WO2000064204A1 - Procede et dispositif pour eviter la transmission d'informations redondantes dans un reseau de communication numerique - Google Patents

Procede et dispositif pour eviter la transmission d'informations redondantes dans un reseau de communication numerique Download PDF

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Publication number
WO2000064204A1
WO2000064204A1 PCT/SE2000/000742 SE0000742W WO0064204A1 WO 2000064204 A1 WO2000064204 A1 WO 2000064204A1 SE 0000742 W SE0000742 W SE 0000742W WO 0064204 A1 WO0064204 A1 WO 0064204A1
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WO
WIPO (PCT)
Prior art keywords
information
frame
transmission
silence
frames
Prior art date
Application number
PCT/SE2000/000742
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English (en)
Inventor
Torbjörn SILLÉN
Original Assignee
Telia Ab
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
Application filed by Telia Ab filed Critical Telia Ab
Publication of WO2000064204A1 publication Critical patent/WO2000064204A1/fr

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Classifications

    • 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
    • H04W92/12—Interfaces between hierarchically different network devices between access points and access point controllers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/04—Network layer protocols, e.g. mobile IP [Internet Protocol]

Definitions

  • the present invention relates to procedures and devices for control of transmission of information in a transmitting subnetwork in a time division multiplex mobile communication system ⁇
  • Mobile communication systems such as GSM can broadly be divided into two different subnetworks.
  • a radio subnetwork and a (packet) transmitting subnetwork consisting of more or less fixed terrestrial connections between the radio 15 subnetwork and public telecommunication networks.
  • information is exchanged between mobile telephone stations and radio base stations via a radio interface.
  • the radio base stations transmit the information from the radio subnetwork to units in the transmitting 20 subnetwork, which in their turn transmit the information to public telecommunication networks, or back to mobile telephone stations in the radio subnetwork.
  • Frames are sequences of information bits, the length of which can vary between different types of systems.
  • the physical transmission of these frames is made in time division multiplex systems, such as GSM, in the time slots in one for the expert well-known way.
  • the mobile telephone station can analyse the sound information that is generated by a user. If the analysis finds that the user is silent, a synthetic silence information is crated in the frames, at which only a fraction of the frames are allowed to be transmitted via the radio interface. The transmission of the frames consequently are made in a broken sequence of frames, which means that the load of the time slots is reduced.
  • an unbroken sequence of frames are recreated, which, irrespective of whether they contain sound or silence information, then are transmitted via reserved connections to other units in the transmitting subnetwork.
  • a plurality of radio base stations are usually connected to a base control station, which results in that a plurality of reserved connections are utilised to transmit silence information with a high level of redundancy. This identifies a problem: How avoid transmission of redundant, and by that unnecessary, information frames in a transmitting subnetwork in a mobile communication system ?
  • One aim of the invention is to solve the problem: How avoid transmission of redundant, and by that unnecessary, information frames in a transmitting subnetwork in a mobile communication system ?
  • the invention achieves this aim by interpreting the frame information and transmiting this depending on this interpretation. More exactly, the problem is solved as claimed in patent claim number one, in which is presented a procedure for control of transmission of information in a packet switched subnetwork in a digital time division multiplex mobile communication system.
  • the subnetwork transmits frames containing information from a station in a radio subnetwork to an adaptation unit in the transmitting subnetwork and is characterised in that it includes the steps : reception of information frames from the radio subnetwork; - interpretation of at least a fraction of the content in the information frames, at which the interpretation at least determines one type of frame for each of the received information frames, at which the type of frame is one of at least three types of frames, at which a first type of frame is a speech frame that includes sound information, a second type of frame is a silence frame, which includes silence information, and a third type of frame is a faulty frame, which includes a frame error indicator; - transmission of the information in the received information frames, at which the transmission is made depending on the interpretation.
  • One advantage of the invention is that it allows a reduction of the utilisation of resources in a transmitting subnetwork, which means higher efficiency, and consequently a lower cost.
  • Figure 1 shows a schematic representation of a digital communication system in which the present invention is intended to be used.
  • Figure 2 shows a schematic block diagram over a device according to the invention.
  • FIG. 3 illustrates schematically information frames that are transmitted according to the invention.
  • Figure 4 shows a flow chart over a method according to the invention .
  • FIG 1 illustrates in a schematic way a mobile communication system 100 connected with an external telephone network 103 of traditional (PSTN) kind, an external data network 104, which is exemplified by an ISDN network, and a second mobile communication system 105 of a generic (PLMN) type.
  • PSTN traditional
  • PLMN generic
  • GSM-system For the sake of clarity, a typical GSM-system is used to illustrate the invention. Consequently both terminology and the general network structure are known to the expert in the field. However, the selection of GSM as illustration should not be regarded as a limitation. The invention is applicable in all telecommunication networks in which there is a possibility to sense/read silence in an established speech connection and as a result of the sensing/reading limits the amount of transmitted silence information.
  • the mobile communication system 100 is divided into two subnetworks, a radio subnetwork 101, and a transmitting subnetwork 102.
  • a radio subnetwork 101 there is a first 110 and a second 112 mobile terminal in radio contact via respective radio interface 114, 116, with a first 118 and a second radio base station 120.
  • a real radio subnetwork includes more than two mobile terminals.
  • each of the radio base stations 118, 120 normally manages connections with a number of tens of mobile terminals at a time.
  • the borderline between the radio subnetwork 101 and the transmitting subnetwork 102 is illustrated by a dashed borderline between them.
  • certain functions in the radio base stations 118, 120 constitute a part of the transmitting subnetwork 102 in which the invention is realised.
