KR101449871B1 - System and method for providing ieee 802.15.4 mac protocol using beam antenna mounted on coordinator - Google Patents

Abstract

A method of providing an IEEE 802.15.4 MAC protocol using a multi-beam antenna mounted on a coordinator is a method of providing a continuous duration of a contention access period (CAP) and a duration of a contention free period (CFP) A step for setting a slot unit; Determining, for each slot, a duration of a data packet and a duration of an acknowledgment (ACK) for receiving the data packet; Calculating a ratio between the duration of the data packet and the duration of the response response; And a parallel packet reception (PPR) period and a parallel packet transmission (PPT) period for the duration of the contention access period and the duration of the non-contention period, respectively, based on the calculated ratio .

Description

TECHNICAL FIELD [0001] The present invention relates to a method and system for providing an IEEE 802.15.4 MAC protocol using a multi-beam antenna mounted on a coordinator,

The present invention relates to a system and method for providing an IEEE 802.15.4 MAC protocol using a multi-beam antenna mounted on a coordinator, and more particularly, to a super frame structure of a MAC layer for using a multi- Quot; is defined.

The superframe of the MAC layer includes a Parallel Packet Reception (PPR) period and a Parallel Packet Reception (CPP) period for a duration of a Contention Access Period (CAP) and a duration of a Contention Free Period And includes a Parallel Packet Transmission (PPT) period. At this time, the parallel packet reception period may include the duration of the data packet, and the coordinator may perform the uplink communication for the duration of the data packet. In addition, the parallel packet transmission period may include a duration of an acknowledgment (ACK) for receiving a data packet, and the coordinator may perform downlink communication for a duration of the response response.

The embodiments of the present invention set up the interval of the uplink communication and the period of the downlink communication of the coordinator by setting the parallel packet receiving period and the parallel packet transmitting period for each of the duration of the contention access period and the duration of the non- Method, apparatus, and system.

In addition, embodiments of the present invention provide a method, an apparatus, and a system that use a ratio between a duration of a data packet and a duration of a response response in a process of setting a parallel packet reception period and a parallel packet transmission period.

In addition, embodiments of the present invention provide a method, apparatus, and system for setting a beacon frame based on a set parallel packet reception period and a parallel packet transmission period.

A method for providing an IEEE 802.15.4 MAC protocol using a multi-beam antenna installed in a coordinator according to an embodiment of the present invention includes a duration of a contention access period (CAP) and a period of a contention free period ; CFP) for each slot in units of slots; Determining, for each slot, a duration of a data packet and a duration of an acknowledgment (ACK) for receiving the data packet; Calculating a ratio between the duration of the data packet and the duration of the response response; And a parallel packet reception (PPR) period and a parallel packet transmission (PPT) period for the duration of the contention access period and the duration of the non-contention period, respectively, based on the calculated ratio .

Wherein calculating the ratio between the duration of the data packet and the duration of the response response comprises: obtaining a sum of the duration of the data packet and the duration of the response response, respectively; And setting a ratio between the duration of the data packet and the duration of the response response based on the obtained sum.

The method of providing the IEEE 802.15.4 MAC protocol may further comprise setting a beacon frame based on the set parallel packet reception period and the set parallel packet transmission period.

The method of providing the IEEE 802.15.4 MAC protocol may further comprise setting a frame of the data packet and a frame of the response reply.

A system for providing an IEEE 802.15.4 MAC protocol using a multi-beam antenna installed in a coordinator according to an embodiment of the present invention includes a memory unit for recording a program operating in the coordinator; And a processor for controlling the operation of the coordinator according to the program recorded in the memory unit, wherein the program includes a duration of a contention access period (CAP) and a contention free period (CFP) And determines a duration of a data packet and a duration of an acknowledgment (ACK) for reception of the data packet on a slot-by-slot basis, and determines a duration of the data packet and a duration of an acknowledgment (PPR) period for each of the duration of the contention access period and the duration of the contention period, based on the calculated ratio, Set the Parallel Packet Transmission (PPT) period.

