EP1120005A2 - Procede de transmission d'informations numeriques structurees en groupes de bits conformement a un protocole con u pour une autre structure de groupes de bits - Google Patents

Procede de transmission d'informations numeriques structurees en groupes de bits conformement a un protocole con u pour une autre structure de groupes de bits

Info

Publication number
EP1120005A2
EP1120005A2 EP99970252A EP99970252A EP1120005A2 EP 1120005 A2 EP1120005 A2 EP 1120005A2 EP 99970252 A EP99970252 A EP 99970252A EP 99970252 A EP99970252 A EP 99970252A EP 1120005 A2 EP1120005 A2 EP 1120005A2
Authority
EP
European Patent Office
Prior art keywords
bit groups
protocol
transmission
information
oct53
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP99970252A
Other languages
German (de)
English (en)
Inventor
Jürgen WIENBÖKER
Michael Paar
Gerhard Vogt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP1120005A2 publication Critical patent/EP1120005A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing
    • H04Q11/0428—Integrated services digital network, i.e. systems for transmission of different types of digitised signals, e.g. speech, data, telecentral, television signals
    • H04Q11/0478—Provisions for broadband connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/54—Store-and-forward switching systems 
    • H04L12/56—Packet switching systems
    • H04L12/5601—Transfer mode dependent, e.g. ATM
    • H04L2012/5614—User Network Interface
    • H04L2012/5616—Terminal equipment, e.g. codecs, synch.
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/54—Store-and-forward switching systems 
    • H04L12/56—Packet switching systems
    • H04L12/5601—Transfer mode dependent, e.g. ATM
    • H04L2012/5638—Services, e.g. multimedia, GOS, QOS
    • H04L2012/5646—Cell characteristics, e.g. loss, delay, jitter, sequence integrity
    • H04L2012/5652—Cell construction, e.g. including header, packetisation, depacketisation, assembly, reassembly
    • H04L2012/5653—Cell construction, e.g. including header, packetisation, depacketisation, assembly, reassembly using the ATM adaptation layer [AAL]
    • H04L2012/5654—Cell construction, e.g. including header, packetisation, depacketisation, assembly, reassembly using the ATM adaptation layer [AAL] using the AAL1
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/54—Store-and-forward switching systems 
    • H04L12/56—Packet switching systems
    • H04L12/5601—Transfer mode dependent, e.g. ATM
    • H04L2012/5638—Services, e.g. multimedia, GOS, QOS
    • H04L2012/5665—Interaction of ATM with other protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/54—Store-and-forward switching systems 
    • H04L12/56—Packet switching systems
    • H04L12/5601—Transfer mode dependent, e.g. ATM
    • H04L2012/5638—Services, e.g. multimedia, GOS, QOS
    • H04L2012/5671—Support of voice

