WO1995012257B1 - Apparatus and method for adapting a digital radiotelephone system to increased subscriber traffic - Google Patents

Apparatus and method for adapting a digital radiotelephone system to increased subscriber traffic

Info

Publication number
WO1995012257B1
WO1995012257B1 PCT/US1994/010997 US9410997W WO9512257B1 WO 1995012257 B1 WO1995012257 B1 WO 1995012257B1 US 9410997 W US9410997 W US 9410997W WO 9512257 B1 WO9512257 B1 WO 9512257B1
Authority
WO
WIPO (PCT)
Prior art keywords
data rate
predetermined data
signal
subscriber
vocoder
Prior art date
Application number
PCT/US1994/010997
Other languages
French (fr)
Other versions
WO1995012257A1 (en
Filing date
Publication date
Priority claimed from US08/144,166 external-priority patent/US5649299A/en
Application filed filed Critical
Priority to KR1019950702651A priority Critical patent/KR0171252B1/en
Priority to EP94931781A priority patent/EP0676102A4/en
Priority to JP7512638A priority patent/JPH08505511A/en
Priority to AU80730/94A priority patent/AU8073094A/en
Priority to BR9405976A priority patent/BR9405976A/en
Publication of WO1995012257A1 publication Critical patent/WO1995012257A1/en
Publication of WO1995012257B1 publication Critical patent/WO1995012257B1/en
Priority to FI953184A priority patent/FI953184A0/en

Links

Abstract

A digital radiotelephone system employs vocoders (401, 403) to convert between analog speech and a digital format suitable for transmission via radio. Under most circumstances, the highest data rate is selected for optimum audio quality. When the system occupancy exceeds a particular threshold, as detected at the fixed site of the system, some or all of the vocoders (401, 403) are instructed to switch to a lower data rate to provide for an increase in the number of communication channels. Further, a portable subscriber unit (103, 111, 113) may autonomously change its vocoder data rate depending upon the charge state of its battery.

