SE9803886D0 - An apparatus and method for the enhancement of speech quality in mobile communications - Google Patents

An apparatus and method for the enhancement of speech quality in mobile communications

Info

Publication number
SE9803886D0
SE9803886D0 SE9803886A SE9803886A SE9803886D0 SE 9803886 D0 SE9803886 D0 SE 9803886D0 SE 9803886 A SE9803886 A SE 9803886A SE 9803886 A SE9803886 A SE 9803886A SE 9803886 D0 SE9803886 D0 SE 9803886D0
Authority
SE
Sweden
Prior art keywords
speech quality
error control
control coding
enhancement
utilised
Prior art date
Application number
SE9803886A
Other languages
Swedish (sv)
Other versions
SE515700C2 (en
SE9803886L (en
Inventor
Carl Patrik Cerwall
Original Assignee
Ericsson Telefon Ab L M
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 Ericsson Telefon Ab L M filed Critical Ericsson Telefon Ab L M
Priority to SE9803886A priority Critical patent/SE515700C2/en
Publication of SE9803886D0 publication Critical patent/SE9803886D0/en
Priority to AU14349/00A priority patent/AU1434900A/en
Priority to EP99972414A priority patent/EP1129589A1/en
Priority to CN 99813248 priority patent/CN1326650A/en
Priority to PCT/SE1999/001992 priority patent/WO2000030383A1/en
Priority to JP2000583278A priority patent/JP2002530955A/en
Publication of SE9803886L publication Critical patent/SE9803886L/en
Priority to ZA200104496A priority patent/ZA200104496B/en
Publication of SE515700C2 publication Critical patent/SE515700C2/en

Links

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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0006—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission format
    • H04L1/0007—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission format by modifying the frame length
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0014—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the source coding
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0015—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy
    • H04L1/0022—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy in which mode-switching is influenced by the user
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0026—Transmission of channel quality indication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0009—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding

Abstract

In conventional TDMA cellular mobile telephone systems, connections between one mobile station and the network conventionally utilise one time slot per TDMA frame and both the codec and the error control coding applied to the voice signal are based on a fixed number of bits. In areas of high interference, the user can request the enhancement of speech quality manually or by registering a permanent request. The network responds by allocating at least one further slot per TDMA frame to the connection. The same voice information is then spread over two slots while the additional capacity is utilised to implement a more powerful error control coding in addition to, or in place of, the regular error control coding. In a further embodiment, the additional capacity is utilised to apply an improved codec and so ameliorate the speech quality above that even of a fixed line.
SE9803886A 1998-11-13 1998-11-13 Device, mobile phone and method of improving call quality in a time-shared mobile telephone network SE515700C2 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
SE9803886A SE515700C2 (en) 1998-11-13 1998-11-13 Device, mobile phone and method of improving call quality in a time-shared mobile telephone network
AU14349/00A AU1434900A (en) 1998-11-13 1999-11-04 An apparatus and method for the enhancement of speech quality in mobile communications
EP99972414A EP1129589A1 (en) 1998-11-13 1999-11-04 An apparatus and method for the enhancement of speech quality in mobile communications
CN 99813248 CN1326650A (en) 1998-11-13 1999-11-04 Apparatus and method for enhancement of speech quality in mobile communications
PCT/SE1999/001992 WO2000030383A1 (en) 1998-11-13 1999-11-04 An apparatus and method for the enhancement of speech quality in mobile communications
JP2000583278A JP2002530955A (en) 1998-11-13 1999-11-04 Apparatus and method for improving call quality in mobile communication
ZA200104496A ZA200104496B (en) 1998-11-13 2001-05-31 An apparatus and method for the enhancement of speech quality in mobile communications.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9803886A SE515700C2 (en) 1998-11-13 1998-11-13 Device, mobile phone and method of improving call quality in a time-shared mobile telephone network

Publications (3)

Publication Number Publication Date
SE9803886D0 true SE9803886D0 (en) 1998-11-13
SE9803886L SE9803886L (en) 2000-05-14
SE515700C2 SE515700C2 (en) 2001-09-24

Family

ID=20413279

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9803886A SE515700C2 (en) 1998-11-13 1998-11-13 Device, mobile phone and method of improving call quality in a time-shared mobile telephone network

Country Status (7)

Country Link
EP (1) EP1129589A1 (en)
JP (1) JP2002530955A (en)
CN (1) CN1326650A (en)
AU (1) AU1434900A (en)
SE (1) SE515700C2 (en)
WO (1) WO2000030383A1 (en)
ZA (1) ZA200104496B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6973140B2 (en) * 1999-03-05 2005-12-06 Ipr Licensing, Inc. Maximizing data rate by adjusting codes and code rates in CDMA system
JP4514172B2 (en) * 2000-09-28 2010-07-28 キヤノン株式会社 Wireless communication device and method for controlling wireless communication device
DE102004024651A1 (en) * 2004-05-18 2005-12-08 Siemens Ag Method and radio station for transmitting data over packet-switched transmission links
US20060209780A1 (en) * 2005-01-21 2006-09-21 Nokia Corporation Data transfer in TDMA system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI114178B (en) * 1995-01-09 2004-08-31 Nokia Corp Dynamic allocation of radio capacity in a TDMA system
US5701294A (en) * 1995-10-02 1997-12-23 Telefonaktiebolaget Lm Ericsson System and method for flexible coding, modulation, and time slot allocation in a radio telecommunications network
FI106182B (en) * 1996-11-27 2000-11-30 Nokia Networks Oy A method for improving connection quality and system capacity in a cellular radio system and a cellular radio system

Also Published As

Publication number Publication date
ZA200104496B (en) 2002-01-24
CN1326650A (en) 2001-12-12
WO2000030383A1 (en) 2000-05-25
JP2002530955A (en) 2002-09-17
EP1129589A1 (en) 2001-09-05
SE515700C2 (en) 2001-09-24
AU1434900A (en) 2000-06-05
SE9803886L (en) 2000-05-14

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