KR100541645B1 - System and method for relaying data in coordinator-based wireless network - Google Patents

Abstract

The present invention relates to a data relay in a coordinator-based wireless network. The data relay apparatus according to the embodiment of the present invention includes a transceiver for receiving a packet for requesting channel time allocation for data transmission, and data from the packet. And extracting relay information indicating whether to relay and allocating a channel time according to the relay information.

Wireless Personal Area Network (WPAN), IEEE802.15.3, piconet

Description

System and method for relaying data in coordinator-based wireless network in coordinator based wireless network

1 is an exemplary diagram illustrating a wireless network system in an infrastructure mode.

2 is an exemplary diagram illustrating a wireless network system in an ad hoc mode.

3 is an exemplary diagram illustrating a coordinator based wireless network.

4 is an exemplary view showing a piconet according to an embodiment of the present invention.

5 is a structural diagram illustrating a frame structure of a command for requesting channel time allocation according to an embodiment of the present invention.

6 is a structural diagram showing a header of a MAC frame according to an embodiment of the present invention.

7 is a structural diagram illustrating a message structure for generating a command for requesting channel time allocation according to an embodiment of the present invention.

8 is a block diagram showing the configuration of a device and a PNC in an embodiment of the present invention.

9 is a flowchart illustrating a data communication method using one channel time according to an embodiment of the present invention.

10 is a process flowchart showing a data communication method using one channel time according to another embodiment of the present invention.

11 is a process flowchart showing a data communication method using two channel times according to an embodiment of the present invention.

12 is a state block diagram according to another embodiment of the present invention.

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

800: device

810: device controller

820: device transceiver

850: PNC

860: PNC transceiver

870: PNC control unit

880: relay information determination unit

890: packet converter

The present invention relates to data relay, and more particularly, to a method in which a coordinator relays data in a coordinator-based wireless network.

With the development of communication and network technology, the recent network environment is changing from a wired network environment using a wired medium such as a coaxial cable or an optical cable to a wireless network environment using wireless signals of various frequency bands. Accordingly, computing devices (hereinafter, referred to as 'wireless network devices') that include a wireless network interface module, are capable of mobility, and perform various functions by processing various information have been developed. Wireless network technologies are emerging for devices to communicate efficiently.

Wireless networks can be divided into two types.

First, as shown in FIG. 1, a wireless network including an access point is also referred to as an 'infrastructure mode wireless network'.

In another embodiment, as shown in FIG. 2, a wireless network that does not include an access point is also referred to as an "ad-hoc mode wireless network."

In an infrastructure mode wireless network, an access point plays a role of relaying data in order to connect a wireless network to a wired network or to communicate between wireless network devices belonging to the wireless network. Therefore, all data must go through the access point.

A wireless network in an ad hoc mode is a form in which wireless network devices belonging to a single wireless network directly transmit and receive data to each other without passing through a relay device such as an access point.

This type of network can be divided into two types. The time when a randomly selected wireless network device among wireless network devices belonging to a single wireless network can transmit data to other wireless network devices (hereinafter, referred to as' channel time (channel) and other wireless network devices to transmit data only during a predetermined channel time, and a wireless network serving as a coordinator as described above. There is no device, and there is a form of network in which all network devices can transmit data whenever they want.

In this case, in the former case, that is, a network form in which a wireless network device acting as a coordinator (hereinafter, referred to as a 'coordinator-based wireless network') forms a single wireless network centered on the coordinator, and has a predetermined space. When there are multiple coordinator based wireless networks in the network, each coordinator based wireless network has unique identification information to distinguish it from other coordinator based wireless networks.

3 is an exemplary diagram illustrating a coordinator based wireless network.

In a coordinator-based wireless network, a coordinator allocates channel time at the request of a wireless network device to transmit data so that data can be transmitted and received between wireless network devices belonging to the same wireless network, or the wireless network to which the coordinator belongs. Or broadcasts information about wireless network devices belonging to the wireless network.

At this time, the wireless network devices that transmit and receive data directly transmit and receive data during the allocated channel time without passing through the coordinator. Therefore, in order for data to be transmitted and received between wireless network devices, the wireless network device that transmits data, the wireless network device that receives data, and the coordinator must all exist within an effective propagation distance.