Claims

AMENDED CLAIMS
[received by the International Bureau on 19 April 1995 (19.04.95); original claims 1, 2, 7 and 9 amended; remaining claims unchanged (5 pages)]
1. A digital radiotelephone system including a fixed station, having a radio transceiver and a first vocoder to convert a first analog signal to a digital signal at a first predetermined data rate, for transmitting to and receiving from a radio coverage area to provide service to a plurality of subscriber units within the radio coverage area, a first subscriber unit of said plurality of subscriber units employing a second vocoder to convert a second analog signal to a digital signal at the first predetermined data rate, comprising: a system occupancy detector, coupled to the radio transceiver, which provides an output signal related to a number of the plurality of subscriber units actively receiving service from the fixed station in the radio coverage area; and a threshold detector which monitors said output signal and generates an instruction to at least one of the first and second vocoders to change from the first predetermined data rate to a second predetermined data rate.
2. A digital radiotelephone system in accordance with claim 1 further comprising a transmitter which conveys a signal from said threshold detector to the second vocoder via the fixed station.
3. A digital radiotelephone system in accordance with claim 1 wherein said threshold detector further comprises a first threshold which, when exceeded by said output signal, generates said instruction to said at least one of said first and second vocoders to reduce said first predetermined data rate to said second predetermined data rate. 4. A subscriber unit for a digital radiotelephone system having a fixed station with at least one radio transceiver and a first vocoder to convert a first analog signal to a digital signal at a first predetermined data rate to provide service to a plurality of subscriber units within a radio coverage area of the fixed station, each of the plurality of subscriber units employing a second vocoder to convert a second analog signal to a digital signal at the first predetermined data rate, the subscriber unit comprising: an operating parameter detector, whereby an operating characteristic of the subscriber unit is monitored and a signal generated when a predetermined threshold is crossed; and a resource controller which receives said signal from said operating parameter detector and which generates an instruction to at least one of the first and second vocoders to change from the first predetermined data rate to a second predetermined data rate.
5. A subscriber unit in accordance with claim 4 wherein said operating parameter detector further comprises a battery state of charge detector.
1 7 6. A digital radiotelephone system including a fixed station, having a radio transceiver and a first vocoder to convert a first analog signal to a digital signal at a first predetermined data rate, for transmitting to and receiving from a radio coverage area to provide service to a plurality of subscriber units within the radio coverage area, each subscriber unit employing a second vocoder to convert a second analog signal to a digital signal at the first predetermined data rate, comprising: a first group of subscriber units predeterminedly assigned a priority level; a system occupancy detector, coupled to the radio transceiver, which provides an output signal related to a number of the plurality of subscriber units actively receiving service from the digital radiotelephone system in the radio coverage area; a subscriber priority list and list scanner which selects said first group of subscriber units; and a threshold detector which monitors said output signal and generates an instruction to at least one of the first and second vocoders of a selected first priority subscriber unit to change from the first predetermined data rate to a second predetermined data rate.
1 8 7. A method of adaptation of a digital radiotelephone system to increased subscriber traffic, the digital radiotelephone system including a fixed station having a radio transceiver and a first vocoder to convert a first analog signal to a digital signal at a first predetermined data rate, for transmitting to and receiving from a radio coverage area to provide service to a plurality of subscriber units within the radio coverage area, a first subscriber unit, of said plurality of subscriber units, employing a second vocoder to convert a second analog signal to a digital signal at the first predetermined data rate, the method comprising the steps of: detecting spectrum occupancy at the radio transceiver and providing an output signal related to the number of the plurality of subscriber units actively receiving service from the fixed station in the radio coverage area; and generating an instruction, in response to said provided output signal, to at least one of the first and second vocoders to change from the first predetermined data rate to a second predetermined data rate.
8. A method in accordance with the method of claim 7 further comprising the step of generating said instruction to said at least one of said first and second vocoders to reduce said first predetermined data rate to said second predetermined data rate when said output signal exceeds a first threshold.
9. A method in accordance with the method of claim 8 further comprising the step of generating an instruction to said at least one of said first and second vocoders to increase the data rate from said second predetermined data rate to said first predetermined data rate when said output signal crosses a second threshold.
1 9 10. A method of adaptation of a subscriber unit employed in a digital radiotelephone system having a fixed station with at least one radio transceiver and a first vocoder to convert a first analog signal to a digital signal at a first predetermined data rate, the fixed station providing service to a plurality of subscriber units within a radio coverage area of the fixed station, each of the plurality of subscriber units employing a second vocoder to convert a second analog signal to a digital signal at the first predetermined data rate, the method comprising the steps of: detecting an operating parameter of the subscriber unit, whereby an operating characteristic is monitored and a signal generated when a predetermined threshold is crossed; and generating, in response to said signal, an instruction to at least one of the first and second vocoders to change from the first predetermined data rate to a second predetermined data rate.
2 0 STATEMENT UNDER ARTICLE 19
In the search report, claims 1-3 and 7-10 were indicated as lacking inventive step because of Patsiokas et al. (US-A- 5,203,012) and Hluchyj et al. (US-A-5,115,429) . The Patsiokas reference describes a system where a plurality of transceivers measures a received signal when a subscriber originates a call. The transceiver which receives the best signal is then assigned to handle the call. In Hluchyj, a network is described in which a congestion indicator is passed along with the data header in a landline network. The present invention teaches an apparatus and method which provides an output signal related to a number of the plurality of subscriber units. This is then used to determine if the vocoder rates are to be adjusted. This is not shown or taught by the Patsiokas or Hluchyj references.
Therefore, Applicants contend that ζlaims 1-3 and 7-10 are novel over those references.
The search report also indicated that claim 4 and 5 lack an inventive step in view of Bruckert (US-A-5,305,468) . In Bruckert, a signal received at the base site is measured and used for prediction. In the present invention, an operating characteristic of the subscriber unit is measured by an operating parameter detector of the subscriber unit. This is not shown or taught in the references and is believed to provide an inventive step over that which is shown.
21
PCT/US1994/010997 1993-10-27 1994-09-29 Apparatus and method for adapting a digital radiotelephone system to increased subscriber traffic WO1995012257A1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
KR1019950702651A KR0171252B1 (en) 1993-10-27 1994-09-29 Apparatus and method for adapting a digital radiotelephone system to increased subscriber traffic
EP94931781A EP0676102A4 (en) 1993-10-27 1994-09-29 Apparatus and method for adapting a digital radiotelephone system to increased subscriber traffic.
JP7512638A JPH08505511A (en) 1993-10-27 1994-09-29 Apparatus and method for adapting a digital wireless telephone system to increasing subscriber traffic
AU80730/94A AU8073094A (en) 1993-10-27 1994-09-29 Apparatus and method for adapting a digital radiotelephone system to increased subscriber traffic
BR9405976A BR9405976A (en) 1993-10-27 1994-09-29 Subscriber unit digital radiotelephony system for the same adaptation process of digital radiotelephony system and subscriber unit adaptation process
FI953184A FI953184A0 (en) 1993-10-27 1995-06-27 Device and method for adapting a digital mobile telephone system to increased subscriber traffic

