A method of changing a beacon position at a device in a wireless network, the method comprising: receiving (S30), from a coordinator of the wireless network, a beacon after the wireless network is established; characterized by : transmitting (S31), to the coordinator, a change request message for requesting a change of a beacon position among configuration parameters of the wireless network, wherein the change request message includes an offset, for a beacon position change, from an original beacon position to a requested new beacon position on a time-divided superframe; and receiving (S32), from the coordinator, a response message in response to the request message, wherein the response message includes a reason code related to whether the beacon position change request is accepted, wherein the device interprets the reason code based on the following Table 1, Table 1 Valid Value of Reason Code Response Message 0 Success 1 Unsupported Feature 2 Already synchronized with higher priority stream 3 WVAN shutdown in progress 4 Channel change in progress 5 Coordinator handover in progress 6-254 Reserved 255 Other failure and wherein a zero value in Table 1 represents acceptance for the beacon position change request, and any value among 1-5 and 255 in Table 1 represents each of reasons of rejection for the beacon position change request. receiving (S30), from a coordinator of the wireless network, a beacon after the wireless network is established; characterized by : transmitting (S31), to the coordinator, a change request message for requesting a change of a beacon position among configuration parameters of the wireless network, wherein the change request message includes an offset, for a beacon position change, from an original beacon position to a requested new beacon position on a time-divided superframe; and receiving (S32), from the coordinator, a response message in response to the request message, wherein the response message includes a reason code related to whether the beacon position change request is accepted, wherein the device interprets the reason code based on the following Table 1, Table 1 Valid Value of Reason Code Response Message 0 Success 1 Unsupported Feature 2 Already synchronized with higher priority stream 3 WVAN shutdown in progress 4 Channel change in progress 5 Coordinator handover in progress 6-254 Reserved 255 Other failure and wherein a zero value in Table 1 represents acceptance for the beacon position change request, and any value among 1-5 and 255 in Table 1 represents each of reasons of rejection for the beacon position change request. transmitting (S31), to the coordinator, a change request message for requesting a change of a beacon position among configuration parameters of the wireless network, wherein the change request message includes an offset, for a beacon position change, from an original beacon position to a requested new beacon position on a time-divided superframe; and receiving (S32), from the coordinator, a response message in response to the request message, wherein the response message includes a reason code related to whether the beacon position change request is accepted, wherein the device interprets the reason code based on the following Table 1, Table 1 Valid Value of Reason Code Response Message 0 Success 1 Unsupported Feature 2 Already synchronized with higher priority stream 3 WVAN shutdown in progress 4 Channel change in progress 5 Coordinator handover in progress 6-254 Reserved 255 Other failure and wherein a zero value in Table 1 represents acceptance for the beacon position change request, and any value among 1-5 and 255 in Table 1 represents each of reasons of rejection for the beacon position change request. <EOS>