Multiplex communications – Wide area network – Packet switching
Patent
1995-10-16
1996-11-19
Marcelo, Melvin
Multiplex communications
Wide area network
Packet switching
370 50, 370 953, H04B 726, H04J 400
Patent
active
055770240
ABSTRACT:
The invention relates to a communication method for a digital cellular mobile telephone system and a digital cellular mobile telephone system comprising several base stations and mobiles utilizing time division multiple access. In the system communication is carried out on a predetermined frequency band in a predetermined number of time slots having a predetermined length. In the communication between the mobiles and the base station within the TDMA time slot with the predetermined length, the transmissions to communicate information comprising a few bits or several bits from the mobiles communicating with the same base station at least within the same time slot are mutually substantially orthogonal. Preferably, in order to communicate information, preferably information of the on-off type, such as acknowledgments and channel allocation requests, the mobiles communicating with the same base station use substantially orthogonal transmissions at least to the same base station in the same time slot. Preferably each mobile transmits within the TDMA burst of said TDMA time slot of the predetermined length as a part of the burst a predetermined bit sequence corresponding to the transmitted information bit combination, whereby the predetermined frequency band is unchanged. The bit sequences transmitted by different mobiles to the same base station are mutually substantially orthogonal. By using such substantially orthogonal transmissions it is possible to avoid collisions between the communications of information comprising a few or several bits, typically 1 to 10 bits, such as acknowledgments and channel allocation requests, which typically occur in a time division multiple access system.
REFERENCES:
patent: 3789149 (1974-01-01), Clark
patent: 4301530 (1981-11-01), Gutleber
patent: 4754453 (1988-06-01), Eizenhofer
patent: 4799252 (1989-01-01), Eizenhoffer et al.
patent: 4882579 (1989-11-01), Siwiak
patent: 5012469 (1991-04-01), Sardana
patent: 5103459 (1992-04-01), Gilhousen et al.
patent: 5170412 (1992-12-01), Massey
patent: 5241542 (1993-08-01), Natarajan et al.
patent: 5327432 (1994-07-01), Zein Al Abedeen et al.
patent: 5412659 (1995-05-01), Fujita et al.
Finnish Office Action dated 25 May 1994 on Finnish Priority Application No. 933129 and English translation thereof.
Generalized Complementary Code Sets, B. Schweitzer, 1972, pp. 1-86.
Digital Communications Fundamentals and Applications, Sklar, B., Prentice Hall, Englewood Cliffs, New Jersey, Chapters 9-10, 1988.
"Contention-Based Reservation Protocol Using a TDD Channel for Wireless Local Area Networks: A Performance Analysis", T. Suzuki et al., IEEE In't. Conf on Communications '93, May 23-26, 1993.
Jokinen Harri
Malkamaki Esa
Marcelo Melvin
Nokia Mobile Phones Ltd.
LandOfFree
Multiple access radio system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Multiple access radio system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multiple access radio system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-546468