Title:
BASE STATION UNIT FOR DSA COMMUNICATION SYSTEM
Document Type and Number:
Japanese Patent JP3462440
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To enable impartial sharing of frequency bands between a DSA communication system and a CSMA communication system when both communication systems use the same frequency band in common and stably transmits a notice channel (Bch) to prevent out of frame synchronism in the DSA communication system.
SOLUTION: In the case that transmission/reception of a burst signal is stopped through the detection of an interference wave at the head of a frame period, when no interference wave is detected continuously for a prescribed period from prescribed timing in the frame period until the end of the frame, a reservation signal to acquire a token for a succeeding frame is transmitted. In the case that no burst signal is transmitted due to the detection of an interference wave and a token is acquired by a succeeding frame, part or all of an area assigned to a random access burst (Rch) in the frame is used for a communication area depending on the stored information amount.
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Inventors:
Tomohiro Tokuyasu
Atsushi Ohta
Atsushi Ohta
Application Number:
JP2000033099A
Publication Date:
November 05, 2003
Filing Date:
February 10, 2000
Export Citation:
Assignee:
Nippon Telegraph and Telephone Corporation
International Classes:
H04J3/00; H04L69/14; H04W16/14; H04W72/04; H04W72/06; H04W88/08; (IPC1-7): H04Q7/38; H04J3/00; H04L29/04
Domestic Patent References:
| JP6506340A |
Other References:
【文献】国際公開98/059465(WO,A1)
Attorney, Agent or Firm:
Furuya Fumio