  • Each of the radio base stations 118, 120 are connected via a first 122 and a second fixed connection 124 to a base control station 126.
  • the base control station 126 has, among other things, as its task to collect transmission traffic of comparatively low transmission speed from the majority of the radio base stations, to transmission traffic with comparatively high transmission speed to a mobile services switching centre 128.
  • a mobile services switching centre 128 As Figure 1 clearly illustrates, at least one more base control station 136, with additional connections 138 to radio base stations, is connected to the mobile services switching centre 128.
  • a second mobile services switching centre 130 serves as a gate for traffic to the other networks 103,104,105.
  • the mobile communication system 100 also can include more mobile services switching centres, as is indicated by connections 132 at the second mobile services switching centre 130.
  • connections are set up, held, and disconnected between subscribers in the shown networks 100,103,104,105. Even if only mobile terminals 110,112 are shown, it is well known that subscribers can be connected to any of the networks, and be connected with each other in more or less just any combinations.
  • the Figures 2 and 3 illustrate more in detail a speech connection between a first terminal and a second terminal that is established and controlled according to the invention.
  • the first terminal is a mobile terminal 201 in the radio subnetwork (101 in Figure 1)
  • the second terminal is a telephone 219 in a telephone network 217.
  • the transmission of information that is relevant in this context is the transmission that is directed from the mobile terminal 201 to the telephone 219.
  • a GSM network structure has been selected for this example.
  • information preferably digitised speech generated by a terminal user
  • the speech information is digitally represented in speech frames, the content of which is transmitted in physical channels in form of time slots in the radio interface.
  • the information is transmitted via a first gate 207, and a digital network 209, to a base control unit 213, through a second gate 211.
  • the first 207 and the second gate 211 are illustrated as a part of the radio base station 205, respective the base control unit 213.
  • These gates 207, 211 can be physically separated units and be in physical connection with other units by known technology.
  • the information is transmitted according to known technology to the second terminal 219, via a mobile services switching centre 215, the function of which also includes a gate function for connection to the telephone network 217.
  • the transmission via the radio interface 213 utilises the within GSM well known technology of discontinuous transmission (DTX) .
  • DTX discontinuous transmission
  • the mobile terminal 201 detects and analyses the sound that the user produces and transmits information frames depending on whether sound or silence is detected. Sound is transmitted in continuous speech frames, but silence is transmitted discontinuously, that is, less frequent than speech frames, in so called silence frames.
  • the transmitted frames include an indicator (SP-indicator) about which type of information they contain, at which an information frame containing speech has an SP-indicator the value of which is other than zero, and silence frames are indicated by a zero.
  • the content of the frames represents the sound the silence that is detected, and for the silence information an indicator, SID-indicator, is used, the value of which is used to categorise the content of the transmitted silence information.
  • FIG 3 shows a sequence of TDMA information frames 300, which, according to known technology, are generated in the radio base station (205 in Figure 2) .
  • An appointed frame 301 contains an information field 303, and a signalling field 305.
  • the information field contains speech information, silence information, or data information, from the mobile terminal 201.
  • the signalling field contains signalling information intended for other units in the network. Reception of the TDMA information frames is made in the base control station 213, which in its turn forwards the information to receiving terminal 219 via the mobile services switching centre 215 and the telephone network 217.
  • the TDMA information frames 300 are analysed with regard to their contents, as will be described below.
  • the information is rearranged in IP data packets according to well known TCP/IP, alternatively UDP/IP, technology and is transmitted via an IP-network 209 to the second gate 211, in which the TDMA information frames 300 are recreated and forwarded to the base control unit 213.
  • a TDMA-frame (301 in Figure 3) containing information received from the mobile terminal (201 in Figure 2) is created.
  • the information can include speech information as well as silence information, at which identification of the different types of information is made by the SP-indicator and the SID-indicator, the values of which are also incorporated in the TDMA-frame.
  • the SP-indicator and the SID-indicator are interpreted to make possible a decision about transmitting the TDMA-frame further to the base control unit (213 in Figure 2).
  • the base control unit (213 in Figure 2) Certainly are in this interpretation also included other factors that are of importance for decision of transmission. Such a factor is of course whether one from the mobile terminal (201 in Figure 2) received frame is received faulty, that is corrupted, or not. An indicator for this factor is called BFI-indicator .
  • a decision step 405 the SP-, SID- and BFI-indicators are utilised according to the following simple logic:
  • the TDMA-frames are arranged in data packets according to the to expert well known IP-standard, that is, IP-packets, at which for instance an IP-address for receiving unit is connected to the IP-packet.
  • IP-packets at which for instance an IP-address for receiving unit is connected to the IP-packet.
  • the intended addressee is preferably the receiving base control unit, and more exactly its gate (211 in Figure 2) .
  • TDMA-frames arranged in IP- packets are transmitted via the IP-network (209 in Figure 2) according to well known and standardised IP-technology.
  • a reception step 411 the IP-packets are received, according to well known IP-technology, by the addressee, which in this example consists of the second gate (211 in Figure 2) connected to the base control unit (213 in Figure 2) .
  • a recreating step 413 the in the radio base station created TDMA-frames are recreated from the information in the received IP-packets, after which the base control unit (213 in Figure 2) forwards the information according to previously discussed GSM-technology via the mobile services switching centre (215 in Figure 2) to the second terminal (219 in Figure 2) connected to the telecommunication network (217 in Figure 2) .
  • the base control unit (213 in Figure 2) forwards the information according to previously discussed GSM-technology via the mobile services switching centre (215 in Figure 2) to the second terminal (219 in Figure 2) connected to the telecommunication network (217 in Figure 2) .

