EP1486086A1 - Verfahren und vorrichtung zur auflösung einer fehlanpassung in umts-kommunikationsnetzen - Google Patents
Verfahren und vorrichtung zur auflösung einer fehlanpassung in umts-kommunikationsnetzenInfo
- Publication number
- EP1486086A1 EP1486086A1 EP02727240A EP02727240A EP1486086A1 EP 1486086 A1 EP1486086 A1 EP 1486086A1 EP 02727240 A EP02727240 A EP 02727240A EP 02727240 A EP02727240 A EP 02727240A EP 1486086 A1 EP1486086 A1 EP 1486086A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- speech
- assignment
- codec mode
- character
- codecs
- 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- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000004891 communication Methods 0.000 title claims description 10
- 230000006835 compression Effects 0.000 claims description 12
- 238000007906 compression Methods 0.000 claims description 12
- 230000005540 biological transmission Effects 0.000 claims description 7
- 230000006978 adaptation Effects 0.000 claims description 6
- 230000003044 adaptive effect Effects 0.000 claims description 5
- 239000011159 matrix material Substances 0.000 claims description 5
- 230000003213 activating effect Effects 0.000 claims description 2
- 238000013507 mapping Methods 0.000 claims 1
- 238000010168 coupling process Methods 0.000 abstract description 2
- 238000005859 coupling reaction Methods 0.000 abstract description 2
- 230000006837 decompression Effects 0.000 description 5
- 238000007796 conventional method Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 230000009849 deactivation Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
Classifications
-
- 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
Definitions
- the invention relates to a method and a device for resolving a mismatch between speech data transmitted in a speech codec mode with a first assignment character for the speech hcodec mode in a first network section of a communication network based on speech compression, such as according to the UMTS standard and speech data transmitted in a speech codec mode with a second assignment character for the speech codec mode in a second network section according to the preambles of claims 1 and 8.
- the Universal Mobile Telecommunication System is one of several mobile radio systems that provide a variety of services to the subscriber of a mobile terminal.
- UMTS works in the ranges from 1885-2025 MHz and 2110-2200 MHz and enables data rates of up to 2 Mbit / s in addition to the previously known functionality of the narrowband mobile radio systems.
- GSM Global System for Mobile Communications
- UMTS Mobile Switching Centers UMTS Mobile Switching Centers
- AMR Adaptive-Multi-Rate
- Such transcoding is conventionally carried out by decoding speech data transmitted in a first speech codec mode into 160 linear samples with 13 bits and subsequent encoding in a second speech codec mode.
- voice data which are transmitted to the switching center within a speech frame (speech frame) sent by a radio network UTRAN at a distance of 20 ms are decoded by means of a decoding device, the voice data being previously stored in a first AMR (Adaptive-Multi Rate) codec mode.
- the speech data contained in the speech frame are converted into linear pulse code modulated (PCM) words with a length of, for example, 13 bits.
- PCM linear pulse code modulated
- the A / ⁇ -Läw After the A / ⁇ -Läw, these are then compressed into words with an information content of 8 bits and time-multiplexed via the time division multiplexing switching matrix.
- the time-multiplexed data is decompressed into linear pulse-coded words with an information content of, for example, 13 bits and then encoded in a new AMR codec mode.
- the transmission to and from the UTRAN radio network takes place with a delay of 20 ms. Furthermore, the coding and decoding and the A / ⁇ -law compression result in a loss of quality of the speech data to be coded or decoded and of the linear pulse code-modulated words to be compressed.
- the voice data to be transmitted can be transmitted either in different codec modes with different RFCIs assigned to them or with the same codec modes and different RFCIs or with the same codec modes and same RFCIs. If different RFCIs are used, a mismatch (RFCI mismatch) can occur despite the use of the same codec modes. Such an RFCI mismatch is conventionally avoided by the transcoding described above, which results in long delay times and a reduction in the speech quality.
- the object of the present invention is to further develop a method and a device for resolving or avoiding a mismatch of the RFCIs, which are assigned to the codec modes of the encoded speech data in a communication network based on speech compression, in such a way that an almost delay-free conversion Conversion of the voice data and an improved voice quality within the communication network is available.
