发明名称 |
Channel access method and node |
摘要 |
A channel access method and a node are disclosed. The method includes randomly selecting a backoff period XB according to a backoff exponent BE, where XB=X×aUnitBackoffPeriod, and X is an integer randomly selected from 0−(2BE−1); when X is greater than or equal to a predetermined value, determining a middle backoff, where the middle backoff is less than the backoff period, performing a backoff until the middle backoff ends and then performing a CCA; if a channel is clear, performing data transmission, and if the channel is not clear, continuing the backoff until the backoff period ends and then performing a CCA, and executing a channel access operation according to a result of the CCA performed when the backoff period ends. Therefore, data transmission is performed when a channel is clear, which can reduce a data transmission delay. |
申请公布号 |
US9532382(B2) |
申请公布日期 |
2016.12.27 |
申请号 |
US201514663986 |
申请日期 |
2015.03.20 |
申请人 |
Huawei Technologies Co., Ltd. |
发明人 |
Liu Pei |
分类号 |
H04W74/08;H04W4/00;H04W24/02 |
主分类号 |
H04W74/08 |
代理机构 |
Conley Rose, P.C. |
代理人 |
Conley Rose, P.C. |
主权项 |
1. A channel access method, comprising:
randomly selecting a backoff period XB according to a backoff exponent BE, wherein XB=X×aUnitBackoffPeriod, X is an integer randomly selected from 0−(2BE−1), and aUnitBackoffPeriod is a constant for a Medium Access Control (MAC) sublayer; when X is greater than or equal to a predetermined value, determining a middle backoff, wherein the middle backoff is less than the backoff period, performing a backoff until the middle backoff ends and then performing a clear channel assessment (CCA), performing data transmission when a channel is clear, and when the channel is not clear, continuing the backoff until the backoff period ends and then performing a CCA, and executing a channel access operation according to a result of the CCA performed when the backoff period ends; and when X is less than a predetermined value, performing a backoff until the backoff period ends and then performing a CCA, and executing a channel access operation according to a result of the CCA performed when the backoff period ends. |
地址 |
Shenzhen CN |