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

Abstract

L'invention concerne un procédé et un dispositif de commande de transmission d'informations dans un sous-réseau de transmission d'un système de communication mobile à multiplexage numérique par répartition dans le temps. Le sous-réseau transmet des trames contenant des informations, d'une station (201) de sous-réseau radio à une unité d'adaptation (213) du sous-réseau de transmission, le procédé étant caractérisé par le fait qu'il comporte les étapes consistant à: recevoir des trames d'informations provenant du sous-réseau radio ; interpréter au moins une fraction du contenu des trames d'informations, cette interprétation déterminant au moins un type de trame pour chacune des trames d'informations reçues, le type de trame étant compris dans un groupe d'au moins trois types de trames : un premier type de trame constituant une trame de paroles qui comporte des informations sonores, un deuxième type de trame constituant une trame de silence qui comporte des informations de silence, un troisième type de trame constituant une trame défectueuse qui comporte un indicateur d'erreur de trame ; et transmettre les informations contenues dans les trames d'informations reçues, la transmission étant mise en oeuvre en fonction de l'interprétation.
PCT/SE2000/000742 1999-04-19 2000-04-19 Procede et dispositif pour eviter la transmission d'informations redondantes dans un reseau de communication numerique WO2000064204A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9901381-5 1999-04-19
SE9901381A SE9901381L (sv) 1999-04-19 1999-04-19 Metod och anordning i ett digitalt kommunikationsnät