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/144,166 US5649299A (en) 1993-10-27 1993-10-27 Apparatus and method for adapting a digital radiotelephone system to increased subscriber traffic
US08/144,166 1993-10-27

Publications (2)

Publication Number Publication Date
WO1995012257A1 WO1995012257A1 (en) 1995-05-04
WO1995012257B1 true WO1995012257B1 (en) 1995-05-18

Family

ID=22507382

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1994/010997 WO1995012257A1 (en) 1993-10-27 1994-09-29 Apparatus and method for adapting a digital radiotelephone system to increased subscriber traffic

Country Status (11)

Country Link
US (1) US5649299A (en)
EP (1) EP0676102A4 (en)
JP (1) JPH08505511A (en)
KR (1) KR0171252B1 (en)
CN (1) CN1116023A (en)
AU (1) AU8073094A (en)
BR (1) BR9405976A (en)
FI (1) FI953184A0 (en)
FR (1) FR2711883B1 (en)
RU (1) RU2119256C1 (en)
WO (1) WO1995012257A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9564963B2 (en) 1995-06-30 2017-02-07 Interdigital Technology Corporation Automatic power control system for a code division multiple access (CDMA) communications system

Families Citing this family (77)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08340323A (en) * 1995-06-13 1996-12-24 Canon Inc Data communication equipment
US6349204B1 (en) * 1996-02-12 2002-02-19 British Telecommunications Public Limited Company Provision of telecommunications control program data pursuant to preliminary data exchange between system elements
US5983278A (en) * 1996-04-19 1999-11-09 Lucent Technologies Inc. Low-loss, fair bandwidth allocation flow control in a packet switch
US6044107A (en) * 1996-05-09 2000-03-28 Texas Instruments Incorporated Method for interoperability of a T1E1.4 compliant ADSL modem and a simpler modem
FI103850B (en) * 1996-07-12 1999-09-30 Nokia Mobile Phones Ltd Automatic control of communication mode
DE19634664A1 (en) * 1996-08-28 1998-03-05 Sel Alcatel Ag Method and device for setting a fee in a telecommunications network
FI107667B (en) 1996-09-03 2001-09-14 Nokia Networks Oy Method of setting the service level in a digital mobile communication system and digital mobile communication system
US5960327A (en) * 1996-12-06 1999-09-28 Motorola Method for a transceiver to select a channel
US5910944A (en) * 1997-02-28 1999-06-08 Motorola, Inc. Radio telephone and method for operating a radiotelephone in slotted paging mode
US5940763A (en) * 1997-04-23 1999-08-17 Ericsson, Inc. Enhanced preemption within a mobile telecommunications network
GB2325376B (en) * 1997-05-14 2001-09-19 Dsc Telecom Lp Allocation of bandwidth to calls in a wireless telecommunications system
GB2325381A (en) * 1997-05-17 1998-11-18 Motorola Ltd Dual Speed Communications Apparatus
US6014568A (en) * 1997-09-30 2000-01-11 Ericsson Inc. Location-based voice coder selection
GB2332820A (en) * 1997-12-23 1999-06-30 Northern Telecom Ltd cOMMUNICATION SYSTEM HAVING A REDUCED DATA RATE FOR HIGH TRAFFIC LEVELS
US6292664B1 (en) * 1998-02-06 2001-09-18 Telefon Aktiebolaget Lm Ericsson (Publ) Channel quality in wireless communications
WO1999053700A1 (en) * 1998-04-10 1999-10-21 Telefonaktiebolaget Lm Ericsson (Publ) Increasing traffic capacity in a cellular communications system by change of traffic channel rate
DE19821111C2 (en) * 1998-05-06 2003-09-18 Vodafone Ag Method for establishing a voice connection and device for carrying out the method
US6529730B1 (en) * 1998-05-15 2003-03-04 Conexant Systems, Inc System and method for adaptive multi-rate (AMR) vocoder rate adaption
AU5389699A (en) * 1998-07-13 2000-02-01 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for determining optimal time differences between communication channels