Definitions

  • the different transmission methods are particularly necessary for communication networks that have a hybrid mix of different transmission technologies.
  • more modern, faster transmission technologies are used in the core area of communication networks - e.g. SDH or ATM technology - while in the periphery, also known as the "last mile", proven transmission technologies are often used - e.g. PCM30 or GSM technology.
  • PCM30 or GSM technology e.g. PCM30 or GSM technology.
  • Information is transmitted, for example, during a telephone call from a telephone set to a cell phone - first via a line-oriented first access network, then via a packet-oriented core network and finally via a radio-oriented second access network.
  • such a transmission is also referred to as transmission via several “subnets”, the two access networks mentioned and the core network being three examples of subnetworks.
  • Protocols are used to control the transmission of information, with subnet-specific pro tokolle are provided. They are matched to the transmission technology used in the subnetworks and usually have significant differences, provided that the technology used is based on different transmission concepts and their technical characteristics must be taken into account in the protocols when controlling the transmission of information.
  • Examples of protocols for the transmission of voice information digitized after pulse code modulation - also called PCM - are the ITU-T standard G.704 for a line-oriented transmission technology and the ITU-T standard 1.363.1 1996 for a packet-oriented transmission technology.
  • Speech information is usually not transmitted using a PCM method, but rather as compressed, digitized speech information, which is why, for example, only 32 Kbit / s for DECT systems and only 13 Kbit / s for GSM systems are required per connection
  • the controlled transmission of user information in accordance with a protocol usually takes place bit-parallel in the case of digital user information, i.e. in bit groups with a fixed number of bits, the number of Bits of a bit group often correspond to a power to the base two - the transmission of the user information according to the protocol takes place in bit groups of 2 N bits each.
  • bit groups with a fixed number of bits
  • the number of Bits of a bit group often correspond to a power to the base two - the transmission of the user information according to the protocol takes place in bit groups of 2 N bits each.
  • the information part of an ATM cell becomes useful information with bit groups
  • bit groups of eight bits of the speech information digitized according to the PCM method are inserted into the information part of ATM cells with bit groups of eight bits, so that the transmission capacity of the information part of the ATM cells is fully used.
  • the ATM transmission protocol AAL1 is therefore regular Structure of eight bits of the speech information digitized according to the PCM process optimally coordinated.
  • useful information is to be transmitted to an increasing extent, which is structured in bit groups of less than eight bits, e.g. Speech information that is digitized in bit groups, for example of four bits, using compressive adaptive differential pulse code modulation - also called ADPCM.
  • a transmission with the known, on bit groups of e.g. Eight bits of transmission protocols have not yet been provided.
  • the invention is therefore based on the object of designing a method for transmitting digital user information structured in bit groups in accordance with a protocol which is designed for a different bit group structure.
  • the object is achieved by the features of patent claim 1.
  • the essential aspect of the invention can be seen in the fact that the useful information is structured in first bit groups of 2 N bits each, that a transmission takes place in accordance with the protocol in second bit groups of 2 M bits each, M being greater than N, that in each case up to the first bit groups consecutive to 2 MN are combined to form a second bit group, and the first bit groups combined to form the second bit groups are transmitted in accordance with the protocol.
  • the main advantage of the method lies in the fact that the first bit groups here are "transferable with the protocol. Another advantage is that it that optimum utilization of the transmission capacity can be achieved an existing under the Protocol connection as 2 MN combined first bit groups result in exactly a second bit group of 2 M bits, ie every bit of the second bit group is used.
  • the transmission of the second bit groups with the help of ATM cells - This enables the method according to the invention to be advantageously used in a modern ATM subnet. Another advantage is that, in combination with the features of claim 1, a minimum number of ATM cells is required for the transmission of the voice information and thus the transmission capacity can be used to the maximum for the transmission of further information.
  • the protocol according to the international ITU-T standard is 1.363.1 - claim 3.
  • the useful information inserted into the ATM cells in accordance with the method according to the invention can advantageously be communicated to the communication devices of various manufacturers, that already implement the standard 1.363.1.
  • the time requirements that apply to the transmission of voice information are guaranteed by the control properties of the control information inserted into the information parts of the ATM cells in accordance with the AAL1 protocol.
  • the transmission of the second bit groups takes place with the aid of internet packets - claim 4.
  • an optimized time division between the processing time and the preparation time for processing Internet packets can also be found in the communication devices.
  • the first bit groups are transmitted in accordance with a further protocol before being combined into the second bit groups - claim 5
  • the advantage associated with this is that the useful information can be fed to a first subnetwork, in which the protocol is used, via at least a second subnetwork, a proven transmission technology being used in the second subnetwork, for example, and a more modern transmission technology being used in the first subnetwork.
  • Hybrid subnets can thus be combined to form a communication network.
  • a second bit group transmitted according to the protocol is divided into the original up to 2 MN consecutive first bit groups.
  • Claim 6 is advantageously used to recover the original useful information after transmission in accordance with the protocol .
