WO1997048200A1 - Affectation dynamique pour systeme de telecommunication point a multipoint - Google Patents

Affectation dynamique pour systeme de telecommunication point a multipoint Download PDF

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Publication number
WO1997048200A1
WO1997048200A1 PCT/FI1997/000355 FI9700355W WO9748200A1 WO 1997048200 A1 WO1997048200 A1 WO 1997048200A1 FI 9700355 W FI9700355 W FI 9700355W WO 9748200 A1 WO9748200 A1 WO 9748200A1
Authority
WO
WIPO (PCT)
Prior art keywords
capacity
pmp
substation
substations
transmission
Prior art date
Application number
PCT/FI1997/000355
Other languages
English (en)
Inventor
Pekka Mattila
Sulo Leisio
Original Assignee
Telecom Finland Oy
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from FI960344U external-priority patent/FI2791U1/fi
Priority claimed from FI963523A external-priority patent/FI963523A0/fi
Priority claimed from FI963606A external-priority patent/FI112748B/fi
Application filed by Telecom Finland Oy filed Critical Telecom Finland Oy
Priority to AU30351/97A priority Critical patent/AU3035197A/en
Publication of WO1997048200A1 publication Critical patent/WO1997048200A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/16—Time-division multiplex systems in which the time allocation to individual channels within a transmission cycle is variable, e.g. to accommodate varying complexity of signals, to vary number of channels transmitted
    • H04J3/1682—Allocation of channels according to the instantaneous demands of the users, e.g. concentrated multiplexers, statistical multiplexers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/04—Interfaces between hierarchically different network devices
    • H04W92/045—Interfaces between hierarchically different network devices between access point and backbone network device

