WO2000010347A1 - Transmission de donnees dans un systeme de telecommunication - Google Patents

Transmission de donnees dans un systeme de telecommunication Download PDF

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Publication number
WO2000010347A1
WO2000010347A1 PCT/FI1999/000660 FI9900660W WO0010347A1 WO 2000010347 A1 WO2000010347 A1 WO 2000010347A1 FI 9900660 W FI9900660 W FI 9900660W WO 0010347 A1 WO0010347 A1 WO 0010347A1
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WO
WIPO (PCT)
Prior art keywords
radio
frames
frame
information
transmission
Prior art date
Application number
PCT/FI1999/000660
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English (en)
Inventor
Juha Räsänen
Original Assignee
Nokia Networks 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
Application filed by Nokia Networks Oy filed Critical Nokia Networks Oy
Priority to AU52917/99A priority Critical patent/AU5291799A/en
Priority to US09/762,228 priority patent/US6985470B1/en
Publication of WO2000010347A1 publication Critical patent/WO2000010347A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/18—Service support devices; Network management devices
    • H04W88/181—Transcoding devices; Rate adaptation devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/02—Inter-networking arrangements

Definitions

  • the invention relates to data transmission in a telecommunication system.
  • TDMA time division multiple access
  • CDMA code division multiple access
  • FDMA frequency division multiple access
  • communication on the radio path is time divided and occurs in successive repetitive TDMA frames, each of which comprises a plurality of timeslots.
  • a short information packet is sent as a finite radio frequency burst composed of a group of modulated bits.
  • Timeslots are mainly used to transmit control channels and traffic channels. Speech and data are transmitted on traffic channels. Control channels are used for signalling between a base sta- tion and mobile stations.
  • GSM Global System for Mobile Communications
  • a traffic channel is defined by a unique spreading code assigned to a mobile station, whereas in the FDMA system, a traffic channel is defined by a radio channel.
  • the maximum data transfer rate on a traffic channel is relatively low, as it is limited by the available bandwidth and the channel and error codings used in the transmission.
  • GSM Global System for Mobile Communications
  • the user data rate in a traffic channel using one timeslot was restricted to 9.6 kbit/s according to the original specifications, the radio interface rate being 12 kbit/s. This was found to be insufficient for many new teleservices, such as telefax, video image transfer, etc. This is why high-speed data transmission services based on what is known as a multiple channel technique are being introduced into new mobile communication systems.
  • a mobile station is offered a higher bit rate and a wider bandwidth in the form of a plurality of parallel basic traffic channels (e.g. several timeslots).
  • a high-speed data service HSCSD High Speed Circuit Switch Data
  • ETSI European Telecommunications Standards Insti- tute
  • GSM 01.34, GSM 02.34 and GSM 03.34 a high-speed data signal is divided into separate data streams which are then transmitted via N sub-channels (N traffic chan- nel/timeslots) at the radio interface, and similarly, in N sub-channels between a base station and a mobile switching centre (transcoder). Once the data streams are divided, they are carried in the sub-channels as if they were not interdependent, until they are again combined at the receiving end.
  • N sub-channels N traffic chan- nel/timeslots
  • the GSM-HSCSD is able to support a radio interface rate of 96 kbit/s (8 x 12 kbit/s) and user rates of 76.8 kbit s (8 x 9.6 kbit/s).
  • Digital mobile communication systems employ radio system timing to synchronize data transmission over the air interface.
  • a basic timing unit is 20 milliseconds (ms).
  • said 20-ms unit corresponds to four V.110 frames (in cases involving TCH/F9.6 or TCH/F4.8 or TCH/F2.4 channel coding) or one E-TRAU frame (in cases involving TCH/F14.4 channel coding).
  • said 20-ms unit corresponds to one radio link protocol (RLP) frame (in cases involving TCH/F9.6 or TCH/F4.8 or TCH/F2.4 channel coding) or one half of an RLP frame (in cases involving TCH/F14.4 channel coding). In the latter case, the halves of the RLP frame are separated by an indication bit.