  • the original first bit groups are transmitted according to an additional protocol after division from the second bit groups - claim 7.
  • hybrid communication networks can be set up, i.e. For example, ATM systems can be combined with GSM systems.
  • the second bit groups transmitted in accordance with the protocol are transmitted in accordance with the additional protocol - claim 8.
  • the useful information inserted in the second bit groups is advantageous, ie without taking the original useful information from the second bit groups , directly in the third protocol added, which enables a faster conversion to the third protocol.
  • the user information (NI) represents digitized speech information - claim 9.
  • NI user information
  • the speech information is digitized into first bit groups of four bits in accordance with an adaptive differential pulse code modulation method - claim 10.
  • the number of sub-network-specific required for the transmission of the speech information can be Transmission units, e.g. ATM cells or Internet packets can advantageously be reduced by at least a factor of two.
  • FIG. 2 shows an ATM cell in accordance with the AAL1 protocol, to which useful information is supplied in accordance with the method according to the invention.
  • FIG. 1 shows an example of a communication network (KN) which consists of three subnetworks (TN1 - TN3), the method according to the invention for the first subnetwork (TN1) according to the criteria used there, on bit groups of eight bits each (OCT7) - OCT53) - hereinafter also called octets -, designed protocol (AAL) is provided.
  • the Transmission takes place in the first subnet (TN1), for example by ATM cells (AZ) or Internet packets (IP).
  • AZ ATM cells
  • IP Internet packets
  • the second sub-network (TN2) is connected to the first sub-network (TN1) by a first communication device (KE1).
  • the information is transmitted, for example, in accordance with a second protocol (PROT2) designed, for example, for bit groups of four bits (QRT1 to QRT94) - also called quartets in the following.
  • the third sub-network (TN3) is connected to the first sub-network (TN1) by a second communication device (KE2).
  • the information is transmitted in the third subnet (TN3) according to a third protocol (PROT3), the third protocol (PROT3), for example, on quartets - indicated in FIG. 1 within the third subnet (TN3) by an uninterrupted arrow - or on octets - is indicated in FIG. 1 within the third subnetwork (TN3) by a dashed arrow.
  • FIG. 2 shows an example of an ATM cell (AZ) that is structured in an octet (OCT7 - OCT53).
  • the ATM cell (AZ) consists of a head part (KT) comprising five octets (OCT1 - OCT5) and an information part (IT) comprising 48 octets (OCT6 - OCT53).
  • KT head part
  • IT information part
  • AAL1 protocol AAL
  • the first octet (OCT6) contains control information (AALH) in the information part (IT) for controlling the transmission of
  • AALH control information
  • SP Voice information
  • NI user information
  • QRT1 - QRT94 94 quartets
  • SP digitized according to a compressive adaptive differential pulse code modulation method and structured in quartets are.
  • This voice information (SP) is fed to the first subnet (TN1), in which the information is transmitted in accordance with the AAL protocol (AAL), through the second subnet (TN2), in which the information is transmitted in accordance with the second protocol (PROT2), wherein the conversion from the second protocol (PROT2) to the first protocol (AAL) takes place in a first communication device (KE1).
  • TN1 the AAL protocol
  • PROT2 second protocol
  • KE1 first communication device
  • two successive quartets (QRT1 - QRT94) of the compressed digital voice information (SP) are combined into octets (OCT7 - OCT53) in the first communication device (KE1) and according to the AAL1 protocol (AAL) in the information part (IT) an ATM cell (AZ) inserted, the octets (0CT7 - OCT53) of the information part (IT) being occupied in ascending order.
  • the quartets QRT1 and QRT2 are combined to form an octet (OCT7) and inserted into the ATM cell (AZ) shown in FIG. 2 as the seventh octet (OCT7).
  • ATM cell (AZ) this ATM cell (AZ) is transmitted in the first subnetwork (TN1) from the first communication device (KE1) to the second communication device (KE2).
  • the insertion of the quartets (QRT1 - QRT94) transmitted by the second subnet (TN2) is continued in a further ATM cell (AZ) with the information part (IT) still empty.
  • the ATM cells (AZ) are transmitted in the first subnetwork (TN1) in accordance with the protocol 1.363.1 standardized in the ITU-T, in which control information is inserted into the information part (IT) of the ATM cells (AZ) (AALH) the special runtime requirements, which exist when transmitting voice information (SP) via a packet-oriented first subnet (TNl), are regulated.
  • voice information (SP) digitized and structured in octets by a pulse code modulation method - indicated in FIG. 1 by a dashed arrow labeled PCM30 - are transmitted.
  • the compression of the speech information (SP) according to the adaptive differential pulse code modulation method then takes place in the first communication device (KE1).
  • the transmitted octets (OCT7 - OCT53) are in each case in the second communication device (KE2) removed to 2 first bit groups (QRT1 - QRT94) and combined to the original sequence of first bit groups (QRT1 - QRT94).
  • This sequence of first bit groups (QRT1 - QRT94) is optionally fed to the third subnetwork (TN3) and transmitted in it according to the third protocol (PROT3).
  • the first bit groups (QRT1-QRT94) are not removed from the transmitted second bit groups (OCT7-OCT53), which the third subnetwork (TN3) directly for further transmission according to the third protocol (PROT3) be fed.
  • the design of the third protocol for the two alternatives described depends on the structure of the user information (NI) supplied.
  • IP Internet packets
  • the quartets QRT1 - QRT1 - representing the compressed speech information (SP)
  • SP compressed speech information
  • OCT7 - OCT53 octets
  • KE1 - KE2 two communication devices
  • the length of the information section (IT) determines how many quartets (QRT1 - QRT94) combined into octets (OCT7 - OCT53) can be transmitted with an Internet packet (IP), which means that a different number of Internet packets (IP) per second, if necessary for the transmission of compressed voice information (SP) is required than the approx. 85 ATM cells calculated in the example above.
  • IP Internet packet
  • SP compressed voice information