The embodiments of the present invention set up the interval of the uplink communication and the period of the downlink communication of the coordinator by setting the parallel packet receiving period and the parallel packet transmitting period for each of the duration of the contention access period and the duration of the non- A device, and a system.

In addition, embodiments of the present invention can provide a method, an apparatus, and a system that use a ratio between a duration of a data packet and a duration of a response response in a process of setting a parallel packet reception period and a parallel packet transmission period.

In addition, embodiments of the present invention can provide a method, an apparatus, and a system for setting a beacon frame based on a set parallel packet reception period and a parallel packet transmission period.

1 is a diagram illustrating a superframe structure of a coordinator according to an embodiment of the present invention.
2 is a diagram illustrating the duration of a logical superframe of an end device according to an embodiment of the present invention.
FIG. 3 is a diagram illustrating a process of setting a parallel packet reception period and a parallel packet transmission period for each of a duration of a contention access period and a duration of a non-contention period, according to an embodiment of the present invention.
4 is a diagram illustrating a structure of a beacon frame according to an embodiment of the present invention.
5 is a diagram illustrating a structure of a data packet frame according to an embodiment of the present invention.
6 is a diagram illustrating a structure of a response response frame according to an embodiment of the present invention.
7 is a flowchart illustrating a method of providing an IEEE 802.15.4 MAC protocol according to an embodiment of the present invention.
8 is a block diagram illustrating a system for providing an IEEE 802.15.4 MAC protocol according to an embodiment of the present invention.

1 is a diagram illustrating a superframe structure of a coordinator according to an embodiment of the present invention.

Referring to FIG. 1, a superframe of a coordinator includes an active period frame 110, an inactive period frame 120, and beacon frames 130 and 140. Herein, the active period frame 110 may include a contention access period (CAP) frame 150 and a contention free period (CFP) frame 160. Each of the contention access period frame 150 and the non-contention period frame 160 includes a parallel packet reception (PPR) frame 151 and a parallel packet transmission (PPT) frame 152, 162). At this time, the parallel packet reception frame 151 and the parallel packet transmission frame 152 of the contention access period frame 150 can be loaded with a beam on a slot basis and the parallel packet reception frame 161 and the parallel packet transmission frame 162 may also be loaded with a beam on a slot basis.

Once the network starts running, the endpoints can be connected to the coordinator itself. At this time, the coordinator transmits the beacon frames 130 and 161 together with the parallel packet reception frames 151 and 161 and the parallel packet transmission frames 152 and 162 for the contention access period frame 150 and the non-contention period frame 160, respectively. 140). At this time, the parallel packet reception frames 151 and 161 and the parallel packet transmission frames 152 and 162 for the contention access period frame 150 and the non-contention period frame 160, respectively, Information related to the parallel packet reception period and the parallel packet transmission period for each duration of the contention period may be included.

Further, the duration of the entire superframe may be changed based on a superframe order (SO) and a beacon order (BO). Therefore, the duration of the contention access period and the duration of the non-contention period may also be changed based on the superframe degree and the beacon degree.

 The process of setting the parallel packet reception period and the parallel packet transmission period of each of the duration of the contention access period and the duration of the non-contention period will be described in detail with reference to FIG.

The coordinator can perform uplink communication and downlink communication according to the superframe structure. For example, uplink communication in a contention access period broadcasts a beacon using a multi-beam antenna equipped with a coordinator, and after an end device in each sector scans a channel for connection with a coordinator . ≪ / RTI > In a more specific example, after the end device has scanned the channel, the end device containing the data may contend for securing the channel during the parallel packet reception period of the coordinator to communicate with the coordinator The terminating device is a parallel packet transmission period). At this time, channel access based on Carrier Sense Multiple Access Collision Avoidance (CSMA / CA) in the terminating device is allowed only in the uplink communication, so that the coordinator transmits data packets during the parallel packet receiving period And perform uplink communication to receive from the device.

The downlink communication in the contention access period can be performed during the parallel packet transmission period of the coordinator (if the coordinator is the parallel packet transmission period, the end apparatus is the parallel packet reception period). For example, the coordinator can perform downlink communication by sending an acknowledgment (ACK) to the end-device for a data packet reception. At this time, the carrier detection of the terminating device may not be performed, and the response reply to the waiting data packet may be piggy backed to the data.