  • RLP radio link protocol
  • TCH/F14.4 channel coding was introduced into the GSM system later, when higher data transfer rates were needed.
  • TCH/F14.4 channel coding requires a new RLP protocol version since said 20-ms basic timing unit included more bits than previously and was therefore not compatible with the RLP frame length or its multiple.
  • TCH/F14.4 also produced a rather rough remapping procedure, enabling swapping between TCH/F14.4 and TCH/F9.6 channel coding during a data call.
  • a reason for said swapping function is e.g. connection optimization after a change in radio link quality, or handover between two cells, one of which supports TCH/F14.4 channel coding and the other not.
  • the new TCH/F14.4 channel coding provided an extremely well optimized rate adaptation: a 14.5 kbit/s radio interface rate, of which 14.4 kbit/s is user data, adapted to the new number of bits in the 20-ms basic timing.
  • each channel coding has a different number of bits in one basic 20-ms timing unit.
  • Some channel codings may produce a number of bits which is compatible with current rate adaptation frames or multiples of RLP frames, other channel codings may produce a number of bits requiring new RLP versions or new rate adaptation methods, whereas some channel codings may produce a number of bits which supports the use of current rate adaptation methods only very inefficiently, that is, with significant overhead.
  • the ETSI EDGE project (Enhanced Data Rates for GSM Evolution) is developing a new modulation method offering a higher data transfer rate per timeslot than the present GMSK modulation, but maintaining the 200-khz channel spacing and the TDMA frame structure. This allows the present HSCSD data services to be supported by a smaller number of timeslots.
  • the new modulation allows the production of new data services having as high as a 64 kbit/s data transfer rate per timeslot or over 64 kbit/s (n * 64 kbit/s) in a multiple timeslot constellation.
  • the radio interface rate is either 28.8 kbit/s or 38.4 kbit/s.
  • New channel codings causing the above problems are also produced with the new modulation method.
  • the object of the invention is a method and system eliminating the above problems and achieving the objects.
  • an information unit is asynchronously transmitted over a transmission link, such as a radio interface, in the basic timing units of the transmission link (such as a radio interface) called radio frames herein, in the case of a radio interface.
  • the information units are placed in two or more successive radio frames in such a way that each radio frame contains at least one whole information unit and part of an information unit which is split in two successive radio frames. This way the radio frames may be considered to contain asynchronous information units.
  • One or more bits in a radio frame are reserved for phase indication, on the basis of which a receiver synchronizes to the asynchronous information units within the radio frames.
  • the phase indica- tion is modulo N determining the sequence of N successive radio frames and indicating for each radio frame which of the N possible radio frames in the frame sequence said frame is.
  • the transmitting unit packs the information units into radio frames and provides the radio frames with the above phase indication. As many whole information units as possible (at least one) are packed in the last radio frame of the frame sequence, and the end of the last radio frame is filled with filler bits, if required. This is usually required since the number of bits required by the information units packed in the frame sequence and by said phase indication is smaller than the total number of information bits in the frame sequence. This is typically the case in the primary application areas of the invention, i.e. when the length of the information field of a radio frame is not the length or a multiple of the information unit to be transmitted.
  • Filler bits can be located in the frame sequence in other locations than at the end of the last radio frame.
  • the receiving unit indicates phasing between the radio frames and the asynchronous information units in the radio frames by synchronizing with said phase indication. In other words, the receiving unit detects from the phase indication where the start of the frame sequence and the start of each whole information unit in the radio frame is, and separates the information units from the radio frames for further processing. The receiving unit rejects any filler bits.
  • An information unit may be any protocol unit or frame or information element which is to be transmitted over the radio interface.
  • the information unit may be a transmission frame or a part thereof (contents) used in data transmission between a network element, such as a base station, and a network adapter in a radio access network, for example, such as A-TRAU or E-TRAU frames in the GSM system.
  • the information unit may also be a protocol data unit of an upper protocol.
  • An example of this is a protocol data unit, such as a radio link protocol (RLP) frame in the GSM system, of a link protocol established between a mobile station and a network adapter.