For example, in the coordinator-based wireless network 300 illustrated in FIG. 3, it is assumed that the radio wave reaching distance of the wireless network devices 320, 330, and 340 including the coordinator 310 is 10 m in radius.

At this time, when the wireless network device-1 320 attempts to transmit data to the wireless network device-2 330, the wireless network device-1 320 first receives the coordinator 310 from the coordinator 310. 330 needs to be allocated a channel time for transmitting information and data. The wireless network device-1 320 then transmits data to the wireless network device-2 330 during the assigned channel time. This operation is possible because the coordinator 310 and the wireless network device-1 320, the coordinator 310 and the wireless network device-2 330, the wireless network device-1 320 and the wireless This is because network devices-2 330 are each within a valid propagation distance.

However, if the wireless network device-1 320 attempts to transmit data to the wireless network device-3 340, a problem arises.

The wireless network device-1 320 may receive information about the wireless network device-3 340 from the coordinator 310 and may be assigned a channel time. However, when the wireless network device-1 320 intends to transmit data to the wireless network device-3 340, the distance between the wireless network device-1 320 and the wireless network device-3 340. Exceeds 10 m, which is a valid radio wave reach distance, the wireless network device-1 320 cannot transmit data to the wireless network device-3 340.

That is, due to the limitation of the radio propagation distance, the wireless network devices belonging to the coordinator-based wireless network may not be able to communicate while recognizing each other's existence.

Therefore, by overcoming these problems, there is a need for a mechanism capable of communicating with each other between wireless network devices belonging to a single coordinator-based wireless network, even if the radio propagation distance is limited.

The present invention has been made to solve the above problems, in the coordinator-based wireless network, by allowing the coordinator to act as a relay of data transmission, it is possible to transmit and receive data between all wireless network devices belonging to the coordinator-based wireless network. The goal is to provide a way to do this.

The objects of the present invention are not limited to the above-mentioned objects, and other objects that are not mentioned will be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, in the coordinator-based wireless network, a data transmission apparatus according to an embodiment of the present invention, a control unit for generating a packet requesting channel time allocation for data transmission, and transmits the generated packet to the coordinator And a transceiver, wherein the packet includes relay information for allowing the coordinator to relay the data.

In addition, in order to achieve the above object, in the coordinator-based wireless network, a data relay device according to an embodiment of the present invention includes a transceiver for receiving a packet requesting channel time allocation for data transmission, and relaying data from the packet. And a control unit for extracting relay information indicating whether or not to allocate channel information according to the relay information.

In addition, in order to achieve the above object, in the coordinator-based wireless network, a data relay device according to an embodiment of the present invention is a transceiver for receiving a data packet during a channel time allocated for data transmission, and relays data from the packet. Extracting relay information indicating whether or not, and transmitting the received packet to another network device through the transceiver during the channel time according to the relay information.

In addition, in order to achieve the above object, in the coordinator-based wireless network, the data relay device according to the embodiment of the present invention and the transceiver for receiving the data packet during the first channel time allocated for data transmission, and storing the data Extracts relay information indicating whether to relay data from the packet, and stores a packet including data stored in the storage unit during a second channel time according to the relay information through the transceiver; The control unit to transmit to.

In addition, in order to achieve the above object, in the coordinator-based wireless network, the data relay method according to the embodiment of the present invention includes relay information indicating whether the data transmission apparatus relays data during the channel time allocated for data transmission. Transmitting the data packet, receiving the data packet by the data relay device, extracting the relay information from the received packet by the data relay device, and transmitting the relay information by the data relay device. And transmitting the received packet to another network device during the channel time.

In addition, in order to achieve the above object, in the coordinator-based wireless network, the data relay method according to the embodiment of the present invention is relay information indicating whether the data transmission apparatus relays data during the first channel time allocated for data transmission. Transmitting a data packet comprising a; receiving the data packet by the data relay device; storing the data by the data relay device; and relaying the received data from the received packet by the data relay device. Extracting information and transmitting, by the data relay device, a packet including the stored data to another network device during a second channel time according to the relay information.

