发明名称 |
CATV communication system, method of communication by the same, and center and terminal devices thereof |
摘要 |
The CATV system includes a center device and a plurality of terminal devices. The center device sends downstream timeslots, to the terminal devices, including upstream timeslot occupancy information and collision information. Upstream timeslot occupancy information indicates whether or not an upstream timeslot corresponding to the downstream timeslot is vacant, and collision information indicates whether or not a collision has occurred. The terminal device receives the downstream timeslot, checks upstream timeslot occupancy information to detect upstream timeslot in the vacant state, and sends upstream data to the center device via the vacant upstream timeslot. If the upstream timeslot makes a collision, the center device detects it and sends a downstream timeslot which includes collision information indicative of the occurrence of the collision. The user of the terminal device recognizes the collision having occurred or not by referring to the collision information.
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申请公布号 |
US5930475(A) |
申请公布日期 |
1999.07.27 |
申请号 |
US19960756522 |
申请日期 |
1996.11.26 |
申请人 |
PIONEER EECTRONICS CORPORATION;IMAGE A CORPORATION |
发明人 |
YASHIRO, KENJI;SASADA, TETSUICHIRO |
分类号 |
H04N7/16;H04B7/212;H04H20/76;H04H20/78;H04H60/13;H04J3/00;H04L12/413;H04L12/43;H04L12/44;H04N7/10;(IPC1-7):H04N7/10 |
主分类号 |
H04N7/16 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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