  • RLP radio link protocol
  • the invention allows the same fixed- length information unit to be arranged in a radio frame having any number of bits, i.e. the same information units may be transmitted through the radio interface of the radio system with different channel codings.
  • a radio system may have a dedicated modulo N sequence for different data transfer rates and channel codings.
  • the invention allows the radio system to use the same information unit in different channel codings.
  • the present invention may be applied to the transmission of current RLP frames and transparent rate adaptation frames through new EDGE channel codings, avoiding the need to determine new RLP versions, rate adaptation methods and remapping procedures.
  • the invention optimizes the efficiency of channel coding, since it causes very slight overhead in the system.
  • phase indication reserves one bit or only some bits in a radio frame.
  • Phase indication may be for example a pseudo-noise (PN) code spread over N radio frames. This is extremely efficient, since only one bit is needed in each radio frame.
  • PN pseudo-noise
  • the maximum modulo sequence of the radio frames is 31 frames and the receiver has to receive five radio frames in order to synchronize to the sequence, i.e. to lock to the right phase, in order for the receiver to know which of the 31 frames is involved and, accordingly, where the starts of the information units are in each radio frame.
  • phase indication may be for example a sequence number (0, 1 , 2, 3... ). In this case the receiver only has to receive one radio frame in order to synchronize to the frame sequence.
  • phase indication may be coded to protect it against transmission errors which may occur in transmission over the radio path.
  • Figures 1A and 1 B show a protocol structure for transparent and non-transparent traffic channels TCH/F4.8 and TCH/F9.6 in the GSM system
  • Figure 2 shows Abis interface protocols for a traffic channel
  • Figure 3 illustrates the channel configuration required by a 38.4 kbit/s EDGE traffic channel in the GSM
  • FIG. 4 shows a Modulo N radio frame sequence according to the invention
  • Figure 5A illustrates downlink E-TRAU frames
  • Figures 5B and 6A illustrate the radio frame sequence of the invention for a 38.4 kbit/s EDGE traffic channel
  • Figure 6B illustrates an information unit sequence which a mobile station separates from radio frames received.
  • the present invention may be applied in all digital telecommunication systems, and particularly in wireless telecommunication systems, such as cellular systems, WLL (Wireless Local Loop) and RLL (Radio Local Loop) type of networks, satellite-based mobile communication systems, etc., for the addition of a new high-speed traffic channel to the radio interface without any need to define new speed adaptations for transmission links.
  • the term mobile communication system (or network) refers generally to all wireless telecommunication systems.
  • TDMA time division multiple access
  • CDMA code division multiple access
  • FDMA frequency division multiple access
  • the physical concept of a traffic channel varies in different multiple access systems, being primarily defined by means of a time slot in TDMA systems, by a spreading code in CDMA systems, by a radio channel in FDMA systems, a combination thereof, etc.
  • the basic idea of the present invention is independent of the type of traffic channel and the multiple access methods used.
  • the primary application area of the invention is the addition of an EDGE radio interface to the GSM system or a corresponding change in other GSM-based systems, such as the DCS1800 (Digital Communication System), the US digital cellular system PSC (Personal Communication System), and WLL systems based on the above systems.
  • the invention will be described by using the GSM mobile communication system as an example.
  • the structure and operation of the GSM system are well known to persons skilled in the art and are defined in the ETSI (European Telecommunications Standards Insti- tute) GSM specifications.
  • ETSI European Telecommunications Standards Insti- tute
  • the basic structure of the GSM system comprises two parts: a base station system BSS and a network sub-system (NSS).
  • the BSS and mobile stations MS communicate via radio links.
  • a base station BTS serves each cell in the base station system BSS.
  • a number of base stations are connected to a base station controller BSC, which controls the radio frequencies and channels the BTS uses.
  • the BSCs are connected to a mobile services switching centre MSC.
  • at least two data bases exist, a home location register HLR and a visitor location register VLR.