The uplink communication in the non-contention period is performed during the parallel packet transmission period of the end apparatus (the coordinator is the parallel packet reception period when the end apparatus is the parallel packet transmission period) by using the time division multiple access (TDMA) . Also, the downlink communication in the non-contention period can be performed by transmitting the response reply to the coordinator during the parallel packet reception period of the end apparatus (the coordinator is the parallel packet transmission period if the end apparatus is the parallel packet reception period).

When the uplink communication and the downlink communication in each of the contention access period and the non-contention period are completed, an inactivity period may be applied to the coordinator and the terminal apparatus to save energy.

2 is a diagram illustrating the duration of a logical superframe of an end device according to an exemplary embodiment of the present invention.

Referring to FIG. 2, the duration of the logical superframe of the end device includes an active period 210, an inactive period 220, and beacon periods 230 and 240. Herein, the active period frame 210 may include a contention access period (CAP) 250 and a contention free period (CFP) 260. Each of the contention access period 250 and the non-contention period 260 includes a Parallel Packet Reception (PPR) period 251 and a Parallel Packet Transmission (PPT) period 252, . ≪ / RTI > In this case, the parallel packet receiving period 251 and the parallel packet transmitting frame 252 of the contention access period 250 can be set in units of slots, and the parallel packet receiving period 261 and the parallel receiving period of the non- The packet transmission period 262 may also be set on a slot basis.

FIG. 3 is a diagram illustrating a process of setting a parallel packet reception period and a parallel packet transmission period for each of a duration of a contention access period and a duration of a non-contention period, according to an embodiment of the present invention.

Referring to FIG. 3, a system providing an IEEE 802.15.4 MAC protocol sets a duration 310 of a contention access period and a duration 320 of a non-contention period as a slot unit 311, After determining the duration 330 and the response duration 340 of the response to receive the data packet on a slot-by-slot basis, the duration 330 of the data packet and the duration 340 of the response response to the data packet reception The parallel packet receiving period 351 and the parallel packet transmission period 352 of the duration 350 of the contention access period and the duration 360 of the non-contention period are calculated based on the calculated ratio, The reception period 361 and the parallel packet transmission period 362 can be set.

At this time, the system providing the IEEE 802.15.4 MAC protocol obtains the sum of each of the duration 330 of the data packet and the duration of the response reply 340, and calculates the duration of the data packet based on the obtained sum The ratio between the duration 330 of the data packet and the duration 340 of the response response can be calculated by setting a ratio between the duration of the response reply 330 and the duration of the response reply 340

For example, if the duration 310 of the contention access period is set to 12 slots, the duration 320 of the contention period is set to include 9 slots, and the duration 330 of the data packet is set to 6 If the duration of the response reply 340 is determined to include a total of three slots, then the system providing the IEEE 802.15.4 MAC protocol will determine the duration 330 of the data packet and the duration 340 of the response response, The parallel packet reception period 351 of the duration 350 of the contention access period includes 8 slots and the parallel packet transmission period 352 is 2: The parallel packet reception period 361 of the duration 360 of the non-contention period includes six slots and the parallel packet transmission period 362 is set to include three slots .

At this time the ratio between the duration 330 of the data packet and the duration 340 of the response reply can be calculated by obtaining the sum of the duration 330 of the data packet and the duration 340 of the response reply, have. For example, it has been determined that each of the duration of the first data packet, the duration of the second data packet and the duration of the third data packet are each two slots, and the duration of the first response reply, The sum of the durations 330 of the data packets can be computed in a total of six slots and the duration of the response reply 340 can be computed as a total of six slots, Can be calculated in a total of three slots. Thus, the ratio between the duration 330 of the data packet and the duration 340 of the response reply can be calculated to be 2: 1.

4 is a diagram illustrating a structure of a beacon frame according to an embodiment of the present invention.

