WO2000013446A1 - Procede de transmission d'informations vocales dans un systeme de communication radio - Google Patents

Procede de transmission d'informations vocales dans un systeme de communication radio Download PDF

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Publication number
WO2000013446A1
WO2000013446A1 PCT/DE1999/002729 DE9902729W WO0013446A1 WO 2000013446 A1 WO2000013446 A1 WO 2000013446A1 DE 9902729 W DE9902729 W DE 9902729W WO 0013446 A1 WO0013446 A1 WO 0013446A1
Authority
WO
WIPO (PCT)
Prior art keywords
data sequences
time slot
mobile station
radio
time slots
Prior art date
Application number
PCT/DE1999/002729
Other languages
German (de)
English (en)
Inventor
Egon Schulz
Jürgen Schindler
Original Assignee
Siemens Aktiengesellschaft
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 Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Priority to AU10297/00A priority Critical patent/AU1029700A/en
Priority to EP99953645A priority patent/EP1108342A1/fr
Publication of WO2000013446A1 publication Critical patent/WO2000013446A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • 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
    • H04B7/2618—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using hybrid code-time division multiple access [CDMA-TDMA]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/0003—Code application, i.e. aspects relating to how codes are applied to form multiplexed channels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/16—Code allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management

Definitions

  • the invention relates to a method for transmitting voice information in a radio communication system, in particular in m mobile radio systems with TDD subscriber separation.
  • radio communication systems messages (for example voice, image information or other data) are transmitted with the aid of electromagnetic waves via a radio interface.
  • the radio interface relates to a connection between a base station and mobile stations, it being possible to supply fixed radio stations instead of the mobile stations.
  • the electromagnetic waves are emitted at carrier frequencies that lie in the frequency band provided for the respective system.
  • UMTS Universal Mobile Telecommunication System
  • 3rd generation systems frequencies in the frequency band of approx. 2000 MHz are provided.
  • such a radio communication system optimized for high-rate data services is also to be improved for the transmission of voice information.
  • a Method with ⁇ en features of claim 1 specified which also enables a high system capacity for the transmission of voice information. Further developments of the invention can be found in the subclaims.
  • a radio interface is provided between a base station and mobile stations with broadband channels divided into m time slots for the transmission of the voice information. At least two data sequences are transmitted in one time slot, with m data sequences of a mobile station being assigned to a first group of time slots and both data sequences being assigned to different mobile stations in a second group of time slots.
  • the use of several data sequences per time slot results in a finer granularity of the
  • the method according to the invention finds particularly advantageous applications in radio communication systems in which a TDD subscriber separation method and / or additionally a subscriber separation are used by assigning different spreading codes to mobile stations of a time slot.
  • radio blocks with a midamble embedded between the two data sequences will be sent in the downward direction.
  • the data sequences before and after the midamble can therefore be one Be sen mobile station or two different mobile stations zugewie ⁇ .
  • m the uplink direction per time ⁇ be slit either sent a long radio block from a mobile station or two short temporally orthogonal radio blocks of zwe un- ter Kunststoff mobile stations, wherein a long radio block represents only two data sequences and each short radio block data sequences. Since no common midamble can be transmitted synchronously with two different transmitters, each of the short radio blocks consists of a midamble and data parts.
  • Data parts of a short radio block a data sequence.
  • the channel estimation and data detection is simplified by this transmission of the data sequences, which is adapted to the downward and upward direction.
  • a mobile station In order to support the voice transmission with a continuous flow of information, a mobile station is allocated on average between half and a resource unit, a resource unit being formed by the bandwidth, a spreading code and a time slot per frame.
  • adjustable fractions of a resource unit can also be assigned. The fraction is set by the rotation of no, one or two data sequences per mobile station and the rotation cycle.
  • a particularly significant fraction is 2/3 of a resource unit, i.e. e.g. three mobile stations share two resource units. Accordingly, a time slot with both data sequences is assigned to a mobile station in every third frame and a time slot with only one data sequence is assigned to m two out of three frames.
  • FIG 1 shows a block diagram of a mobile radio system
  • 2 shows a schematic representation of the frame structure of the TDD transmission method
  • FIG 3 is a schematic representation of a long radio blocks ⁇
  • FIG 4 is a schematic representation of a short radio blocks
  • FIG 5 is a schematic representation of the transfer m