Definitions

  • the invention relates to the control of data transmission. More accurately the object of the present invention is a telecommunication method for point to multipoint or PMP- telecommunications system according to the preamble of the claim 1 both point to multipoint or PMP-telecommunications system according to the preamble of the claim 8.
  • PMP-telecommunications system which is formed of a central station and a required amount of substations.
  • the invention can be applied to data transmis ⁇ sion between base station controllers and base stations, and in different telecommuni ⁇ cations networks, industrial automation networks, different investigations, TV- and radio program transfer, video conferences, control, guard, energy and water mainte ⁇ nance and also in transmission of signals by radio or cable ways from a node of a net- work to an operation point used in real estate automation networks.
  • PMP Point-to-MultiPoint
  • PMP-system allocates always a capacity of 2 Mbit/s from the radio way. Then the op- eration of the radio channel is inefficient.
  • the objective of the present invention is to achieve a new and a universal solution to rapidly changing and to different transmission speeds capacity requirements in difficult data transfer conditions.
  • the objective of the present invention is to achieve flexible capacity transmission connections by rapid timetable, in the data transmission of targets otherwise difficultly and costly attainable by the present technique, manually or dynamically allocated.
  • the bi-directional PMP-telecommunications system is formed of a central station and a required amount of substations.
  • the customer inter ⁇ face multiplexed in the system on the PMP-substations operates continuously at de ⁇ sired bit speed, e.g. 2 Mbit/s, but only a transmission capacity corresponding the op ⁇ eration is allocated from the transmission way, e.g. only 4 x 64 kbit/s.
  • inter central station and telecommunications network can any time interval be directed to any PMP-substations any time interval of the multiplexed inter ⁇ face either manually and permanently or directed automatically by any occupancy al ⁇ gorithm or generated by a temporary communication requirement.
  • each substation of the PMP-system has a predetermined capacity multiplexed access interface of a telecommunication service.
  • the transmittable signals for instance time intervals, are freely dynamically allocable by cross-connecting.
  • the central station of the PMP-system includes a cross- connection part and a control logic part, and besides each substation of the PMP- system has a cross-connection part provided with control logic. This makes possible the transmission of various data transmission services, for instance existing and future wired and wireless different frequency band telecommunication services through the same PMP-system.
  • the utility sig- nals e.g.
  • n x 64 kBit/s instead the present 2 Mbit/s, n x 2 Mbit/s or separate 64 kBit/s (300...3400Hz) are transmitted in the system.
  • the utility signals mean transmittable data and time intervals containing network management information. Only these transmittable utility signals strain the transmission way of the PMP-system. Hereby savings are achieved, which the systems utilised nowadays cannot generate for this inflexibility.
  • the transmission way of the PMP-system can be a radio way, optical fibre or copper cable.
  • the telecommunications system is a new dynamic trans ⁇ mission network concept developed from Point-to-MultiPoint radio transmission sys ⁇ tem.
  • the signals meant to be transferable on the central station for instance from the mobile telephone network's base station controller (BSC) or 2 Mbit/s connections brought from exchanges and 64 kbit/s time intervals located inside them are collected and multiplexed by a cross-connection device inside the transferable frame.
  • the frame can be e.g. 2 Mbit/s, 8 Mbit/s, 34 Mbit/s, n x 2 Mbit/s or some other frame in accor ⁇ dance with the predominant standard, in which e.g.
  • 64 kbit/s time intervals are cross- connected by saving capacity time divisionally sequentially to bring further to the transmitter/receiver unit.
  • the signal is directed to the transmission way to bring further to the substation's receivers.
  • the utility signal is collected from the time division transmission way meant to the substation in question from the time division band transmitted by the transmitter.
  • the finding of the right utility signal of the substation is directed by synchronising infor ⁇ mation between central and substations.
  • the need for increase the transmission capac ⁇ ity to the system is attained either on the basis of incoming or outgoing traffic or on the basis of a predetermined traffic profile information.
  • the traffic profile information represents the intensity of the traffic as time function on a particular time interval, for instance on a 24-hour period.
  • the advantages of the invention is to achieve flexible capacities transmission interfaces by rapid timetable, in the data transmission of the targets otherwise difficultly and costly attainable by the present technique, manually or dynamically allocated.
  • the rapidity means that, the equipment is formed of the central station and a great amount of customer / application-wide substation installed in connection with an introduction of a new connection. In connection with the introduction of the new connection there's no need to make modifications physically. It's sufficient with the addition of substa- tions to the network when arising a new traffic requirement.
  • the system is particularly frequency efficient as compared with present.
  • the capacity can be utilised better as compared with the existing systems, because the loss capacity is vanishing small.
  • figure 1 represents the principle of the dynamical PMP-system in a mobile com ⁇ munications network figure 2 represents an example of the location of the time intervals used by the different substations in the transmission frame of the PMP-system figure 3 represents an example of the management of the multiplexed interfaces of the substations in the PMP-system
  • the mobile communication network includes mobile serv- ices switching centre 1, base station controller 2 and number of base stations 5.
  • the base station controller is the mobile communication network's part, which controls the operation of base stations.
  • Data transmission (speech and signal information) between the base station controller and the base station is managed in the systems according to the prior art either by a radio link 6 between two points, optical cable connection 7 or copper cable connection 8.
  • the data transmis- sion between the base station controller and the base stations is dealt with the PMP- system.
  • the PMP-system includes a central station 3, to which has been added a con ⁇ trol logic part required by the system, and a number of substations 4. Each substation of the PMP-system has a predetermined capacity multiplexed customer interface to a base station.
  • the incoming signals are carried from the base station controller to the PMP-system through the cross-connection device 9, to which it has been attached the control logic part for managing the transmission capacity. If wanted the base station controller, the cross-connection device and the substation of the PMP-system can be integrated to one device entity.