US7047185B1 (en) * 1998-09-15 2006-05-16 Skyworks Solutions, Inc. Method and apparatus for dynamically switching between speech coders of a mobile unit as a function of received signal quality
US6295453B1 (en) 1998-10-07 2001-09-25 Telefonaktiebolaget Lm Ericsson (Publ) Multi-full rate channel assignment for a cellular telephone system
US6738637B1 (en) * 1998-12-16 2004-05-18 Lucent Technologies Inc. Dynamic variation of class of service in a communication network based on network resources
KR100584394B1 (en) * 1998-12-30 2006-08-30 삼성전자주식회사 Vocoder parameter control method by real time network monitoring
WO2002045454A1 (en) * 1999-06-03 2002-06-06 Matsushita Electric Industrial Co., Ltd. Base station device and circuit connection control method
US6166522A (en) * 1999-06-08 2000-12-26 Motorola, Inc. Battery conditioning scheme
US6873597B1 (en) * 1999-08-11 2005-03-29 Nortel Networks Limited Reduced data rate communication system
US6463274B1 (en) * 1999-10-26 2002-10-08 Denso Corporation Multiple class of service determination for digital cellular telephones
KR100573070B1 (en) * 1999-11-08 2006-04-24 주식회사 케이티 Method for determining number of service channels of data traffic
FR2803476B1 (en) * 1999-12-31 2003-01-10 Cit Alcatel METHOD FOR ESTABLISHING AN OPERATING MODE WITHOUT DOUBLE TRANSCODING IN A CELLULAR MOBILE RADIO COMMUNICATION SYSTEM
JP2001333161A (en) 2000-05-18 2001-11-30 Nec Corp Portable terminal
US6813497B2 (en) * 2000-10-20 2004-11-02 Leap Wirelesss International Method for providing wireless communication services and network and system for delivering same
WO2002037700A2 (en) * 2000-11-01 2002-05-10 Airnet Communications Corporation Dynamic wireless link adaptation
DK1206104T3 (en) * 2000-11-09 2006-10-30 Koninkl Kpn Nv Measuring a call quality of a telephone connection in a telecommunications network
US6745012B1 (en) * 2000-11-17 2004-06-01 Telefonaktiebolaget Lm Ericsson (Publ) Adaptive data compression in a wireless telecommunications system
US20030003960A1 (en) * 2000-12-01 2003-01-02 Takahiro Shoji Base station apparatus and channel access control method
US7545849B1 (en) 2003-03-28 2009-06-09 Google Inc. Signal spectrum spreading and combining system and method
US8374218B2 (en) 2000-12-05 2013-02-12 Google Inc. Combining signals with a shuffled-hadamard function
US6829289B1 (en) * 2000-12-05 2004-12-07 Gossett And Gunter, Inc. Application of a pseudo-randomly shuffled hadamard function in a wireless CDMA system
US8385470B2 (en) * 2000-12-05 2013-02-26 Google Inc. Coding a signal with a shuffled-Hadamard function
US6982945B1 (en) 2001-01-26 2006-01-03 Google, Inc. Baseband direct sequence spread spectrum transceiver
US6754221B1 (en) 2001-02-15 2004-06-22 General Bandwidth Inc. System and method for selecting a compression algorithm according to an available bandwidth
CN1310453C (en) * 2001-09-26 2007-04-11 中兴通讯股份有限公司 Distribution method and device for CDMA vocoder time chip resources
US7453921B1 (en) * 2001-12-11 2008-11-18 Google Inc. LPC filter for removing periodic and quasi-periodic interference from spread spectrum signals
GB2383232B (en) * 2001-12-14 2005-09-21 Ubinetics Ltd A radiotelephone system and a method of operating same
US7031254B2 (en) * 2002-01-25 2006-04-18 Lucent Technologies Inc. Rate control system and method for a link within a wireless communications system
ES2244701T3 (en) * 2002-06-12 2005-12-16 Siemens Aktiengesellschaft PROCEDURE FOR THE TRANSMISSION OF DATA IN A RADIOCOMMUNICATION SYSTEM.
US7054642B1 (en) 2002-09-27 2006-05-30 Bellsouth Intellectual Property Corporation Apparatus and method for providing reduced cost cellular service