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

L'invention concerne un procédé selon lequel des informations vocales (SP) numériques comprimées en des premiers groupes de bits (QRT1-QRT94) comprenant 2<N> bits sont, par réunion de chaque fois jusqu'à 2<M-N> premiers groupes de bits (QRT1-QRT94) en un second groupe de bits (OCT7-OCT53) comportant 2<M> bits (M étant plus grand que N), transmises conformément à un protocole (AAL) conçu pour les seconds groupes de bits (OCT7-OCT53), dans des cellules ATM (AZ) ou des paquets inter-réseaux (IP). Ainsi, les informations vocales (SP) comprimées peuvent être transmises efficacement également conformément au protocole (AAL) conçu pour des groupes de 2<M> bits.
EP99970252A 1998-10-05 1999-10-01 Procede de transmission d'informations numeriques structurees en groupes de bits conformement a un protocole con u pour une autre structure de groupes de bits Withdrawn EP1120005A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19845754 1998-10-05
DE1998145754 DE19845754A1 (de) 1998-10-05 1998-10-05 Verfahren zum Übermitteln von digitalen, in Bitgruppen strukturierten Informationen nach Maßgabe eines auf eine andere Bitgruppenstruktur ausgelegten Protokolls
PCT/DE1999/003171 WO2000021327A2 (fr) 1998-10-05 1999-10-01 Procede de transmission d'informations numeriques structurees en groupes de bits conformement a un protocole conçu pour une autre structure de groupes de bits

Publications (1)

Publication Number Publication Date
EP1120005A2 true EP1120005A2 (fr) 2001-08-01

Family

ID=7883416

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99970252A Withdrawn EP1120005A2 (fr) 1998-10-05 1999-10-01 Procede de transmission d'informations numeriques structurees en groupes de bits conformement a un protocole con u pour une autre structure de groupes de bits

Country Status (3)

Country Link
EP (1) EP1120005A2 (fr)
DE (1) DE19845754A1 (fr)
WO (1) WO2000021327A2 (fr)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2124610C (fr) * 1994-05-30 1998-10-06 Charles Kevin Huscroft Interface utilisateur-reseau integree

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0021327A3 *

Also Published As

Publication number Publication date
WO2000021327A2 (fr) 2000-04-13
DE19845754A1 (de) 2000-04-13
WO2000021327A3 (fr) 2000-07-06

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