SENSOR NETWORK MEDIUM ACCESS CONTROL (MAC) SYSTEM FOR MULTIHOP COMMUNICATION
First Claim
1. A slot scheduling method performed in a medium access control (MAC) system of a multihop sensor network, the slot scheduling method comprising:
- transmitting a request command that requests slot allocation, from a source node to a destination node that exists within transmission range;
receiving a reply command that indicates the slot allocation, from the destination node; and
transmitting to the destination node a notification command that confirms that a slot has been allocated,wherein the slot is an extended slot defined with a channel number and a slot number within a non-competition period of a multi-superframe formed of at least one superframe.
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Abstract
A medium access control (MAC) technique of a multihop sensor network. In the multihop sensor network, the MAC technique may contribute to significantly reducing transmission delay, and allow real-time services to be provided to all nodes by extending a guaranteed time slot (GTS) restricted to one hop in a personal area network (PAN) coordinator (PNC) to all nodes. Furthermore, the MAC technique may allow the number of available GTSs to be significantly increased, by using all 16 frequency band channels instead of using only a single frequency band and setting a multi-superframe.
53 Citations
25 Claims
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1. A slot scheduling method performed in a medium access control (MAC) system of a multihop sensor network, the slot scheduling method comprising:
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transmitting a request command that requests slot allocation, from a source node to a destination node that exists within transmission range; receiving a reply command that indicates the slot allocation, from the destination node; and transmitting to the destination node a notification command that confirms that a slot has been allocated, wherein the slot is an extended slot defined with a channel number and a slot number within a non-competition period of a multi-superframe formed of at least one superframe. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A slot scheduling method performed in an MAC system of a multihop sensor network, the slot scheduling method comprising:
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receiving a request command that requests slot allocation, from a source node, wherein the receiving is performed by a destination node; transmitting a reply command that includes an allocated slot, to the source node; and receiving from the source node a notification command that confirms the slot allocation, wherein the slot is an extended slot defined with a channel number and a slot number within a non-competition period of a multi-superframe formed of at least one superframe. - View Dependent Claims (11, 12, 13, 14)
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15. A method of scheduling the slots in a non-competition period of a superframe between neighboring nodes in a MAC system of a multihop sensor network, the slot scheduling method comprising:
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defining a multi-superframe by including at least one superframe, wherein the defining is performed by a coordinator of the multihop sensor network; and constructing a non-competition period of the multi-superframe with an extended slot defined with a channel number and a slot number. - View Dependent Claims (16, 17, 18, 19)
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20. A method of scheduling the slots in a non-competition period of a superframe between neighboring nodes in a MAC system of a multihop sensor network, the slot scheduling method comprising:
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transmitting a request command for the slot scheduling, from a first node to a second node; receiving a reply command from the second node; and transmitting to the second node a notification command that confirms the reply command, wherein the slot is an extended slot defined with a channel number and a slot number within a non-competition period of a multi-superframe formed of at least one superframe. - View Dependent Claims (21, 22, 23)
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24. A MAC communication system for performing multihop communication between a plurality of nodes in a sensor network by using a superframe, wherein:
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a beacon interval of the sensor network comprises an active duration while communication is performed through the superframe and an inactive duration while no communication is performed; and the inactive duration is constructed with a plurality of superframes so that the entire beacon interval is activated to perform communication. - View Dependent Claims (25)
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Specification