  • a mobile communication system typically comprises adapter functions for adapting the internal data link of the mobile communication network to the protocols used by the terminals and other telecommunication networks.
  • Typical adapter functions include a terminal adaptation function (TAF) at the interface between a mobile station and a data terminal connected thereto, and a network adapter IWF (InterWorking Function) at the interface between the mobile communication network and a second telecommunication network, usually in connection with a mobile switching centre.
  • a mobile switching centre usually has several types of adapter equipment pools for supporting different data services and protocols, e.g. a modem pool comprising modems and telefax adapters for modem and telefax services, a UDI/RDI speed adapter pool, etc.
  • a data link is established between the network terminal TAF of a mobile station MS and a network adapter IWF in the mobile communication system.
  • the TAF adapts the data terminal DTE connected to the mobile station MS to said GSM data link which is set up over a physical connection using one or more traffic channels.
  • the IWF connects the GSM data link to another network, such as the ISDN or a second GSM network, or the public telephone network PSTN.
  • Network services are usually divided into groups according to a property, e.g. asynchronous network services and synchronous network services. Each group comprises a number of network services, such as transparent service (T) and non-transparent service (NT).
  • T transparent service
  • NT non-transparent service
  • T transparent service
  • NT non-transparent service
  • the data to be transmitted is not structured and transmission errors are corrected only by channel coding.
  • non-transparent service the data to be transmitted is structured into protocol data units (PDU) and transmission errors are corrected by using (in addition to channel coding) automatic retransmission protocols.
  • PDU protocol data units
  • Figure 1A shows an example of protocols and functions needed in the IWF (either in the MSC or a WLL-specific network element) for transparent network services.
  • the transparent circuit-switched connection between the terminal adapter TAF and the network adapter IWF in a GSM traffic channel comprises a plurality of protocol layers which are common to all these services.
  • RA rate adaptation functions
  • RA1 between a terminal adapter TAF and a CCU unit (Channel Codec Unit) in the base station system BSS
  • RA1 between a CCU unit and a network adapter IWF
  • RAA between a CCU unit and a transcoder unit TRAU which is separate from the base station
  • RA2 between a transcoder unit TRAU and a network adapter IWF.
  • the rate adaptation functions RA are defined in GSM recommendations 04.21 and 08.20. Traffic between a CCU unit and a transcoder unit TRAU is defined in GSM recommendation 08.60.
  • RA1 ' rate adapted information is also channel coded in a manner defined by GSM recommendation 5.03; blocks FEC illustrate this in a mobile station MS and a CCU unit.
  • the IWF and the TAF also comprise upper layer protocols, which are service-specific.
  • the IWF requires an asynchronous/synchronous conversion of RAO and a modem or a rate adapter towards the fixed network.
  • a transparent signal propagates through a traffic channel between the terminal interface and the PSTN/ISDN.
  • a transparent synchronous configuration is otherwise similar, but does not have the rate adaptation RAO.
  • the IWF and MS comprise, instead of RAO, L2R (Layer 2 Relay) and RLP (Radio Link Protocol) protocols.
  • L2R Layer 2 Relay
  • RLP Radio Link Protocol
  • the L2R functionality for non-transparent character-oriented protocols is defined in GSM recommendation 07.02, for example.
  • the RLP protocol is defined in GSM recommendation 04.22.
  • the RLP is a frame-structured, balanced (HDLC type) data transmission protocol in which error correction is based on retransmission of distorted frames at the request of the receiving party.
  • the interface between the IWF and an audio- modem MODEM conforms to CCITT V.24, and is denoted by symbol L2 in Figure 1 B.
  • FIGS 1A and 1 B relate to a network configuration in which a transcoder and some rate adaptations are located outside the base station BTS in what is known as a remote transcoder TRAU.
  • the transcoder is considered to be a functional part of the BSC.
  • Physically the TRAU may be located either in the BSC or the MSC.
  • the interface between the transcoder unit TRAU and the base station BTS is called the Abis interface.
  • the Abis interface comprises 16 kbit/s traffic channels, four of which can be transmitted in one standard 64 kbit/s channel.