Referring to FIG. 4, a beacon frame may be set based on a set parallel packet reception period and a parallel packet transmission period. For example, the beacon frame includes a frame control 410, a sequence number 420, an address field 430, an Auxilliary Security Header 440, A Superframe Specification 450, a Guaranteed Time Slot Field 460, a Pending Address 470, a Beacon Payload 480, a Frame Check Sequence ; FCS) Here, the superframe specification 450 includes a beacon degree (BO) 441, a superframe degree (SO) 442, a contention duration duration (CAP duration) 443, a battery life extension (PAN) 444, a Reserved 445, a Personal Area Network Coordinator 446 and an Association Permit 447, and the addressing field 430 may include a sector number ) 431 and a terminal address (Terminal Address) 432.

In addition, the duration 443 of the contention access period is set to a value obtained by multiplying the PPR Duration 448 and the PPT Duration, which are set based on the ratio between the duration of the data packet and the duration of the response, (449).

5 is a diagram illustrating a structure of a data packet frame according to an embodiment of the present invention.

5, a data packet frame includes a frame control 510, a sequence number 520, an addressing field 530, an Auxilliary Security Header 540 A data payload 550, and a frame check sequence (FCS) 560. The frame check sequence (FCS) Here, the addressing field 530 may include a sector number 531 and a terminal address 532.

6 is a diagram illustrating a structure of a response response frame according to an embodiment of the present invention.

Referring to FIG. 6, the response frame for receiving a data packet includes a frame control 610, a sequence number 620, a data payload 630, Frame Check Sequence (FCS) 640.

7 is a flowchart illustrating a method of providing an IEEE 802.15.4 MAC protocol according to an embodiment of the present invention.

Referring to FIG. 7, a system providing IEEE 802.15.4 MAC protocol sets a duration of a contention access period (CAP) and a duration of a contention free period (CFP) (710).

In addition, the system providing IEEE 802.15.4 MAC protocol determines 720 the duration of a data packet and the duration of an acknowledgment (ACK) for receiving a data packet, on a slot-by-slot basis.

In addition, the system providing the IEEE 802.15.4 MAC protocol calculates 730 the ratio between the duration of the data packet and the duration of the response response. At this time, the system providing the IEEE 802.15.4 MAC protocol obtains the sum of each of the duration of the data packet and the duration of the response response, and based on the obtained sum, the duration of the data packet and the duration of the response The ratio between the duration of the data packet and the duration of the response of the response can be calculated.

In addition, the system providing the IEEE 802.15.4 MAC protocol can perform a parallel packet reception (PPR) period and a parallel packet transmission period for the duration of the contention access period and the duration of the non-contention period, (Parallel Packet Transmission) period (740).

In addition, a system providing the IEEE 802.15.4 MAC protocol can set a beacon frame based on a set parallel packet reception period and a set parallel packet transmission period (not shown in the figure).

In addition, a system providing IEEE 802.15.4 MAC protocol can set frames of data packets and frames of response replies.

8 is a block diagram illustrating a system for providing an IEEE 802.15.4 MAC protocol according to an embodiment of the present invention.

Referring to FIG. 8, a system for providing the IEEE 802.15.4 MAC protocol includes a memory unit 810 and a processor 820.

The memory unit 810 records a program operating in the coordinator.

The processor 820 controls the operation of the coordinator in accordance with the program recorded in the memory unit.

Here, the program sets each of the duration of the contention access period (CAP) and the duration of the contention free period (CFP) in units of slots, and determines the duration of the data packet and the duration of the data packet Each of the duration of the acknowledgment (ACK) is determined on a slot basis, and the ratio between the duration of the data packet and the duration of the response is calculated, and based on the calculated ratio, A Parallel Packet Reception (PPR) period and a Parallel Packet Transmission (PPT) period are set for each duration of the contention period.

Further, the program can set the beacon frame based on the set parallel packet reception period and the set parallel packet transmission period.

