Method for selecting operational channel of network coordinator in wireless narrow area network and coordinator using the same
First Claim
1. A method for selecting an operational channel of a wireless narrow area network, comprising:
- checking by a first coordinator a channel occupied state of another coordinator operated in an effective channel based on a received beacon frame in the first coordinator of the wireless narrow area network;
detecting an operable period based on a check result of the channel occupied state of the another coordinator; and
determining a time offset according to the operable period detection result of the another coordinator,wherein the checking by the first coordinator the channel occupied state of the another coordinator includes checking whether different beacon frames are received according to a comparison result of ‘
a maximum beacon interval excluding a predetermined protection time’ and
‘
a current timer’
,wherein the predetermined protection time is determined as a smallest superframe duration among entire superframe durations including own superframe duration.
1 Assignment
0 Petitions
Accused Products
Abstract
A method for selecting an operational channel of a wireless narrow area network, a coordinator using the same, and a computer-readable recording media recording a program for realizing the method. More particularly, a method for selecting an operational channel of a wireless narrow area network in which one radio channel is occupied by a plurality of coordinators at different timings by selecting a predetermined period of a radio channel where a coordinator of the wireless narrow area network is used by another coordinator as own operational channel, a coordinator using the same, and a computer-readable recording media recording a program for realizing the method.
27 Citations
23 Claims
-
1. A method for selecting an operational channel of a wireless narrow area network, comprising:
-
checking by a first coordinator a channel occupied state of another coordinator operated in an effective channel based on a received beacon frame in the first coordinator of the wireless narrow area network; detecting an operable period based on a check result of the channel occupied state of the another coordinator; and determining a time offset according to the operable period detection result of the another coordinator, wherein the checking by the first coordinator the channel occupied state of the another coordinator includes checking whether different beacon frames are received according to a comparison result of ‘
a maximum beacon interval excluding a predetermined protection time’ and
‘
a current timer’
,wherein the predetermined protection time is determined as a smallest superframe duration among entire superframe durations including own superframe duration. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
-
-
20. A coordinator of a wireless narrow area network for selecting an operational channel, comprising:
-
a channel state checking means for checking a channel occupied state of another coordinator operated in an effective channel based on a received beacon frame of the wireless narrow area network; an operable period detecting means for detecting an operable period based on a check result of the channel occupied state in the channel state checking means; and determining a time offset according to a detection result in the operable period detecting means, wherein the operable period detecting means detects a non-occupied block period between superframes and the operable period according to the non-occupied block period by arranging the superframes according to a time order based on a reference slot timing determined in the channel state checking means, wherein the channel state checking means checks whether different beacon frames are received according to a comparison result of ‘
a maximum beacon interval excluding a predetermined protection time’ and
‘
a current timer’
,wherein the predetermined protection time is determined as a smallest superframe duration among entire superframe durations including own superframe duration. - View Dependent Claims (21, 22)
-
-
23. A non-transitory computer-readable recording media recording a program for realizing following functions in a first coordinator for selecting an operational channel of a wireless narrow area network having a processor, the program which when executed by the processor performs the functions comprising:
-
checking a channel occupied state of another coordinator operated in an effective channel based on a received beacon frame in the first coordinator of the wireless narrow area network; detecting an operable period based on a check result of the channel occupied state of the another coordinator; and determining a time offset according to the operable period detection result of the another coordinator, wherein the checking by the first coordinator the channel occupied state of the another coordinator includes checking whether different beacon frames are received according to a comparison result of ‘
a maximum beacon interval excluding a predetermined protection time’ and
‘
a current timer’
,wherein the predetermined protection time is determined as a smallest superframe duration among entire superframe durations including own superframe duration.
-
Specification