  • Information is transmitted between a channel codec unit CCU and a transcoder unit TRAU in fixed-length frames, called TRAU frames.
  • Both speech/data and control signals associated with the transcoder TRAU are transmitted in these frames.
  • the rate adaptation function RA1/RAA is required in addition to the other rate adaptations.
  • RA17RAA' converts the radio frames (blocks) into E-TRAU format and vice versa.
  • the RAA' function converts an E-TRAU frame into an A-TRAU frame and vice versa.
  • the rate adaptation defined for TCH/F14.4 channel coding is also probably the best alternative for traffic channels at the EDGE radio interface, the primary embodiment of the invention will be described implemented thereby. However, it should be noted that the invention may also be implemented by other rate adaptations, such as RA1/RAA.
  • a high-speed data signal is divided into separate data streams which are then transmitted through an N sub-channel (N traffic channel/timeslots) at the radio interface and through an N transmission channel (16 kbit/s) between BTS/IWF.
  • N traffic channel/timeslots N traffic channel/timeslots
  • N transmission channel 16 kbit/s
  • the data streams are divided, they are carried in the sub-channels as if they were not interdependent, until they are again combined in the IWF or the MS.
  • these N sub-traffic channels belong to the same HSCSD link, i.e. they form one HSCSD traffic channel.
  • a data stream is divided and combined in a modified RAO or RLP, which is hence common to all sub-channels.
  • each sub-channel has separately the same protocol stack RA1 '-FEC- FEC-RA1 '-RAA-RAA-RA2-RA2-RA1 or RA1 '-FEC-FEC-RA1 '-RAA'-RAN-RA2- RA2-RA1 , which is shown in Figures 1A and 1 B for one traffic channel be- tween MS/TAF and MSC/IWF.
  • traffic channels are numbered to maintain the order of the data.
  • multiframing is used to increase the tolerance against transmission delay errors between traffic channels.
  • Channel and frame numbering is carried as inband signalling.
  • the radio interface rate would be 48 kbit/s because of the V.110 overhead. This would signify weak channel coding since the gross rate of the selected EDGE modulation method is 69.2 kbit/s.
  • the radio interface rate should be as close as possible to the 38.4 kbit/s user rate to result in better channel coding.
  • a third way would be to define a suitable new rate adaptation and a new RLP version by new remapping operations to an optimized channel coding (at for example a 39 kbit/s radio interface rate). This would require much specification and implementation work. Furthermore, this is against EDGE standardization which aims at using current protocols with a minimal number of changes. These problems can be avoided by the present invention whose basic principle is illustrated in Figure 4.
  • radio frames are provided with phase indication P ⁇ ... P n defining a sequence of N radio frames.
  • the phase indication P ⁇ ... P n indicates which of the N possible frames in the frame sequence the frame concerned is.
  • a transmitting unit packs the information units l ⁇ ... l n in radio frames and provides the radio frames with the above phase indication P.
  • the length of an information unit is shorter than the length of the information field in a radio frame, whereby the number N of information units is also higher than the number of radio frames in N sequences.
  • each radio frame contains at least one whole information unit I (such as information units 11 , 12, 14, 16 and l N ) and part of an information unit split in two successive radio frames (such as l 51 and l 52 , split from one whole information unit l 5 in two radio frames).
  • whole information units such as information units 11 , 12, 14, 16 and l N
  • part of an information unit split in two successive radio frames such as l 51 and l 52 , split from one whole information unit l 5 in two radio frames.
  • the modulo N radio frame sequence forms a kind of a multiframe in which phase indication Pi acts as synchronization information.
  • a 38.4 kbit/s user rate can be carried in A-TRAU and E-TRAU frames defined for TCH/F14.4 channel coding between the network adapter MSC/IWF and the base station BTS using three Abis interface 16 kbit/s traffic channels, each of which has 14.4 kbit/s rate adaptation.
  • every ninth A-TRAU and E-TRAU frame is a dummy frame.
  • the PTS and IWF add the dummy frames in transmission and reject them in reception.