- An essential point of the invention lies in the fact that speech data transmitted within a transcoder with a first assignment character and entering the transcoder bypassing an encoding and decoding device and a time-division multiplexing switching matrix are routed to the output of the transcoder by means of a U-conductor device who- provided that the voice data transmitted with the first " assignment character and the voice data transmitted with the second assignment character are encoded in the same voice codec mode.
- the incoming voice data are preferably sent directly from the output of an input-side device for adapting the assignment character by means of a UP protocol routed the input of an output-side device for adapting the allocation sign.
- Bypassing the TDM-KoppeTfeTde has the consequence that an almost delay-free adaptation of the RFCIs (assignment characters) of the speech data is possible with the first and the second RFCI.
- Bypassing the coding and decoding devices means that there is no reduction in quality during the coding and decoding phases. Rather, after carrying out an initial check as to whether the codec modes currently used are the same or not, transcoding will take place, even if the different RFCIs assigned to the voice data are to be implemented in the UP protocol. As a result, the speech data pass through the entire transcoder without coding or decoding, provided that the speech data are encoded with the same codec modes. As a result, transcoding is not necessary.
- Possible speech codec modes for the speech data received from a radio network UTRAN or sent to the UTRAN as part of a speech connection are modes of speech codecs such as adaptive multi-rate codecs, codecs for the compression of speech data, codecs for the adaptive differential pulse Code modulation and codecs to improve the transmission rate and transmission quality in question.
- the incoming and outgoing voice data with respect to the exchange can differ from one another within a voice frame in one voice codec mode or in several voice codec modes.
- a U guide device which is " preferably directly connected to the devices for adapting the RFCIs, can advantageously be software in a digital signal processor (DSP), a field programmable gate array (FPGA), an application specific integrated circuit (ASIC) or
- the digital signal processor can, for example, additionally contain a switching device for activating or deactivating the diverting device, which is implemented within the diverting device or connected to the diverting device it is possible for the voice data to be transcoded by deactivating the redirection device in the conventional manner, namely by means of the coding and decoding devices and the compression and decompression devices and by connecting the TDM coupling elfeldes.
- a device for resolving or avoiding a mismatch of the RFCIs of encoded speech data, in particular of speech data encoded in an AMR codec mode advantageously has, in addition to the redirection device, a checking device which is suitable for determining whether the speech data is associated with the the first RFCI and speech data are encoded with the second RFCI in the identical speech codec mode or speech codec modes. If the checking device determines that there are matching speech codec modes, the switching device activates the diverting device. In this way, the transcoder can be quickly switched from its transcoding state to a transmission state in order to avoid time delays.
- Fig. 1 is a schematic representation of a conventional
- FIG. 2 shows a schematic representation of the method according to the invention for the solution or avoidance of a mismatch of RFCIs according to an exemplary embodiment with device aspects.
- the conventional method shown in FIG. 1 for resolving or avoiding mismatches of RFCIS with device aspects represents a method as it is carried out within a transcoder, which can be arranged in a communication network based on the UMTS standard.
- Speech data are sent from a radio network UTRAN 1 to an A-synchronous transfer mode layer (ATM layer) 2a, 2b and by means of an ATM adaptation layer 2 (AAL 2) 3a, 3b in ATM cells with variable bit rates with connection-oriented Real-time transmission seg ent.
- ATM layer A-synchronous transfer mode layer
- ATM adaptation layer 2 AAL 2
- means 4a, b for adapting the RFCIs which represent a reference point between the UTRAN and a CN (corporate network) or UTRAN and UTRAN or CN and CN in the user plane, are used to compare the RFCIs carried out.
- a coding and decoding device 5a and 5b adaptive multi-rate codec
- the incoming speech data coded in an AMR codec mode are decoded and converted into linear pulse code modulated words with an information content of 13 bits.
- pulse code-modulated words are then, according to the A / ⁇ law, with compression and decompression devices 6a and 6b are compressed into words of 8 bit "Ihformationsgehalt and looped back via a Time Division Multiplexing (TDM) -Koppelfeld 8 via El interfaces 7a and 7b to be decompressed below by means of the decompression and compression means 6a and 6b, and with to be coded in a new AMR codec mode by means of the coding device 5a and 5b
- TDM Time Division Multiplexing
- the reference numerals 9a and 9b, 10a and 10b represent the directions of the incoming and outgoing coded speech data.