In addition, in order to achieve the above object, in the coordinator-based wireless network, a data relay method according to the embodiment of the present invention, in the coordinator-based wireless network, transmitting a data packet to a receiving device, and a response to the data packet; And if the packet has not been received, sending the data packet to the coordinator, the information further comprising requesting to transmit the data packet to the receiving device when transmitting the data packet to the coordinator.

Specific details of other embodiments are included in the detailed description and the drawings.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but can be implemented in various different forms, and only the embodiments make the disclosure of the present invention complete, and those of ordinary skill in the art to which the present invention belongs. It is provided to fully inform the person having the scope of the invention, which is defined only by the scope of the claims. Like reference numerals refer to like elements throughout.

Hereinafter, the present invention will be described with reference to the drawings for a system for relaying data and a method for relaying data according to embodiments of the present invention. At this point, it will be understood that each block of the flowchart illustrations and combinations of flowchart illustrations may be performed by computer program instructions. Since these computer program instructions may be mounted on a processor of a general purpose computer, special purpose computer, or other programmable data processing equipment, those instructions executed through the processor of the computer or other programmable data processing equipment may be described in flow chart block (s). The instrument may be adapted to create means for performing the functions. These computer program instructions may be stored in a computer usable or computer readable memory that can be directed to a computer or other programmable data processing equipment to implement functionality in a particular manner, and thus the computer usable or computer readable memory. It is also possible for the instructions stored in to produce an article of manufacture containing instruction means for performing the functions described in the flowchart block (s). Computer program instructions It is also possible to mount on a computer or other programmable data processing equipment, so that a series of operating steps are performed on the computer or other programmable data processing equipment to create a computer-implemented process to perform the computer or other programmable data processing equipment. It is also possible for the instructions to provide steps for performing the functions described in the flowchart block (s).

The Institute of Electrical and Electronics Engineers (IEEE) 802.15.3, on the other hand, discusses Open System Interconnection (OSI) on network models published by the International Standards Institute (ISO) for wireless networks. Standards are proposed for the PHY layer corresponding to the physical layer and the MAC layer for the data-link layer of the layer.

Accordingly, in order to more easily understand the present invention, hereinafter, a wireless personal area network (hereinafter referred to as 'WPAN') compliant with the IEEE802.15.3 standard as an embodiment of the coordinator-based wireless network will be described. Listen and explain. The IEEE802.15.3 standard described as an embodiment of the present invention is based on 'Draft P802.15.3 / D17' published in February 2003.

In WPAN, a wireless network device is referred to as a device, and a single network formed by at least one or more device (s) is called a piconet. Use terminology. In addition, the piconet can be identified from other piconets by piconet identification information that can distinguish the piconet.

In addition, a device serving as a coordinator may be selected among devices belonging to one piconet. In the WPAN, a device serving as a coordinator is referred to as a 'Piconet coordinator' and hereinafter referred to as a 'PNC'.

4 is an exemplary diagram illustrating a piconet according to an embodiment of the present invention, wherein the piconet 400 includes three devices 420, 430, and 440 around the PNC 410, and a PNC 410. ) And propagation reach of each of the devices 420, 430, and 440 is 10 m.

In FIG. 4, the device- 1 420 requests the PNC 410 for information on devices belonging to the piconet 400, and receives a response packet for the request from the PNC 410. This process may be performed for the 'PNC information request' command and the 'PNC information' command of the IEEE802.15.3 standard.

The device-1 420 extracts information of a device (hereinafter, referred to as an "objective device") to transmit data from the response packet, and uses the extracted information to propagate a target device to communicate with itself. A packet requesting a response (hereinafter, referred to as a radio wave arrival request packet) is transmitted to the target device in order to know whether it exists in the reach distance. If the device-1420 receives a response packet from the target device, the device-1420 may transmit data directly to the target device. However, if the device- 1 420 does not receive a response packet from the target device, it means that the target device is located outside the radio wave arrival distance from the device- 1 420. Data cannot be transferred directly to the target device.

This process may be performed for the 'Probe request' command and the 'PNC response' command of the IEEE802.15.3 standard.