The apparatus described above may be implemented as a hardware component, a software component, and / or a combination of hardware components and software components. For example, the apparatus and components described in the embodiments may be implemented within a computer system, such as, for example, a processor, a controller, an arithmetic logic unit (ALU), a digital signal processor, a microcomputer, a field programmable array (FPA) A programmable logic unit (PLU), a microprocessor, or any other device capable of executing and responding to instructions. The processing device may execute an operating system (OS) and one or more software applications running on the operating system. The processing device may also access, store, manipulate, process, and generate data in response to execution of the software. For ease of understanding, the processing apparatus may be described as being used singly, but those skilled in the art will recognize that the processing apparatus may have a plurality of processing elements and / As shown in FIG. For example, the processing unit may comprise a plurality of processors or one processor and one controller. Other processing configurations are also possible, such as a parallel processor.

The software may include a computer program, code, instructions, or a combination of one or more of the foregoing, and may be configured to configure the processing device to operate as desired or to process it collectively or collectively Device can be commanded. The software and / or data may be in the form of any type of machine, component, physical device, virtual equipment, computer storage media, or device , Or may be permanently or temporarily embodied in a transmitted signal wave. The software may be distributed over a networked computer system and stored or executed in a distributed manner. The software and data may be stored on one or more computer readable recording media.

The method according to an embodiment may be implemented in the form of a program command that can be executed through various computer means and recorded in a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, and the like, alone or in combination. The program instructions to be recorded on the medium may be those specially designed and configured for the embodiments or may be available to those skilled in the art of computer software. Examples of computer-readable media include magnetic media such as hard disks, floppy disks and magnetic tape; optical media such as CD-ROMs and DVDs; magnetic media such as floppy disks; Magneto-optical media, and hardware devices specifically configured to store and execute program instructions such as ROM, RAM, flash memory, and the like. Examples of program instructions include machine language code such as those produced by a compiler, as well as high-level language code that can be executed by a computer using an interpreter or the like. The hardware devices described above may be configured to operate as one or more software modules to perform the operations of the embodiments, and vice versa.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. For example, it is to be understood that the techniques described may be performed in a different order than the described methods, and / or that components of the described systems, structures, devices, circuits, Lt; / RTI > or equivalents, even if it is replaced or replaced.

Therefore, other implementations, other embodiments, and equivalents to the claims are also within the scope of the following claims.

Claims (5)

A method for providing an IEEE 802.15.4 MAC protocol using a multi-beam antenna mounted on a coordinator,
Setting a duration of a contention access period (CAP) and a duration of a contention free period (CFP) in units of slots;
Determining, for each slot, a duration of a data packet and a duration of an acknowledgment (ACK) for receiving the data packet;
Calculating a ratio between the duration of the data packet and the duration of the response response; And
A Parallel Packet Reception (PPR) period and a Parallel Packet Transmission (PPT) period are set for each of the duration of the contention access period and the duration of the non-contention period based on the calculated ratio Step
Gt; IEEE 802.15.4 < / RTI > MAC protocol. The method according to claim 1,
Wherein calculating the ratio between the duration of the data packet and the duration of the response reply
Obtaining a sum of the duration of the data packet and the duration of the response response, respectively; And
Setting a ratio between the duration of the data packet and the duration of the response response based on the obtained sum
Gt; IEEE 802.15.4 < / RTI > MAC protocol. The method according to claim 1,
Setting a beacon frame based on the set parallel packet reception period and the set parallel packet transmission period
The method comprising the steps of: The method according to claim 1,
Setting a frame of the data packet and a frame of the response reply
The method comprising the steps of: A system for providing an IEEE 802.15.4 MAC protocol using a multi-beam antenna mounted on a coordinator,
A memory unit for recording a program operating in the coordinator; And
A processor for controlling the operation of the coordinator according to the program recorded in the memory unit,
Lt; / RTI >
The program includes:
A duration of a contention access period (CAP) and a duration of a contention free period (CFP) are set in units of slots,
Determines a duration of a data packet and a duration of an acknowledgment (ACK) for receiving the data packet,
Calculating a ratio between the duration of the data packet and the duration of the response response,
A Parallel Packet Reception (PPR) period and a Parallel Packet Transmission (PPT) period are set for each of the duration of the contention access period and the duration of the non-contention period based on the calculated ratio A system that provides the IEEE 802.15.4 MAC protocol.

Images