- FIG. 2 shows a schematic illustration of an exemplary embodiment of the method according to the invention with device aspects. Parts corresponding to FIG. 1 or the same method steps are provided with the same reference numerals.
- a redirection device 11 is arranged directly behind the devices 4a and 4b for adapting the RFCIs, which by means of the loop-like connections 16 and 17 direct redirection of the outputs of the devices 4a and 4b to Adaptation of the RFCIs to allow incoming coded speech data to the inputs of the other devices 4b, 4a to adapt the RFCIs.
- the RFCI mismatch is corrected by treatment using the UP protocol in the output-side device 4a and 4b for adapting the RFCIs.
- Activation of the diverter device is possible by means of a switching device which holds the switches 12-15 u, as is shown as the instantaneous situation in the illustration in FIG. 2.
- deactivation of the diversion direction that the switches 12-15 are switched over to the connections 18-21, which in turn have coding and decoding devices as well as compression and decompression devices and an additional TDM switching matrix 8, as is shown, for example, in FIG 1 shown can be connected.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Telephonic Communication Services (AREA)
- Time-Division Multiplex Systems (AREA)
Abstract
Description
Claims
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/DE2002/000976 WO2003079711A1 (de) | 2002-03-18 | 2002-03-18 | Verfahren und vorrichtung zur auflösung einer fehlanpassung in umts-kommunikationsnetzen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1486086A1 true EP1486086A1 (de) | 2004-12-15 |
Family
ID=27815468
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP02727240A Withdrawn EP1486086A1 (de) | 2002-03-18 | 2002-03-18 | Verfahren und vorrichtung zur auflösung einer fehlanpassung in umts-kommunikationsnetzen |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP1486086A1 (de) |
| CN (1) | CN1623337A (de) |
| AU (1) | AU2002257534A1 (de) |
| BR (1) | BR0215649A (de) |
| DE (1) | DE10296658D2 (de) |
| WO (1) | WO2003079711A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1622938A1 (de) | 2003-05-09 | 2006-02-08 | University Of Massachusetts Medical Center | Nicht-humane tiere, die moleküle des heterologen komplementrezeptors typ 1 (cr1) auf erythrozyten exprimieren und deren anwendung |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1158823A1 (de) * | 2000-05-22 | 2001-11-28 | TELEFONAKTIEBOLAGET LM ERICSSON (publ) | Verfahren für eine Verbindung durch ein Kernnetz |
-
2002
- 2002-03-18 AU AU2002257534A patent/AU2002257534A1/en not_active Abandoned
- 2002-03-18 EP EP02727240A patent/EP1486086A1/de not_active Withdrawn
- 2002-03-18 BR BR0215649-0A patent/BR0215649A/pt not_active IP Right Cessation
- 2002-03-18 CN CN02828571.9A patent/CN1623337A/zh active Pending
- 2002-03-18 WO PCT/DE2002/000976 patent/WO2003079711A1/de not_active Ceased
- 2002-03-18 DE DE10296658T patent/DE10296658D2/de not_active Expired - Fee Related
Non-Patent Citations (1)
| Title |
|---|
| See references of WO03079711A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2002257534A1 (en) | 2003-09-29 |
| BR0215649A (pt) | 2004-12-21 |
| DE10296658D2 (de) | 2005-01-27 |
| CN1623337A (zh) | 2005-06-01 |
| WO2003079711A1 (de) | 2003-09-25 |
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| RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: VALENZUELA, ALEJANDRO Inventor name: SEITTER, NORBERT Inventor name: SCHMUTZLER, WERNER Inventor name: NEDELEC, THIERRY Inventor name: BACHMANN, FRANK |
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| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: NOKIA SIEMENS NETWORKS GMBH & CO. KG |
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| RAP3 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: NOKIA SIEMENS NETWORKS S.P.A. |
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| RAP3 | Party data changed (applicant data changed or rights of an application transferred) |
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| STAA | Information on the status of an ep patent application or granted ep patent |
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Effective date: 20080827 |