For example, when the target device is the device-2 430 illustrated in FIG. 4, the device-1 420 may directly transmit data to the device-2 430. However, the target device may be a device-. In the case of 2 440, the device-1 420 may not directly transmit data to the device-3 440, but may transmit data via the PNC 410.

Accordingly, the device- 1 420 is allocated a channel time for transmitting data to the target device, or information on whether the data should pass through the PNC 410 while transmitting data during the allocated channel time (hereinafter, 'Relay information') should be informed to the PNC 410. The PNC 410 determines whether it should act as a relay for data transmission from the relay information.

If the target device is the device-3 440, the PNC 410 should play a relay role, so that the data transmitted from the device-1420 may be transferred to the device-3 via the PNC 410. 440).

5 to 7 are structural diagrams illustrating a frame structure according to an embodiment of the present invention, and define a frame structure including the relay information. By using such frame structures, the mechanism described in FIG. 4 may be performed. .

On the other hand, in order to facilitate the description of the present invention, the following frame structure conforming to the IEEE802.15.3 standard will be applied.

The relay information may be included in a command for the device-1420 to request a channel time allocation to the PNC 410 and a message for generating the command in the device-1420. At this time, in using the IEEE802.15.3 standard, the command follows the 'channel time request command' format, and the message follows the 'MLME-CREATE-STREAM.request' format. In addition, when the device-1 420 transmits a 'channel time request command' to the PNC 410, the relay information may also be included in a header of a MAC frame.

FIG. 5 is a structural diagram showing a frame structure of a command for requesting channel time allocation according to an embodiment of the present invention. The channel time request command 500 is a channel time as shown in FIG. A plurality of channel time request blocks 510 are assembled. In addition, a 1-bit 'Rervered' region exists in the 'CTRq control' information field of the channel time request block 510. By defining this area as a 'Relay_Req' area (520), it is possible to know whether the PNC 410 should act as a data transmission relay.

6 is a structural diagram showing a header of a MAC frame according to an embodiment of the present invention.

The header 600 includes a 'Frame control' information field 610 including control information of the MAC frame, and a 'PNID (Piconet Identifier)' information field 620 indicating an identifier for identifying a piconet. And a 'SrcID' information field 630 for identifying a device transmitting the MAC frame, and a 'DestID' information field for identifying a target device for receiving the MAC frame 640. ). In addition, the 'Frame control' information field 610 has a size of 2 bytes. In the conventional IEEE802.15.3 standard, the 'b11' area, which is defined as the 'Reserved' area, indicates 'relay information' for implementing the present invention. Relay_frame 'area 650. For example, when the 'Relay_frame' information is 1, the MAC frame including the header should be relayed by the PNC. When the 'Relay_frame' information is 0, the MAC frame including the header is determined by the PNC. Indicates that it is not relayed. Accordingly, the PNC decides whether to relay the received frame based on the 'Relay_frame' information.

7 is a structural diagram illustrating a message structure for generating a command for requesting channel time allocation according to an embodiment of the present invention.

In order for the device-1420 to send a command for requesting channel time allocation to the PNC 410, a message for generating the command inside the device-1420 is called. That is, the information included in the called message is included in a command for requesting the channel time allocation and transmitted to the PNC 410. Therefore, relay information must also be included in the message format.

In this case, in using the IEEE 802.15.3 standard, the message format corresponds to 'MLME-CREATE-STREAM.request', and a structure in which relay information is added thereto is illustrated in FIG. 7. Here, the relay information is a 'RelayReq' parameter expressed in italics. Preferably, the data type of the 'RelayReq' parameter is boolean. For example, when the value of the 'RelayReq' parameter is 'TRUE', it indicates that the PNC is requested to relay data, and when the value of the 'RelayReq' parameter is 'FALSE', the PNC Indicates that there is no need to act as a data relay.

In this manner, the structure of the 'MLME-MODIFY-STREAM.request' message defined in the IEEE802.15.3 standard can be modified.

8 is a block diagram showing the configuration of a device and a PNC in an embodiment of the present invention.

