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| 국가/구분 | United States(US) Patent 등록 |
|---|---|
| 국제특허분류(IPC7판) |
|
| 출원번호 | US-0605628 (1990-10-29) |
| 발명자 / 주소 |
|
| 출원인 / 주소 |
|
| 인용정보 | 피인용 횟수 : 261 인용 특허 : 0 |
Method and apparatus for coordinating a usage of a wireless transmission medium among a plurality of transmission units (12). The transmission medium is of a type that is utilized in accordance with a protocol having a transmission period that is comprised of a plurality of consecutively occurring t
Method and apparatus for coordinating a usage of a wireless transmission medium among a plurality of transmission units (12). The transmission medium is of a type that is utilized in accordance with a protocol having a transmission period that is comprised of a plurality of consecutively occurring transmission sub-periods. A method includes the following steps. A data structure (28a) is periodically circulated among the transmission units, the data structure being expressive of an identification of each of the transmission units and also expressive of an identification of an assigned transmission sub-period or sub-periods, if any, during which each of the transmission units is permitted to transmit on the wireless medium. The step of circulating includes the following steps: (a) receiving the data structure from a first transmission unit with a second transmission unit; (b) respsonsive to the receipt of the data structure at the second transmission unit processing the data structure in accordance with an amount, if any, of impending transmission activity to modify the assignments of sub-periods therein; and (c) transmitting the modified data structure to another one of the transmission units. A method of synchronizing the plurality of transmission units to a slotted transmission protocol is also disclosed.
A method of synchronizing a usage of a wireless transmission medium amongst a plurality of transmission means having a transmission coverage area associated therewith, at least two of the coverage areas having an overlap region therebetween, the transmission medium being utilized in accordance with
A method of synchronizing a usage of a wireless transmission medium amongst a plurality of transmission means having a transmission coverage area associated therewith, at least two of the coverage areas having an overlap region therebetween, the transmission medium being utilized in accordance with a transmission period that is comprised of a plurality of consecutively occurring transmission sub-periods, comprising the steps of: (a) transmitting a message over the wireless transmission medium with only one of the transmission means, the message being repetitively transmitted during each of the transmission sub-periods of at least one of the transmission periods; (b) receiving the repetitively transmitted messages with one or more transmitter/receiver means disposed within the coverage area associated with the transmitting transmission means; (c) re-transmitting the received messages with each of the transmitter/receiver means receiving the repetitively transmitted messages, including a transmitter/receiver means, if any, that is disposed within the overlap region; (d) receiving the re-transmitted messages from the transmitter/receiver within the overlap region with another transmission means; and responsive to the reception of the re-transmitted messages (e) synchronizing a timekeeping function of the second transmission means thereto so as to subsequently determine with the timekeeping function a required starting time of a predetermined one of the sub-periods for transmitting or receiving another message therein.
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