Classifications

• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04B—TRANSMISSION
  • H04B7/00—Radio transmission systems, i.e. using radiation field
  • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
  • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
  • H04B7/2603—Arrangements for wireless physical layer control
  • H04B7/2606—Arrangements for base station coverage control, e.g. by using relays in tunnels
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04W—WIRELESS COMMUNICATION NETWORKS
  • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
  • H04W16/24—Cell structures
  • H04W16/26—Cell enhancers or enhancement, e.g. for tunnels, building shadow

Definitions

• the invention relates to an assembly and method for accomplishing a radio contact between two radio interfaces and transmitting information between these interfaces.
• FIG. 1 A communication is tried to provide between the mobile phone 5 and base station 1, even the phone is situated behind some obstacle 9, there through the communication is now possible.
• Information is transmitted into or from indoors in the way illustrated in the figure 2.
• Information is transmitted at a radio frequency from a base station 1, BS to an antenna 2 connected to a repeater 3 via a radio frequency cable 4.
• the repeater 3 is a device, which automatically re-transmits signals from one communication to another. Generally the repeater 3 is indoors in the case like this.
• the information is amplified in a radio frequency amplifier 6 of the repeater and transmitted to a hand-held telephone 5 indoors.
• the amplifier 6 is of broad-band type.
• the input electric power is distrib ⁇ uted into several channels whereby levels of the calls at the amplifier may change.
• the cables 4 and 4a from the antennas 2 and 2A to the amplifier must be of radio frequency cable, hence the information transmission by this way is remarkably expensive.
• the call or another information is transmitted into the opposite direction correspondingly.
• figure 1 illustrates a principle figure of the field of the problem
• figure 2 illustrates information transmission in accordance with the prior art
• figure 3 illustrates a solution according to the invention from an embodiment
• figure 4 illustrates receiver and transmitter solutions for a message transmitted from a base station.
• a message at a radio frequency is transmitted from a base station 1 (BS) to an antenna 2 of an upper part 3a of a repeater.
• the upper part 3a of the repeater receives the mes ⁇ sage at the radio frequency and is capable to convert or demodulate the message away from the radio frequency to an audio frequency, wherein the same is transmitted e.g. via a cable 7 into a transmitter at a lower part 3b of the repeater, a carrier wave is modulated and transmitted from the lower part of the repeater as a radio wave along a transmission path 8 to the hand-held telephone 5.
• the repeater is formed of transmitter and receiver circuits of an NMT- telephone and comprises the upper part (master) and the lower part (slave). For pro ⁇ tecting these circuits a casing or a corresponding is provided.
• a central unit controls the communication from the inner part to the outer part and vice versa and it is capable to recognise signalising commands by which the call is directed to receivers and by which the repeater is controlled both is capable to convert a radio frequency to a audio frequency and vice versa.
• the transmitting and receiving frequencies of the lower part of the repeater corre ⁇ sponds to the frequencies of the base station.
• the repeater composed of the transmitter and receiver circuits of the NMT-telephone may lead to a power decreasing when transmitting, in most cases even a low power is adequate, because the spaces in ⁇ doors are limited.
• the wires to be used are economical. Therefore it is possible that by using a ramifier means from the upper head or the master section of the repeater may extend several wires, the ends thereof are placed different rooms or spaces such, that the message can be transmitted to the desired locations.
• the solution according to the invention in its simplest mode connects at mobile telephone traffic of frequency dis ⁇ tributed type only one call at a time. Depending on the number of calls it is possible to choose a system of desired extent.
• the invention is especially preferred for a low density call connection.
• Any copper cable, light cable, radio link or e. g. double wire connection can be used as the transmission path 7 between the upper and lower heads of the repeater.
• the re ⁇ peater must be capable to receive messages and to transmit the same further to the transmission path.
• the method may transmit mobile telephone traffic of time, code or frequency distributed type.
• FIG 4 there is illustrated in a more precise way a message transmission in one direction from a base station to a mobile telephone.
• the message transmitted from the base station 1 is transmitted, the message is received at an upper head 32 of a repeater by a receiver circuit, the message is converted to be of audio frequency type and the message is guided via the communi ⁇ cation path 7 between the lower and upper parts 3b, 3a to the transmitter circuit 3b of the lower part of the repeater, while a speech of basic frequency modulates the radio frequency of the radio transmitter 3b the radio waves are transmitted to the receiver 5 of the mobile phone.

Landscapes

• Engineering & Computer Science (AREA)
• Computer Networks & Wireless Communication (AREA)
• Signal Processing (AREA)
• Mobile Radio Communication Systems (AREA)

Applications Claiming Priority (3)

Publications (1)

Family

ID=8538020

Family Applications (1)

Country Status (10)

Families Citing this family (7)

Family Cites Families (3)

• 1993
  • 1993-05-27 FI FI932433A patent/FI108382B/fi active
• 1994
  • 1994-05-27 CN CN 94192235 patent/CN1124549A/zh active Pending
  • 1994-05-27 HU HU9503379A patent/HU215895B/hu not_active IP Right Cessation
  • 1994-05-27 EP EP94916243A patent/EP0705502A1/en not_active Withdrawn
  • 1994-05-27 JP JP7500274A patent/JPH08510605A/ja active Pending
  • 1994-05-27 WO PCT/FI1994/000213 patent/WO1994028641A1/en not_active Application Discontinuation
  • 1994-05-27 AU AU67978/94A patent/AU6797894A/en not_active Abandoned
  • 1994-10-17 EE EE9400287A patent/EE03327B1/xx not_active IP Right Cessation
• 1995
  • 1995-11-22 LV LVP-95-352A patent/LV11509B/en unknown
  • 1995-11-23 NO NO954732A patent/NO954732D0/no not_active Application Discontinuation

Non-Patent Citations (1)

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