The PCN 850 receives a PNC transceiver 860 that transmits and receives a wireless packet to and from the device-1 800 and the device 289 through a piconet, and receives a radio packet received by the PNC transceiver 860. The relay information determination unit 880 may determine whether to relay data from the relay information included in the radio packet, and when the PNC 850 needs to relay data, the MAC frame information may be partially modified to perform the radio. A packet converter 890 for reconstructing a packet; a PNC controller 870 for managing a process occurring between the PNC transceiver 860, the relay information determination unit 880, and the packet converter 890; Include.

The device- 1800 includes a device controller 810 for generating a wireless packet including a header of a MAC frame, and a transceiver 820 for transmitting the generated wireless packet. In addition, the structure of the device-2895 follows the structure of the device-1800.

On the other hand, PNC is a kind of device because it is selected from at least one device. Therefore, although the PNC and the device may be regarded as the same in configuration, the device-1 800 and the PNC 850 are functionally divided in FIG. 8 to explain the present invention more easily. That is, the PNC controller 870, the relay information determination unit 880, and the packet converter 890 may be implemented as a single integrated circuit chip, which is a device in the device-1800. It corresponds to the control unit 810.

Hereinafter, the operation between the PNC 850 and the device- 1800 will be described in detail.

It is assumed that the device- 1800 discovers the device-2 895 which belongs to the same piconet as its own but cannot directly transmit data through the mechanism described in FIG.

When the device-1800 attempts to transmit data to the device-2895, first, a channel time should be allocated to the PNC 850, so that the device controller 810 internally shows the channel shown in FIG. Call MLME-CREATE-STREAM.request. At this time, since the PNC 850 needs to relay data, it sets a 'RelayReq' parameter that requests the relay of the PNC 850. Then, the device-1 800 converts the called MLME-CREATE-STREAM.request message into a channel time request command shown in FIG. 5 through the device transceiver 820. Transmit to PNC 850. At this time, 'Relay_Req' information 520 shown in FIG. 5 and 'Relay_frame' information 620 shown in FIG. 6 are set.

The PNC transceiver 860 of the PNC 850 receives a channel time request command transmitted from the device-1800, and the relay information determination unit 880 transmits the 'Relay_Req'. The information 520 and the 'Relay_frame' information 620 are extracted to know that the PNC 850 itself should serve as a data relay. The PNC controller 870 allocates a channel time for the device- 1800 to transmit data.

The device- 1800 transmits a data packet to the PNC 850 during the allocated channel time. At this time, the 'Relay_frame' information 620 shown in FIG. 6 is set and the MAC frame header 600 is set. ) Sets the 'SrcID' information field 640 as the device identification information of the device-1800 and the 'DestID' information field 630 as the device identification information of the PNC 850.

The PNC transceiver 860 of the PNC 850 receives a data packet transmitted from the device-1800, and the relay information determination unit 880 extracts the 'Relay_frame' information 620 to PNC. (850) Confirm that he must act as a data relay. In order for the PNC 850 to transmit the data packet received by the PNC 850 to the device 895, the PNC 850 sends the 'SrcID' information field 640 of the MAC frame header 600 illustrated in FIG. 6 to the PNC 850 itself. As the device identification information of, the 'DestID' information field 630 is set as the device identification information of the device-2 895. Such an operation may be performed through the packet converter 890. The data received from the device-1800 while the converter 890 is operating may be stored in a separate storage module (not shown). That is, the data packet received by the PNC 850 may be transmitted to the device-2895 as it is, and when the information of the MAC frame header 600 needs to be changed, the information required by the packet converter 890 is required. It is also possible to set and transmit the changed packet to the device-2 (895). In this case, preferably, one channel time is allocated between the device-1 800 and the device-2895 via the PNC 850 in the former case, and the device- in the latter case. Each channel time is allocated between 1 (800) and the PNC (850) and between the PNC (850) and the device-2 (895) so that two channel times are allocated.

FIG. 9 is a flowchart illustrating a data communication method using one channel time according to an exemplary embodiment of the present invention, wherein the device-1800 indicates 'SrcID' information of the MAC frame header 600 shown in FIG. The field 640 is set as its own device identification information, and the 'DestID' information field 630 is set as the device identification information of the device-2 895.