  • Figure 5A illustrates a group of nine E-TRAU frames, eight of which have information contents ... I 8 and one of which is a dummy frame DUMMY.
  • An E-TRAU frame contains 290 information bits (14500 bit/s:50).
  • the header field H illustrates header, control, synchronization and other information associated with an E- TRAU frame.
  • Figure 5B illustrates downlink radio frames which the PTS sends over the radio interface to the mobile station MS.
  • the header H generally rep- resents all header, control, synchronization and other information in a radio frame.
  • a radio frame must have enough bits for transmitting information payload.
  • At least one bit of each 20-ms radio frame is required for the phase indication P1 , P2 and P3 of the invention. This indi- cates a need for an at least 50-bit/s additional capacity.
  • 38.800 kbit s is chosen as the radio interface rate.
  • a radio interface rate of 38.800 kbit/s corresponds to 776 infor- mation bits for each 20-ms radio frame (38800 bit/s:50).
  • the relation of the number of information bits in a radio frame to the number of information bits in an E-TRAU frame is 776/290. This is slightly more than 8/3, i.e. three radio interface frames may carry the information of 8 E-TRAU frames and some extra bits.
  • a sequence of three radio frames has eight extra bits for other purposes (2328-2320 bits).
  • a frame numbering in which two bits in each radio frame are used for frame indication is selected as phase indication.
  • Two bit locations in each sequence of three radio frames are extra and pading information has to be carried therein.
  • these filler bits e.g. 11 ) are placed at the end of the last frame.
  • the first radio frame contains the contents and l 2 of two whole E- TRAU frames and slightly more than two thirds l 3 ⁇ of E-TRAU frame l 3 .
  • the rest l 32 of the E-TRAU frame l 3 is placed in a second radio frame.
  • the second radio frame contains the contents l 4 and l 5 of two whole E-TRAU frames and slightly more than a third of E-TRAU frame l 6 .
  • the remaining two thirds l 62 of E-TRAU frame l 6 are placed in a third radio frame.
  • the third radio frame contains the contents l 7 and l 8 of two whole E-TRAU frames, and two filler bits. After this, a new modulo 3 radio frame sequence begins.
  • FIGS 6A and 6B illustrate the downlink operation of a mobile sta- tion MS.
  • the MS receives downlink radio frames (Figure 6A), which are identical to those in Figure 5B.
  • the MS inspects the phase indication field P1 in the radio frame to find out which radio frame in the frame sequence is involved and thereby where the information units start in the radio frame.
  • the MS also knows that the 290 bits following the phase indication field P1 contain the first whole information unit , the following 290 bits contain the second whole information unit l 2 and the last 194 bits contain the third information unit.
  • the 580 bits following part l 32 of the information unit contain a whole information unit l and the following 290 bits contain a whole information unit l 5 .
  • the last hundred bits of the second frame contain part l 6 ⁇ of an information unit.
  • the MS carries out the combination and produces a whole information unit l 6 .
  • the following 580 bits contain the seventh and eight whole information units l 7 and l 8 .
  • the MS rejects the last two bits of the radio frame, which are filler bits. This way the MS has restored a sequence of eight information units to l 8 for further processing.
  • the next radio frame received by the mobile station MS is the first frame in the next modulo 3 frame sequence, whereby the above procedure is repeated.
  • the uplink procedure is reverse but otherwise identical to what was described above (in Figures 5A, 5B, 6A and 6B the arrows are changed in opposite directions).
  • the MS packs eight units of the information unit stream shown in Figure 6B in the uplink ra- dio frames shown in Figure 6A and provides them with the phase indication of the invention.
  • the base station BTS receives said uplink radio frames which are as shown in Figures 5B and 6A, and separates whole information units from them in the same way as was described above for the mobile station MS in the downlink direction.
  • the BTS packs the separated information units into contents of E-TRAU frames, whereby uplink E-TRAU frames according to Figure 5A are obtained and sent to the network adapter IWF.
  • the information unit is the contents of an E-TRAU frame
  • the information unit may be composed of any information which is to be transmitted.
