block and directly delivers the personal area network device to the corresponding personal area network device; And Refer to the map table to create an IP packet having an IP address corresponding to the personal area network identifier as a source address, and refer to the link table to display the IP packet together with a connection identifier and a flow identifier corresponding to the personal area network identifier. In the device coupled to the low-speed communication network and the high-speed communication network, characterized in that it comprises a uplink unit for transmitting to the base station to create a video frame and transmits the value received from the link module to the block Control device in the media access control layer. A link module that communicates with an eBudio block and a personal area network device, Initializing the personal area network device and allocating one IP for each personal area network identifier in the IP pool; Changing a bandwidth or quality of service policy for the personal area network identifier; Requesting the eBudio block for a flow identifier and a connection identifier corresponding to a personal area network identifier, obtaining a connection identifier from a base station, and storing the connection identifier in a link table; Transmitting a setting value change message of a quality of service for each flow identifier or connection identifier to the eBudio block; And And a completion step of informing the personal area network device that the link entry has been set up. The method of claim 5, wherein The initialization step, Allocating and initializing memory of the link table and the map table; And And receiving a personal area network initialization complete message from the personal area network device. The method of claim 5, wherein After the completion step, Monitoring the traffic amount for each personal area network and requesting an appropriate bandwidth from the iBio block with a connection identifier corresponding to the personal area network identifier when the traffic amount is higher than the upper reference value or less than the lower reference value; Finding a personal area network identifier already present in the packet transferred from the eBudio block and directly forwarding to the corresponding personal area network device; And By referring to the map table, an IP packet having an IP address corresponding to the personal area network identifier as a source address is created, and the IP packet is stored together with a connection identifier and a flow identifier corresponding to the personal area network identifier by referring to the link table. And the iBudio block comprises transmitting a value received from the link module to a base station by making an iVioD frame to the base station. How to control the hierarchy. A link module that communicates with an eBudio block and a personal area network device, Allocating and initializing memory of the link table and the map table; Receiving a personal area network initialization complete message from a personal area network device; Initializing the personal area network device and allocating an IP for each personal area network identifier in the IP pool; Changing a bandwidth or quality of service policy for the personal area network identifier; Requesting, from the base station, a flow identifier and a connection identifier corresponding to the personal area network identifier, obtaining a connection identifier from a base station and storing the connection identifier in a link table; Transmitting a setting value change message of a quality of service for each flow identifier or connection identifier to the eBudio block; And And a completion step of informing the personal area network device that the link entry has been set up. The method of claim 8, After the completion step, Monitoring the traffic amount for each personal area network and requesting an appropriate bandwidth from the eBudio block with a connection identifier corresponding to the personal area network identifier when the traffic amount is higher than the upper reference value or the traffic is lower than the lower reference value; Finding a personal area network identifier already present in the packet transferred from the eBudio block and directly forwarding to the corresponding personal area network device; And By referring to the map table, an IP packet having an IP address corresponding to the personal area network identifier as a source address is created, and the IP packet is stored together with a connection identifier and a flow identifier corresponding to the personal area network identifier by referring to the link table. And the iBudio block comprises transmitting a value received from the link module to a base station by making an iVioD frame to the base station. How to control the hierarchy. A computer-readable recording medium having recorded thereon a program for executing the method of any one of claims 5 to 9.

Images