Showing papers on "Cellular network published in 1985"
21 May 1985
TL;DR: The fundamental ideas behind a cellular network design program are described and by the aid of a generalization of the notion of a radio cell it becomes possible to integrate hitherto isolated areas of investigation.
Abstract: The fundamental ideas behind a cellular network design program are described. By the aid of a generalization of the notion of a radio cell it becomes possible to integrate hitherto isolated areas of investigation. The elementary design steps making up the program are outlined together with their interconnections. The program may be used to design new networks, analyze or extend existing ones, and study system variants and design strategies in a general nonhomogeneous setting.
30 citations
Patent•
02 Sep 1985
TL;DR: In this article, the authors proposed a method for passing a mobile station on from one radio cell to another within a cellular mobile radio network, in which each radio cell is associated with a fixed station exchanging signals with mobile stations, wherein the reception quality of signal bursts, which have been emitted by the mobile station concerned, is measured by all fixed stations which are neighbouring that fixed station which is just standing in communication with the mobile stations in question and signal transit time measurements are than performed by the neighbouring fixed stations receiving these signal bursts with sufficient quality.
Abstract: 1. Method for passing a mobile station on from one radio cell to another within a cellular mobile radio network, in which each radio cell is associated with a fixed station exchanging signals with mobile stations, wherein the reception quality of signal bursts, which have been emitted by the mobile station concerned, is measured by all fixed stations which are neighbouring that fixed station which is just standing in communication with the mobile station in question and signal transit time measurements are than performed by the neighbouring fixed stations receiving these signal bursts with sufficient quality, whereatter the mobile station is then passed on to that fixed station, for which the lowest signal transit time has been ascertained between it and the mobile station, characterised thereby, that after the signal transit time measurement, the fixed station determined for the take-over of the mobile station and the mobile station are switched to a first partial frequency band out of the total frequency range standing at disposal for the mobile radio, that a signal burst, which contains the information, in which partial frequency bands and in which time division multiple access channel time slots the mobile station can communicate with the fixed station, is emitted by the fixed station in this first partial frequency band in a channel time slot of a time multiplex frame (TDMA frame) allocated to it, that the received signal burst is sent back by the mobile station as acknowledgement in a second partial frequency band to the fixed station which is likewise set to this second partial frequency band and that the instant of change-over to the partial frequency bands and time division multiple access channel time slots, which come into question for the intelligence signal, is thereupon communicated by the fixed station to the mobile station.
9 citations
Patent•
06 Dec 1985TL;DR: In this article, a mobile telephone system with stationary and mobile subscriber stations in a wide area of a land mobile network, consisting of a plurality of base stations, is presented, characterized by two radio sections in the respective radio equipment.
Abstract: 1. Mobile telephone system with stationary and mobile subscriber stations in the wide area of a land mobile network, consisting of a plurality of base stations in a mutual spatial arrangement, characterized by two radio sections in the respective radio equipment, of which one is active in the VHF region in thinly populated areas and works with a high transmitting power, and the other is active in the UHF range in densely populated areas and works with a relatively low transmitting power, and by a controller which monitors both radio sections according to predetermined criteria and activates a switch-over when necessary, and which at the same time activates the data signalling between base station and mobile station.
3 citations
01 Oct 1985
TL;DR: The Naval Ocean Systems Center (NOSC) is tasked to design multiple access protocols for the Improved Link-ll program, and an adaptive TDMA scheme, developed at NOSC, known as HAMA (Handoff Assigned Multiple Access).
Abstract: The Naval Ocean Systems Center (NOSC) is tasked to design multiple access protocols for the Improved Link-ll program. Link-ll is an existing tactical data network that has been operational in the United States Navy for many years. The objectives of this project are to design and field improved multiple access protocols which will remedy the shortcomings of the present system. The multiple access protocols examined were TDMA (Time Division Multiple Access) and an adaptive TDMA scheme, developed at NOSC, known as HAMA (Handoff Assigned Multiple Access). Simulations of these two protocols were conducted using the Network Architecture Simulated Test and Evaluation Environment (NASTEE). Example results of these protocol simulations are presented in this paper.
Patent•
20 Jun 1985
TL;DR: In this paper, the authors describe a relay system in which a set of relay nodes are assigned to each relay node by assigning a relay node to relay one of the relay nodes to another relay node.
Abstract: TRANSMISSION SYSTEM MOBILE CELLULAR OR MOBILE POST 46 TEAMS TRANSCEIVERS CAN COMMUNICATE THEM, THE SYSTEM IS ORGANIZED IN A SET OF CELLS, A SET OF WAYS BEING ASSIGNED TO EACH OF THESE CELLS FOR EACH SUBMIT A COMMUNICATION OF ONE OF MOBILE STATIONS, THE POSITION OF THE CELL IN EACH OF THESE CELLS WITH MATCHING RECEIVER ON EACH WAY ALLOCATED TO THE RESPECTIVE CELL FOR RECEIVING SIGNAL POST MOVING INSIDE THE CELL SYSTEM NETWORK CONTROL 32 OPERATING EQUIPMENT IN CONJUNCTION WITH A TRANSFER 70, 66, 48 FOR TRANSFERRING A MOBILE STATION OF A FIRST TO A SECOND MOBILE CELL POSITION WHEN MOVING, ACCORDING TO THE POWER OF SIGNALS OF MOBILE STATION IN CONTROL GROUP CELL ADJACENT TO PREMIERE. EACH OF RECEIVERS 54 POST INCLUDES MEANS 48 TUNING THE RECEIVER ON TRACK CELL CONTIGUOUS, FOR EXAMPLE, BY WAY FREE, OBSERVER OF POSITION SIGNAL IN MOBILE CELL CONTIGUOUS.