  • this unit in non-transparent transmission this unit may be a frame in the radio link protocol (RLP).
  • RLP radio link protocol
  • an information unit in transparent data transmission an information unit may be a V.110 frame or a group of several V.110 frames.

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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 la transmission de données dans un système de télécommunication. Une unité d'information est transmise de manière asynchrone via une liaison de transmission, telle qu'une interface radio que l'on appelle ici trames radio, dans les synchroniseurs de base de la liaison de transmission lorsqu'il s'agit d'une interface radio. Les unités d'information (I1...I8) sont placées dans deux ou plusieurs trames radio successives de manière que chaque trame radio comprenne au moins une unité d'information complète et une partie d'une unité d'information (I3) divisée (I31...I32) en deux trames radio successives. Ainsi, les trames radio contiennent des unités d'information asynchrones. Un ou plusieurs bits dans une trame radio est(sont) consacré(s) à l'indication de phase (P1, P2) selon laquelle un récepteur est synchronisé sur les unités d'information asynchrones au sein des trames radio. L'indication de phase est modulo N qui définit une séquence de N trames radio successives et indique pour chaque trame radio laquelle des N trames radio éventuelles dans la séquence de trames est la trame en question. L'unité de réception indique la mise en phase entre les trames radio et les unités d'information asynchrones dans les trames radio par l'intermédiaire d'une synchronisation sur l'indication de phase.
PCT/FI1999/000660 1998-08-10 1999-08-09 Transmission de donnees dans un systeme de telecommunication WO2000010347A1 (fr)

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Application Number Priority Date Filing Date Title
AU52917/99A AU5291799A (en) 1998-08-10 1999-08-09 Data transmission in a telecommunication system
US09/762,228 US6985470B1 (en) 1998-08-10 1999-08-09 Data transmission in a telecommunication system

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FI981723A FI105752B (fi) 1998-08-10 1998-08-10 Datasiirto tietoliikennejärjestelmässä
FI981723 1998-08-10

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002028131A1 (fr) * 2000-09-27 2002-04-04 Airspan Networks Inc. Transfert de differents type de donnees dans un systeme de telecommunications
EP2237464A1 (fr) * 2000-09-27 2010-10-06 Wi-LAN Inc. Transfer de différentes types de données dans un système de télécommunication
CN104796225A (zh) * 2015-03-23 2015-07-22 中国铁路总公司 基于IP化GSM-R网络的4.8kb/s数据业务传输方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996027960A1 (fr) * 1995-03-06 1996-09-12 Nokia Telecommunications Oy Transmission de l'information a grande vitesse dans des reseaux de communication mobiles
US5570362A (en) * 1994-03-16 1996-10-29 Fujitsu Limited System for transferring variable length cells under ATM
JPH0946355A (ja) * 1995-07-31 1997-02-14 Nec Corp フレームデータをセル化する方法及び装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5570362A (en) * 1994-03-16 1996-10-29 Fujitsu Limited System for transferring variable length cells under ATM
WO1996027960A1 (fr) * 1995-03-06 1996-09-12 Nokia Telecommunications Oy Transmission de l'information a grande vitesse dans des reseaux de communication mobiles
JPH0946355A (ja) * 1995-07-31 1997-02-14 Nec Corp フレームデータをセル化する方法及び装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002028131A1 (fr) * 2000-09-27 2002-04-04 Airspan Networks Inc. Transfert de differents type de donnees dans un systeme de telecommunications
US6816726B2 (en) 2000-09-27 2004-11-09 Airspan Networks, Inc. Transfer of different data types in a telecommunications system
EP2237464A1 (fr) * 2000-09-27 2010-10-06 Wi-LAN Inc. Transfer de différentes types de données dans un système de télécommunication
CN104796225A (zh) * 2015-03-23 2015-07-22 中国铁路总公司 基于IP化GSM-R网络的4.8kb/s数据业务传输方法

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FI981723A0 (fi) 1998-08-10
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FI981723A (fi) 2000-02-11

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