Then, the device-1 800 transmits a data packet to the PNC 850, and the PNC 850 transmits the data packet to the device-2 895, and then the device-2 895. Receive an ACK packet. The PNC 850 that receives the ACK packet from the device-2 895 transmits an ACK packet to the device-1800.

Receiving an ACK packet from the PNC 850, the device-1800 transmits a next data packet to the PNC 850.

When following this mechanism, it is necessary to adjust the time information for retransmitting the packet in consideration of the time required for the device-1800 to receive the ACK packet after transmitting the data packet.

FIG. 10 is a flowchart illustrating a data communication method based on one channel time according to another embodiment of the present invention. As in FIG. 9, the device-1 800 is a MAC frame header shown in FIG. 6. The 'SrcID' information field 640 of 600 is set as its own device identification information, and the 'DestID' information field 630 is set as the device identification information of the device-2 895.

The device- 1800 then sends a data packet to the PNC 850. The PNC 850 transmits an ACK packet to the data packet to the device-1800 and transmits the data packet to the device-2895.

Receiving the data packet from the PNC 850, the device-2 895 transmits an ACK packet to the PNC 850. Then, the PNC 850 transmits a packet (hereinafter, referred to as a 'Send_next_frame packet') to request the transmission of the next data packet to the device-1 800, wherein the MAC shown in FIG. The Send_next_frame packet may be defined using a 'Reserved' area or a 'Frame type' area in the 'Frame control' information field 610 of the frame header 600. When the device-1800 receives the Send_next_frame packet, the device-1800 transmits a next data packet to the PNC 850.

11 is a process flowchart showing a data communication method using two channel times according to an embodiment of the present invention.

During the first channel time 1100 allocated between the device-1 800 and the PNC 850, the PNC 850 receives a data packet from the device-1 800.

In this case, the 'SrcID' information field 640 of the MAC frame header 600 illustrated in FIG. 6 is device identification information of the device-1800, and the 'DestID' information field 630 is the PNC 850. Is set to the device identification information.

The PNC 850 that receives the data packet from the device-1 800 transmits an ACK packet to the device-1 800 in response to the received data packet.

Then, the PNC 850 stores the data received from the device-1800 in an arbitrary storage module therein, and when the second channel time 1110 is reached, a data packet including the stored data. Is transmitted to the device-2895. In this case, the 'SrcID' information field 640 of the MAC frame header 600 shown in FIG. 6 is device identification information of the PNC 850, and the 'DestID' information field 630 is device-2895. Is set to the device identification information. The device-289, which has received the data packet from the PNC 850 for the second channel time 1110, transmits an ACK packet to the PNC 850 in response to the received packet.

As in FIG. 9, the device- 1800 uses the 'SrcID' information field 640 of the MAC frame header 600 shown in FIG. 6 as its device identification information, and the 'DestID' information field 630. ) Is set as the device identification information of the device-289.

Meanwhile, in FIG. 4, when the device-1 420 attempts to transmit data to the device-3 440, whether the device-3 440 is at a radio wave reaching distance that can communicate with the device-1 420. To find out whether device-1 420 sends a radio range reach request packet to device-3 440, and if device-1 420 sends the radio range check request packet from device-3 440 If no response packet is received, the device-3 440 determines that the device-3 440 is located outside the radio wave arrival distance. Device-1 420 then forwards the data to device-3 440 to PNC 410 to cause PNC 410 to transmit the data to device-3 440.

However, if device-1 420 transfers data to or during data transfer to PNC 410 or if device-3 440 moves and enters a propagation reach from device-1 420 The device-1 420 may transmit data directly to the device-3 440 without having to transmit data to the device-3 440 via the PNC 410. Accordingly, there is a need for a method for the device-1420 to detect this situation.

In this manner, the device 3 (440) entering the radio wave arrival distance by entering the radio wave arrival distance by transmitting the radio wave arrival distance request request packet not only once but periodically or a predetermined number of times is designated within a predetermined time period. A response packet to the propagation reach confirmation request packet is received, and device-1 420 can then directly transmit data to device-3 440. This process is illustrated in FIG. 12 using a state block diagram.