  • the signals meant to be transferable on the central sta ⁇ tion e.g.
  • 2 Mbit/s connections brought from the mobile telephone network's base sta- tion controller and 64 kbit/s time intervals located inside them are collected and mul ⁇ tiplexed by cross-connection device into the transferable frame.
  • the frame can be e.g. 2 Mbit/s frame, in which 64 kbit/s time intervals are cross-connected by saving capac ⁇ ity time divisionally sequentially to bring further to the transmitter/receiver unit. From the transmitter the signal is directed to the round radiant or sectored aerial to carry further to the receiver of the substation, which includes also the cross-connection part equipped with the control logic part.
  • the utility signal meant to the substation in question from the time division band transmitted by the transmitter On the substation from the time division transmission way it is collected the utility signal meant to the substation in question from the time division band transmitted by the transmitter. To the respective occupancy situation of the substations are reacted dynamically by increasing utility capacity by means according to the control logic of the system where it is respectively needed.
  • the finding of the right utility signal of opposite station from time division transmission way is directed by synchronising in ⁇ formation between transmission and substations.
  • the need for increase the transmis- sion capacity is attained either on the basis of incoming calls from mobile stations, on the basis of incoming calls from a mobile services switching centre or on the basis of a predetermined traffic profile information.
  • both mobile communication system's and PMP-system 's transmission frame is composed of 32 time intervals.
  • the base station controller 21 there is one 32 time interval connection to the cross-connection device 22 per respective base stations 23.
  • the PMP-system it is transmitted over the radio way to the respective base station only the time intervals in use aligned for it located in the PMP-system's transmission frame.
  • the capacity allocation is dynamic, the base station obtains locally more time intervals for utilisation as long as there are free time intervals to allocate when the mobile station traffic is increasing. So even one base station can obtain for utilisation in case of need even the whole transmission capacity of the PMP-system when the traffic being subtle on the other base stations.
  • the PMP- central station transmits to receivers of the sub or repeating stations locating on the coverage area of its antenna for instance frame construction according to the figure 3, where there are the following bit groups (time intervals):
  • n k a number of a multiplexed time interval of a customer interface
  • m b a bit speed of a time interval k (if adjustable) fo : other control information related to time interval k, such locations of time intervals in a frame construction from the central station to the substations and from the substations to the central station, et cetera fo's information to develop PMP-system's own automatism.
  • the network management system connected to the central station it is arranged re- spectively needed information to the frame's network management time intervals.
  • the essential settings n, m, k, b can be given manually from a network management device (the continuous utilisation of PMP- time intervals) or the settings are taken automatically from the system keeping track of the occupancy situation (the dynamic control of PMP- time intervals).
  • the PMP- central station connects a fixed telenetwork by multiplexing groups.
  • time interval i of a multiplexing-group R to the sub station n to the multiplexing group m to the time interval k at the bit speed of b
  • the information in question is set to the PMP- network management system and to transmit it by the frame construction as presented to a substation in question, which own local network man ⁇ agement unit performs required connections.
  • An actual customer traffic from central station to substations is transmitted in traffic intervals LI ... Lx.
  • the invention can be applied also in transmission of signals utilised in other telecommunications networks, industrial automation networks, different in ⁇ vestigations, TV- and radio program transfer, video conferences, control, guard, energy and water maintenance both real estate automation networks from a node of a network to an operation point.
  • the system can be utilised by any data transmission speed and transferable information can be any type (e.g. speech, image, data, alarms et cetera).
  • Application objects of the invention in a telecommunications networks are transmis- sion connections of mobile- and company networks which are difficultly, slowly and expensively feasible by traditional means and a flexible capacity Wireless Access - solution.
  • the system can be utilised also as a part in sparsely populated area's telecommunications networks between centralizers and upper centres subsistent its top.
  • the system can be utilised also as a transmission system of a new kind of broadband radiosystems.
  • the system can be used as a comprehensive data transmission solution of any sparsely populated or difficultly any other way attainable areas, in case a required capacity keeps in tolerable boundaries.
  • the system can be made, where a prede ⁇ termined fixed part of PMP-system's capacity is utilised in one operation point (for instance mobile filming equipment, compressed MPEG-image, or a map application of a vehicle, mobile rapid data). Then by using a control logic of the system a predeter- mined fixed part of capacity of the system can be directed to employment of a substa ⁇ tion located next to the operation point when the operation point is moving by keeping track of signal intensities, when the mobile application obtains unbroken constant ca ⁇ pacity data transmission connection when moving in the areas of different substations.
  • a prede ⁇ termined fixed part of PMP-system's capacity is utilised in one operation point (for instance mobile filming equipment, compressed MPEG-image, or a map application of a vehicle, mobile rapid data).
  • a modification of the invention relates to utilisation of the cross-connection device to direct in the mobile communications network the optimisation of channel amount of different base stations of a base station network.
  • a cellular network formed of base stations same frequencies repeat in base stations in big cities between 2-5 km and even on rural area between 15 - 50 km, which is smaller than a distance, from which the base stations disturb each others.
  • the same frequencies repeat consequently the base stations utilise separate time intervals.
  • two base stations are chosen, which have different traffic profiles.
  • channels are transferred by using the control logic of the cross-connection device or time intervals in a predetermined moments from a base station to another, when more effective utilisation of radio network's frequency capacity is achieved than in the systems in accordance with the prior art, in which the channel amount of every base station is constant.

