Method of operating a media access controller
View Patent ↗A method is provided for a remote device to monitor and communicate with a wireless network using cyclic beacons. The remote device receives a beacon, which beacon includes beacon information that defines a superframe. From the beacon information, the remote device determines whether the received beacon and the associated superframe are assigned to a network device or are unassigned. By receiving as many beacons as there are allowable devices in the network, the remote device can determine if the network is full. If the remote device runs through all of the beacons and all indicate that their associated superframes are assigned, then the remote device determines that the network is full and performs a network-full function. If the remote device receives a beacon that indicates that its associated superframe is unassigned, it determines that the network is not full and performs an association request during the unassigned superframe.
1. A method for a remote device to monitor and communicate with a wireless network, comprising:
receiving a beacon at the remote device, the beacon including beacon information that defines a superframe;
determining from the beacon information whether one or more management time slots within an associated superframe are assigned to a network device or are unassigned;
repeating the steps of receiving and determining until the remote device either receives M beacons indicating that the one or more management time slots within the associated superframe are assigned, or a beacon indicating that the one or more management time slots within the associated superframe are unassigned;
performing an association request if the remote device receives the beacon indicating that the one or more management time slots within the associated superframe are unassigned;
performing a network-full function if the remote device receives the M beacons indicating that the one or more management time slots within the associated superframe are assigned,
wherein M is an integer greater than one.
2. A method for a remote device to monitor and communicate with a wireless network, as recited in claim 1 , wherein the beacon information comprises a single bit indicative of whether the one or more management time slots within the associated superframe are assigned or unassigned.
3. A method for a remote device to monitor and communicate with a wireless network, as recited in claim 1 , wherein the beacon information includes device identification (ID) information.
4. A method for a remote device to monitor and communicate with a wireless network, as recited in claim 3 ,
wherein the device ID information is a device ID of an associated network device if the one or more management time slots within the associated superframe are assigned, and
wherein the device ID is a set unassigned value that does not correspond to any network device but is indicative that the one or more management time slots within the associated superframe are unassigned.
5. A method for a remote device to monitor and communicate with a wireless network, as recited in claim 1 , wherein the network-full function includes sending an error message to a higher layer.
6. A method for a remote device to monitor and communicate with a wireless network, comprising:
receiving a beacon at the remote device, the beacon including beacon information that defines a superframe;
determining from the beacon information whether a plurality of management time slots within an associated superframe are fully assigned to N network devices or whether the plurality of management time slots in the associated superframe are assigned to fewer than N devices;
repeating the steps of receiving and determining until the remote device either receives M beacons indicating that a corresponding plurality of management time slots in the associated superframes are fully assigned to N network devices or one beacon indicating that the corresponding plurality of management time slots in the associated superframe are assigned to fewer that N network devices;
performing an association request if the remote device receives a beacon indicating that the corresponding plurality of management time slots in the associated superframe are assigned to fewer that N network devices;
performing a network-full function if the remote device receives M beacons indicating that a corresponding plurality of management time slots in the associated superframes are fully assigned to N network devices,
wherein M is an integer greater than one, and
wherein N is an integer greater than one.
7. A method for a remote device to monitor and communicate with a wireless network, as recited in claim 6 , wherein the value of N can vary for each superframe.
8. A method for a remote device to monitor and communicate with a wireless network, as recited in claim 6 , wherein the beacon information includes first through N th device identification (ID) information.
9. A method for a remote device to monitor and communicate with a wireless network, as recited in claim 8 ,
wherein each of the first through N th device ID information is one of: a device ID of an associated network device, and a set unassigned value that does not correspond to any network device but is indicative of one or more unassigned management time slots, and
wherein the plurality of management time slots in the associated superframe are considered to be fully assigned if all of the first through N th device information are device IDs, and the plurality of management time slots in the associated superframe are considered to be assigned to fewer that N network devices if any of the first through N th device information are the set unassigned value.
10. A method for a remote device to monitor and communicate with a wireless network, as recited in claim 6 , wherein the network-full function includes sending an error message to a higher layer.
11. A method for a coordinator to communicate information in a wireless network that employs a superframe structure, comprising:
generating M beacons, each including beacon information that defines one of M respective superframes; and
sequentially transmitting the M beacons, respectively, during the M respective superframes,
wherein the beacon information includes data indicative of whether management time slots within the respective superframe are assigned to a device in the network or are unassigned, and
wherein M is an integer greater than one.
12. A method for a coordinator to communicate information in a wireless network that employs a superframe structure, as recited in claim 11 , wherein the steps of generating M beacons and sequentially transmitting the M beacons are continually repeated throughout operation of the network.
13. A method for a coordinator to communicate information in a wireless network that employs a superframe structure, as recited in claim 11 , wherein M is equal to the maximum number of devices allowable in the network.
14. A method for a coordinator to communicate information in a wireless network that employs a superframe structure, as recited in claim 11 , wherein M is equal to the number of assigned devices in the network plus a set value.
15. A method for a coordinator to communicate information in a wireless network that employs a superframe structure, as recited in claim 14 , wherein the set value is one.
16. A method for a coordinator to communicate information in a wireless network that employs a superframe structure, comprising:
generating M beacons, each including beacon information that defines one of M respective superframes; and
sequentially transmitting the M beacons, respectively, during the M respective superframes,
wherein the beacon information includes data indicative of whether a plurality of management time slots within the respective superframe are fully assigned to N devices in the network or whether the plurality of management time slots in the superframe are assigned to fewer than N devices,
wherein M is an integer greater than one, and
wherein N is an integer greater than one.
17. A method for a coordinator to communicate information in a wireless network that employs a superframe structure, as recited in claim 16 , wherein the steps of generating M beacons and sequentially transmitting the M beacons are continually repeated throughout operation of the network.
18. A method for a coordinator to communicate information in a wireless network that employs a superframe structure, as recited in claim 16 , wherein (M×N) is equal to the maximum number of devices allowable in the network.