  • FIG 6 is a schematic representation of the transmission in the downward direction.
  • the mobile radio system shown in FIG. 1 as an example of a radio communication system consists of a multiplicity of mobile switching centers MSC which are networked with one another or which provide access to a fixed network PSTN. Furthermore, these mobile switching centers MSC are each connected to at least one device RNM for allocating radio resources. Each of these RNM devices in turn enables a connection to at least one base station BS. Such a base station BS can connect to other radio stations, e.g. Set up mobile stations MS or other mobile and stationary devices. At least one radio cell is formed by each base station BS.
  • An operation and maintenance center OMC implements control and maintenance functions for the mobile radio system or for parts of it.
  • the functionality of this structure can be transferred to other radio communication systems in which the invention can be used, in particular for subscriber access networks with a wireless subscriber line.
  • the frame structure of the radio transmission is shown in FIG 2.
  • a TDMA component time division multiple access
  • several time slots ts of the same duration for example 16 time slots tsO to tsl5.
  • a frequency band extends over a frequency range B.
  • Some of the time slots ts0 to ts8 are used in the downward direction DL and some of the time slots ts9 to tsl5 are used in the upward direction UL.
  • the frequency band for the upward direction UL corresponds to the frequency band for the downward direction DL. The same is repeated for other carrier frequencies.
  • a resource unit i.e. a physical channel Kl is formed by a frequency band B, a time slot ts and a spreading code c.
  • Symbols of the data d have the effect that Q chips of the duration T ch ⁇ P are transmitted within the symbol duration Tsy m .
  • the Q chips form the connection-specific spreading code c.
  • the successive time slots ts are structured according to a frame structure. So 16 time slots ts are combined into a frame for.
  • a long radio block MB which fills an entire time slot ts, consists of a central amble MA, which is surrounded by two data sequences D1 and Dl. Furthermore, a protection time SP follows, which serves to compensate for differences in runtime.
  • a short radio block HB is also constructed, but it only takes up about half the time of a time slot ts.
  • a resource unit is a physical channel K1 with a data rate of 27.6 Kbit / s.
  • the number of participants with this lowest data rate would also be limited by the number of physical channels.
  • a lower data rate can be set for voice transmission by assigning less than one resource unit to a mobile station MS on average over time.
  • the continuous data stream is simulated in contrast to a packet transmission, although the frame rate of a mobile station MS is not always the same data rate, but a varying data rate is available.
  • radio blocks from different mobile stations MSI, MS2, MS3 are sent to the base station BS.
  • the time slots tsO, tsl are used for three voice connections of the mobile stations MSI, MS2, MS3.
  • a long radio block is transmitted in rotation from one of the three mobile stations MSI, MS2, MS3, which means that each mobile station MSI, MS2, MS3 is assigned 1/3 of a resource unit.
  • two short radio blocks HB are sent by the two mobile stations MSI, MS2, MS3 not transmitting in the first time slot tsO.
  • the mobile stations MSI, MS2, MS3 thus have a further 1/3 resource unit available through the short radio blocks HB distributed over two frames frl.
  • the long and short radio blocks MB, HB are spread according to FIG. 5 with different spreading codes cl, c2. However, due to the time separation according to time slots tsO, tsl, this is not an inevitable condition.
  • a part of the speech information is sent in each frame for, which means that the intermediate storage effort can be kept low.
  • Both types of radio blocks should not be used at the same time in a time slot ts in order to keep the evaluation effort low on the receiving side, in particular in the case of channel estimation.
  • the first mobile station MSI uses a long radio block MB in the first frame frl and its two data sequences D1, D2 and m use the two following frames fr2, fr3 each a short radio block HB and thus the two data parts Dl 'and Dl' ' first sequence D1.
  • This mobile station MSI thus has a data rate of 18.4 Kbit / s available.
  • the base station BS transmits to several mobile stations MSI, MS2, MS3. Only long radio blocks HB are used, so it is possible but not necessary that only one time slot tsO is used in the sense of rotation with two different spreading codes cl, c2.
  • the base station transmits for the three mobile stations MSI, MS2, MS3 rotating two sequen ⁇ zen Dl and D2, thereby averaged over time, in turn, each of the three mobile stations MSI, MS2, MS3, a 1/3 resource unit communicates with the first spreading code Cl for disposal.
  • a second long radio block MB is sent spread with the second spreading code c2, the second mobile station MS2 evaluating the first data sequence D1 and the third mobile station MS3 the second data sequence D2 in the first frame frl.
  • the exemplary embodiment showed how three mobile stations MSI, MS2, MS3 share two resource units.
  • other fractions can also be set by means of a corresponding rotation sequence.
  • the rotation can be carried out without the use of different spreading codes cl, c2 by sending m different time slots tsO, tsl, possibly with the same spreading code cl.