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

Abstract

L'invention concerne un système de télécommunication point à multipoint (PMP), constitué d'une station centrale (3) et d'un nombre nécessaire de sous-stations (4). Les caractéristiques de l'invention sont les suivantes: dans le système, chaque sous-station comporte une interface d'accès multiplexé, ayant une capacité déterminée, à un service de télécommunication; des capacités de transmission vers diverses sous-stations peuvent être affectées par connexion croisée; et, dans une voie de transmission, la capacité est affectée par des signaux d'utilité transmis entre la station centrale et les stations de base. La voie de transmission du système PMP est un voie radio, une fibre optique ou un câble en cuivre. Pour gérer la capacité de transmission, la station centrale comporte un module de connexion croisée et un module logique de commande, et chaque sous-station comporte un module de connexion croisée comportant une logique de commande. Dans le système, les sous-stations sont sollicitées de manière dynamique, en ce qui concerne leur situation d'occupation, par une capacité de connexion croisée déterminée par la logique de commande du système, en fonction de leurs capacités requises de trafic et/ou ressources; et, de préférence, la capacité est déterminée en fonction soit du trafic d'arrivée, soit du trafic de départ, soit de capacités requises prédéterminées. La détermination d'un signal d'utilité correct de la sous-station à partir d'une voie de transmission à division dans le temps, ainsi que la transmission du signal de retour, sont commandées par des informations de synchronisation entre la station centrale et les sous-stations.
PCT/FI1997/000355 1996-06-07 1997-06-09 Affectation dynamique pour systeme de telecommunication point a multipoint WO1997048200A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU30351/97A AU3035197A (en) 1996-06-07 1997-06-09 Dynamic allocation for point to multipoint telecommunication system

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
FIU960344 1996-06-07
FI960344U FI2791U1 (fi) 1996-06-07 1996-06-07 Tiedonsiirron ohjausjärjestelmä
FI963523 1996-09-09
FI963523A FI963523A0 (fi) 1996-06-07 1996-09-09 Styrsystem foer dataoeverfoering
FI963606 1996-09-13
FI963606A FI112748B (fi) 1996-06-07 1996-09-13 Tiedonsiirron ohjausjärjestelmä

Publications (1)

Publication Number Publication Date
WO1997048200A1 true WO1997048200A1 (fr) 1997-12-18

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Application Number Title Priority Date Filing Date
PCT/FI1997/000355 WO1997048200A1 (fr) 1996-06-07 1997-06-09 Affectation dynamique pour systeme de telecommunication point a multipoint

Country Status (2)

Country Link
AU (1) AU3035197A (fr)
WO (1) WO1997048200A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999026436A2 (fr) * 1997-11-14 1999-05-27 Telefonaktiebolaget Lm Ericsson (Publ) Dispositif de correlation de donnees dans un reseau de transport
WO1999046876A1 (fr) * 1998-01-28 1999-09-16 Nokia Networks Oy Multiplexage statistique dans un reseau de telecommunications
WO2001050685A1 (fr) * 1999-12-30 2001-07-12 Telefonaktiebolaget Lm Ericsson (Publ) Procede, moyen et systeme de transmission de flux de donnees

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0428407A2 (fr) * 1989-11-15 1991-05-22 Digital Equipment Corporation Liaison de communication intégrée ayant une largeur de bande attribuée dynamiquement et un protocole pour la transmission d'information de répartition
WO1996003841A1 (fr) * 1994-07-21 1996-02-08 Grundig E.M.V. Elektro-Mechanische Versuchsanstal T Max Grundig Gmbh & Co. Kg Procede d'affectation adaptative de la capacite de transmission d'une voie de transmission
WO1996021293A1 (fr) * 1994-12-30 1996-07-11 France Telecom Procede de reconfiguration dynamique d'un signal presentant un entrelacement temporel, recepteur et signal correspondants

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0428407A2 (fr) * 1989-11-15 1991-05-22 Digital Equipment Corporation Liaison de communication intégrée ayant une largeur de bande attribuée dynamiquement et un protocole pour la transmission d'information de répartition
WO1996003841A1 (fr) * 1994-07-21 1996-02-08 Grundig E.M.V. Elektro-Mechanische Versuchsanstal T Max Grundig Gmbh & Co. Kg Procede d'affectation adaptative de la capacite de transmission d'une voie de transmission
WO1996021293A1 (fr) * 1994-12-30 1996-07-11 France Telecom Procede de reconfiguration dynamique d'un signal presentant un entrelacement temporel, recepteur et signal correspondants

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999026436A2 (fr) * 1997-11-14 1999-05-27 Telefonaktiebolaget Lm Ericsson (Publ) Dispositif de correlation de donnees dans un reseau de transport
WO1999026436A3 (fr) * 1997-11-14 1999-07-22 Ericsson Telefon Ab L M Dispositif de correlation de donnees dans un reseau de transport
WO1999046876A1 (fr) * 1998-01-28 1999-09-16 Nokia Networks Oy Multiplexage statistique dans un reseau de telecommunications
US6697364B1 (en) 1998-01-28 2004-02-24 Nokia Corporation Statistical multiplexing in a telecommunications network
WO2001050685A1 (fr) * 1999-12-30 2001-07-12 Telefonaktiebolaget Lm Ericsson (Publ) Procede, moyen et systeme de transmission de flux de donnees

Also Published As

Publication number Publication date
AU3035197A (en) 1998-01-07

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