Title:
データ送信方法及び無線リンクシステム
Document Type and Number:
Japanese Patent JP3726232
Kind Code:
B2
Abstract:
This invention relates to data transmission in a microwave link system particularly through point-to-multipoint connections. The arrangement according to the invention utilizes both frequency and time division duplex arrangement to simplify substation structures. In accordance with the invention a substation transmits at different times than it receives, and uses different frequencies for the transmission and reception. The central station, in turn, includes a duplexer unit, whereby it can both transmit and receive simultaneously when the transmission and reception frequencies are sufficiently apart. Such an arrangement achieves advantages of the time division duplex arrangement, such as e.g. an inexpensive substation structure, without the drawbacks related to the time division duplex arrangement.
Inventors:
Mekinen Yarmo
Application Number:
JP2000604550A
Publication Date:
December 14, 2005
Filing Date:
March 06, 2000
Export Citation:
Assignee:
NOKIA CORPORATION
International Classes:
H04J4/00; H04B7/26; H04W16/02; H04W28/00; H04W28/06; H04W72/04; H04W92/12; (IPC1-7): H04Q7/36; H04J4/00; H04Q7/38
Domestic Patent References:
| JP4373320A |
Foreign References:
| US5617412 |
Attorney, Agent or Firm:
Minoru Nakamura
Fumiaki Otsuka
Sadao Kumakura
Shishido Kaichi
Hideto Takeuchi
Toshio Imajo
Nobuo Ogawa
Village shrine Atsuo
Takaki Nishijima
Atsushi Hakoda
Fumiaki Otsuka
Sadao Kumakura
Shishido Kaichi
Hideto Takeuchi
Toshio Imajo
Nobuo Ogawa
Village shrine Atsuo
Takaki Nishijima
Atsushi Hakoda