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004082187A2 (fr) * 2003-03-11 2004-09-23 Cisco Technology, Inc. Systeme et procede de compression de donnees dans un environnement de communication
EP1757033A2 (fr) * 2004-06-09 2007-02-28 Vanu, Inc. Reduction de bande passante d'une liaison terrestre
US7221684B1 (en) 2002-01-08 2007-05-22 Cisco Technology, Inc. Increasing network efficiency using packet compression and decompression
US7733793B1 (en) 2003-12-10 2010-06-08 Cisco Technology, Inc. System and method for suppressing silence data in a network environment

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993000778A1 (fr) * 1991-06-21 1993-01-07 Gpt Limited Transmission d'un signal telephonique
US5299198A (en) * 1990-12-06 1994-03-29 Hughes Aircraft Company Method and apparatus for exploitation of voice inactivity to increase the capacity of a time division multiple access radio communications system
EP0662778A2 (fr) * 1994-01-11 1995-07-12 Ntt Mobile Communications Network Inc. Système de communication radio mobile
WO1996028809A1 (fr) * 1995-03-10 1996-09-19 Telefonaktiebolaget Lm Ericsson Agencement et procede concernant la transmission vocale et systeme de telecommunication comportant un tel agencement
WO1996035310A1 (fr) * 1995-05-04 1996-11-07 Interwave Communications International, Ltd. Complement cellulaire de reseau public a cable
WO1997028664A1 (fr) * 1996-01-29 1997-08-07 Nokia Telecommunications Oy Transmission vocale dans un reseau de communication mobile
WO1998041046A2 (fr) * 1997-03-13 1998-09-17 Nokia Telecommunications Oy Procede de transmission et systeme radio cellulaire
WO1999035875A1 (fr) * 1997-12-31 1999-07-15 Nokia Networks Oy Procede de transmission discontinue atm

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5299198A (en) * 1990-12-06 1994-03-29 Hughes Aircraft Company Method and apparatus for exploitation of voice inactivity to increase the capacity of a time division multiple access radio communications system
WO1993000778A1 (fr) * 1991-06-21 1993-01-07 Gpt Limited Transmission d'un signal telephonique
EP0662778A2 (fr) * 1994-01-11 1995-07-12 Ntt Mobile Communications Network Inc. Système de communication radio mobile
WO1996028809A1 (fr) * 1995-03-10 1996-09-19 Telefonaktiebolaget Lm Ericsson Agencement et procede concernant la transmission vocale et systeme de telecommunication comportant un tel agencement
WO1996035310A1 (fr) * 1995-05-04 1996-11-07 Interwave Communications International, Ltd. Complement cellulaire de reseau public a cable
WO1997028664A1 (fr) * 1996-01-29 1997-08-07 Nokia Telecommunications Oy Transmission vocale dans un reseau de communication mobile
WO1998041046A2 (fr) * 1997-03-13 1998-09-17 Nokia Telecommunications Oy Procede de transmission et systeme radio cellulaire
WO1999035875A1 (fr) * 1997-12-31 1999-07-15 Nokia Networks Oy Procede de transmission discontinue atm

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
M. MOULY, M.B. PAUTET: "The GSM system for mobile communications. subsection 3.3.2.2", 1992, pages 164 *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7221684B1 (en) 2002-01-08 2007-05-22 Cisco Technology, Inc. Increasing network efficiency using packet compression and decompression
WO2004082187A2 (fr) * 2003-03-11 2004-09-23 Cisco Technology, Inc. Systeme et procede de compression de donnees dans un environnement de communication
WO2004082187A3 (fr) * 2003-03-11 2005-01-27 Cisco Tech Ind Systeme et procede de compression de donnees dans un environnement de communication
US7733793B1 (en) 2003-12-10 2010-06-08 Cisco Technology, Inc. System and method for suppressing silence data in a network environment
EP1757033A2 (fr) * 2004-06-09 2007-02-28 Vanu, Inc. Reduction de bande passante d'une liaison terrestre
EP1757033A4 (fr) * 2004-06-09 2009-04-22 Vanu Inc Reduction de bande passante d'une liaison terrestre

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Publication number Publication date
SE9901381L (sv) 2000-10-20
SE9901381D0 (sv) 1999-04-19

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