For example, while the device- 1 420 transmits the radio arrival distance check request packet N times (1210), when the device-1 420 receives a response packet for the packet, the device-1 420 transmits data to the device-3 440 (1250). However, if the device-1420 does not receive a response packet for the radio wave arrival confirmation request packet, the device-1420 may transmit data to the PNC 410 (1230). If the device-1 420 receives a response packet while transmitting data to the PNC 410, the device-1 420 transmits data to the device-3 440 (1250).

The present invention described above is capable of various substitutions, modifications, and changes without departing from the spirit of the present invention for those skilled in the art to which the present invention pertains. It is not limited to drawing.

According to the embodiment of the present invention, there is an effect that data can be transmitted and received between all the wireless network devices belonging to the coordinator-based wireless network with the limitation of the radio wave reach.

Claims (23)

In a coordinator based wireless network, A controller configured to generate a packet for requesting channel time allocation for data transmission; And It includes a transceiver for transmitting the generated packet to the coordinator, And said packet includes relay information for said coordinator to relay said data. The method of claim 1, And the relay information includes relay information whose data type is a Boolean type. The method of claim 1, And said packet comprises a packet generated by a call of a message requesting said channel time. The method of claim 3, The message includes the relay information. The method of claim 4, wherein And the relay information includes relay information whose data type is a Boolean type. The method of claim 1, And said wireless packet comprises a wireless packet conforming to IEEE802.15.3 standard. In a coordinator based wireless network, A transceiver for receiving a packet for requesting channel time allocation for data transmission; And And a control unit for extracting relay information indicating whether to relay data from the packet and allocating a channel time according to the relay information. The method of claim 7, wherein And the relay information includes relay information whose data type is a Boolean type. The method of claim 7, wherein And said wireless packet comprises a wireless packet conforming to IEEE802.15.3 standard. In a coordinator based wireless network, A transceiver for receiving a data packet during a channel time allocated for data transmission; And And a control unit for extracting relay information indicating whether to relay data from the packet, and transmitting the received packet to another network device through the transceiver unit during the channel time according to the relay information. The method of claim 10, And the relay information includes relay information whose data type is a Boolean type. The method of claim 10, And said wireless packet comprises a wireless packet conforming to IEEE802.15.3 standard. In a coordinator based wireless network, A transceiver for receiving a data packet during a first channel time allocated for data transmission; A storage unit for storing the data; And A control unit for extracting relay information indicating whether to relay data from the packet and transmitting a packet including data stored in the storage unit to another network device through the transceiver unit during a second channel time according to the relay information; Data relay device that includes. The method of claim 13, And the relay information includes relay information whose data type is a Boolean type. The method of claim 13, And said wireless packet comprises a wireless packet conforming to IEEE802.15.3 standard. In a coordinator based wireless network, Transmitting a data packet including relay information indicating whether the data transmission device relays data during a channel time allocated for data transmission, to the data relay device; The data relay device receiving the data packet; Extracting, by the data relay device, the relay information from the received packet; And Transmitting, by the data relay device, the received packet to another network device during the channel time according to the relay information. The method of claim 16, And the relay information includes relay information whose data type is a Boolean type. The method of claim 17, And the data packet comprises a data packet conforming to the IEEE802.15.3 standard. In a coordinator based wireless network, Transmitting a data packet including relay information indicating whether the data transmission device relays data during a first channel time allocated for data transmission, to the data relay device; The data relay device receiving the data packet; Storing the data by the data relay device; Extracting, by the data relay device, the relay information from the received packet; And And transmitting, by the data relay device, a packet including the stored data to another network device during a second channel time according to the relay information. The method of claim 19, And the relay information includes relay information whose data type is a Boolean type. The method of claim 19, And the data packet comprises a data packet conforming to the IEEE802.15.3 standard. In a coordinator based wireless network, Sending a data packet to a receiving device; If the response packet for the data packet is not received, transmitting the data packet to the coordinator, wherein the data packet is requested to the receiving device when the data packet is transmitted to the coordinator. Data relay method to include more information. The method of claim 22, And the information includes address information indicating the address of the receiving device and relay request information.

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