Sensor network medium access control (MAC) system for multihop communication
First Claim
Patent Images
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, andwherein a multi-superframe is formed of a plurality of superframes, and includes at least one non-competition period which consists of time slots including a plurality of channels, andwherein the allocated slot is an extended slot defined with a slot number of a time slot and a channel number indicating a channel of the time slot, andwherein a number of superframes constituting the multi-superframe is 2(MO-SO), andwhere MO denotes a length of the multi-superframes and SO denotes a length of a superframe.
2 Assignments
0 Petitions
Accused Products
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.
13 Citations
23 Claims
-
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, and wherein a multi-superframe is formed of a plurality of superframes, and includes at least one non-competition period which consists of time slots including a plurality of channels, and wherein the allocated slot is an extended slot defined with a slot number of a time slot and a channel number indicating a channel of the time slot, and wherein a number of superframes constituting the multi-superframe is 2(MO-SO), and where MO denotes a length of the multi-superframes and SO denotes a length of a superframe. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A slot scheduling method performed in an MAC system of a multihop sensor network, the slot scheduling method comprising:
-
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 a multi-superframe is formed of a plurality of superframes and includes at least one non-competition period which consists of time slots including a plurality of channels, and wherein the allocated slot is an extended slot defined with a slot number of a time slot and a channel number indicating a channel of the time slot, and wherein a number of superframes constituting the multi-superframe is 2(MO-SO), and where MO denotes a length of the multi-superframes and SO denotes a length of a superframe. - View Dependent Claims (11, 12, 13, 14)
-
-
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:
-
defining a multi-superframe by including at least one superframe, wherein the defining is performed by a coordinator of the multihop sensor network; constructing a non-competition period of the multi-superframe with an extended slot defined with a channel number and a slot number; transmitting one of a request command, reply command, or notification command that comprises an extended slot characteristic field, and wherein the multi-superframe is formed of a plurality of superframes and includes at least one non-competition period which consists of time slots including a plurality of channels, and wherein the slot number includes a time slot and a channel number indicates a channel of the time slot, and wherein a number of superframes constituting the multi-superframe is 2(MO-SO), and where MO denotes a length of the multi-superframes and SO denotes a length of a superframe. - View Dependent Claims (16, 17, 18, 19)
-
-
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:
-
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, and wherein a multi-superframe is formed of a plurality of superframes, and includes at least one non-competition period which consists of time slots including a plurality of channels, and wherein an allocated slot is an extended slot defined with a channel number indicating a channel of a time slot and a slot number of the time slot, and wherein a number of superframes constituting the multi-superframe is 2(MO-SO), and where MO denotes a length of the multi-superframes and SO denotes a length of a superframe. - View Dependent Claims (21, 22, 23)
-
Specification