发明名称 |
Weighted-fairness in message rate based congestion control for vehicular systems |
摘要 |
A system and method for implementing congestion control for vehicles based at least in part on weighted fair message rates is disclosed. The system comprises a measurement module, a calculation module and a determination module. The measurement module measures a channel busy ratio describing a fraction of time during which a channel is busy. The calculation module calculates a ratio error by comparing the measured channel busy ratio with a target channel busy ratio. The determination module determines a first parameter value for a first vehicle based at least in part on a ratio of weights and determines a message rate for the first vehicle based at least in part on the ratio error and the first parameter value. The message rate describes a speed for transmitting messages from the first vehicle. |
申请公布号 |
US8948044(B2) |
申请公布日期 |
2015.02.03 |
申请号 |
US201213664308 |
申请日期 |
2012.10.30 |
申请人 |
Toyota Jidosha Kabushiki Kaisha |
发明人 |
Bansal Gaurav;Kenney John |
分类号 |
H04L12/28;H04W28/02;H04L12/825 |
主分类号 |
H04L12/28 |
代理机构 |
Patent Law Works LLP |
代理人 |
Patent Law Works LLP |
主权项 |
1. A computer-implemented method, comprising:
measuring a channel busy ratio describing a fraction of time during which a channel is busy; calculating a ratio error by comparing the measured channel busy ratio with a target channel busy ratio; determining a first parameter value for a first vehicle based at least in part on a ratio of weights; and determining a message rate for the first vehicle recursively based at least in part on the ratio error and the first parameter value so that the message rate converges to a steady state message rate based at least in part on the ratio of the weights, the message rate describing a speed for transmitting messages from the first vehicle. |
地址 |
Toyota-shi, Aichi-ken JP |