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

Abstract

Interface radio entre une station de base et des stations mobiles, dotée de canaux à large bande subdivisés en intervalles de temps, pour la transmission d'informations vocales. Deux séquences de données au moins sont envoyées dans un intervalle de temps, les deux séquences de données étant attribuées, dans un premier groupe d'intervalles de temps, à une station mobile, et dans un deuxième groupe d'intervalles de temps, à des stations mobiles différentes. L'utilisation de plusieurs séquences de données par intervalle de temps entraîne une granularité plus fine des unités de ressources, et la forme mixte d'une attribution de une ou deux séquences de données par intervalle de temps à une station mobile entraîne une plus grande souplesse concernant le débit de données pouvant être attribué à une station mobile. Par conséquent, un grand nombre de liaisons vocales étalées selon un procédé de séparation d'abonnés CDMA peut être supporté dans des systèmes radiomobiles à duplex à répartition dans le temps (TDD) à canaux à large bande.
PCT/DE1999/002729 1998-09-01 1999-09-01 Procede de transmission d'informations vocales dans un systeme de communication radio WO2000013446A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU10297/00A AU1029700A (en) 1998-09-01 1999-09-01 Method for transmitting voice information in a radiocommunication system
EP99953645A EP1108342A1 (fr) 1998-09-01 1999-09-01 Procede de transmission d'informations vocales dans un systeme de communication radio

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19839805.0 1998-09-01
DE19839805 1998-09-01

Publications (1)

Publication Number Publication Date
WO2000013446A1 true WO2000013446A1 (fr) 2000-03-09

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1999/002729 WO2000013446A1 (fr) 1998-09-01 1999-09-01 Procede de transmission d'informations vocales dans un systeme de communication radio

Country Status (4)

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EP (1) EP1108342A1 (fr)
CN (1) CN1316170A (fr)
AU (1) AU1029700A (fr)
WO (1) WO2000013446A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001086837A1 (fr) * 2000-05-09 2001-11-15 Qualcomm Incorporated Procede et appareil permettant la mise en oeuvre de services vocaux et de services de donnees dans un systeme de communication sans fil a haut debit
GB2389007A (en) * 2001-09-20 2003-11-26 E2V Tech Uk Ltd Data transmission protocol
US7760698B2 (en) 2000-10-24 2010-07-20 Alcatel Lucent Shared channel structure, ARQ systems and methods

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100433856C (zh) * 2005-07-22 2008-11-12 华为技术有限公司 一种集群组呼接入方法
CN100426800C (zh) * 2006-07-20 2008-10-15 华为技术有限公司 一种带宽资源分配的方法
CN100455131C (zh) * 2006-08-18 2009-01-21 华为技术有限公司 一种带宽资源分配方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0538546A2 (fr) * 1986-03-25 1993-04-28 Motorola Inc. Méthode et appareil de commande d'un dispositif de communication TDM
US5327576A (en) * 1990-08-23 1994-07-05 Telefonakitebolaget L M Ericsson Handoff of a mobile station between half rate and full rate channels
GB2318705A (en) * 1996-10-22 1998-04-29 Motorola Ltd Multipath signal equalizer with adaptive aerial array
EP0841763A1 (fr) * 1996-10-25 1998-05-13 Nokia Mobile Phones Ltd. Procédé de contrÔle de ressources radio

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0538546A2 (fr) * 1986-03-25 1993-04-28 Motorola Inc. Méthode et appareil de commande d'un dispositif de communication TDM
US5327576A (en) * 1990-08-23 1994-07-05 Telefonakitebolaget L M Ericsson Handoff of a mobile station between half rate and full rate channels
GB2318705A (en) * 1996-10-22 1998-04-29 Motorola Ltd Multipath signal equalizer with adaptive aerial array
EP0841763A1 (fr) * 1996-10-25 1998-05-13 Nokia Mobile Phones Ltd. Procédé de contrÔle de ressources radio

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001086837A1 (fr) * 2000-05-09 2001-11-15 Qualcomm Incorporated Procede et appareil permettant la mise en oeuvre de services vocaux et de services de donnees dans un systeme de communication sans fil a haut debit
US7760698B2 (en) 2000-10-24 2010-07-20 Alcatel Lucent Shared channel structure, ARQ systems and methods
US8248912B2 (en) 2000-10-24 2012-08-21 Alcatel Lucent Shared channel structure, ARQ systems and methods
GB2389007A (en) * 2001-09-20 2003-11-26 E2V Tech Uk Ltd Data transmission protocol
GB2389007B (en) * 2001-09-20 2005-06-29 E2V Tech Uk Ltd Data exchange protocol

Also Published As

Publication number Publication date
EP1108342A1 (fr) 2001-06-20
AU1029700A (en) 2000-03-21
CN1316170A (zh) 2001-10-03

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