US7006831B2 (en) * 2002-09-27 2006-02-28 Bellsouth Intellectual Property Corporation Apparatus and method for providing dynamic communications network traffic control
US7352833B2 (en) * 2002-11-18 2008-04-01 Google Inc. Method and system for temporal autocorrelation filtering
US7120447B1 (en) * 2003-02-24 2006-10-10 Nortel Networks Limited Selectable mode vocoder management algorithm for CDMA based networks
US20040181611A1 (en) * 2003-03-14 2004-09-16 Viresh Ratnakar Multimedia streaming system for wireless handheld devices
KR101005653B1 (en) * 2003-03-17 2011-01-05 텔레호낙티에볼라게트 엘엠 에릭슨(피유비엘) Receiver performance control
US20050096102A1 (en) * 2003-11-05 2005-05-05 Motorola, Inc Remotely initiated low power mode
US20050107107A1 (en) * 2003-11-19 2005-05-19 Reza Shahidi Dynamic voice over data prioritization for wireless communication networks
US7328027B1 (en) 2004-05-11 2008-02-05 Sprint Spectrum L.P. Method for vocoder selection based on loads in coverage areas of a wireless wide area network
JP2006191455A (en) * 2005-01-07 2006-07-20 Nec Corp Radio mobile communication method, radio mobile communication system, base station controller and radio mobile terminal
DE102005001258A1 (en) * 2005-01-11 2006-07-20 Siemens Ag Circuit arrangement and method for data transmission
US20070043558A1 (en) * 2005-08-22 2007-02-22 Uwe Schwarz Priority-Based Resource Allocation
US7756524B1 (en) * 2006-01-31 2010-07-13 Nextel Communications Inc. System and method for partially count-based allocation of vocoder resources
US8036242B2 (en) 2006-02-15 2011-10-11 Qualcomm Incorporated Dynamic capacity operating point management for a vocoder in an access terminal
US8116289B2 (en) * 2006-08-30 2012-02-14 Cisco Technology, Inc. Internetworking nodes based on connections, membership, and location
EP2087662B1 (en) * 2006-11-28 2012-11-28 Telefonaktiebolaget LM Ericsson (publ) A method and a system for down link control in a cellular telephony system
US8050932B2 (en) * 2008-02-20 2011-11-01 Research In Motion Limited Apparatus, and associated method, for selecting speech COder operational rates
US8107438B1 (en) 2008-06-18 2012-01-31 Sprint Spectrum L.P. Method for initiating handoff of a wireless access terminal based on the reverse activity bit
US8615398B2 (en) 2009-01-29 2013-12-24 Qualcomm Incorporated Audio coding selection based on device operating condition
US8254930B1 (en) 2009-02-18 2012-08-28 Sprint Spectrum L.P. Method and system for changing a media session codec before handoff in a wireless network
US9374306B1 (en) 2009-03-04 2016-06-21 Sprint Spectrum L.P. Using packet-transport metrics for setting DRCLocks
US9467938B1 (en) 2009-04-29 2016-10-11 Sprint Spectrum L.P. Using DRCLocks for conducting call admission control
US8310929B1 (en) * 2009-06-04 2012-11-13 Sprint Spectrum L.P. Method and system for controlling data rates based on backhaul capacity
US8245088B1 (en) 2009-06-30 2012-08-14 Sprint Spectrum L.P. Implementing quality of service (QoS) by using hybrid ARQ (HARQ) response for triggering the EV-DO reverse activity bit (RAB)
US8204000B1 (en) 2009-07-23 2012-06-19 Sprint Spectrum L.P. Achieving quality of service (QoS) by using the reverse activity bit (RAB) in creation of neighbor lists for selected access terminals
US8363564B1 (en) 2010-03-25 2013-01-29 Sprint Spectrum L.P. EVDO coverage modification based on backhaul capacity
US8515434B1 (en) 2010-04-08 2013-08-20 Sprint Spectrum L.P. Methods and devices for limiting access to femtocell radio access networks
WO2013086340A1 (en) 2011-12-09 2013-06-13 Howmedica Osteonics Corp. Surgical reaming instrument for shaping a bone cavity
EP2797520A1 (en) 2011-12-30 2014-11-05 Howmedica Osteonics Corp. Systems for preparing bone voids to receive a prosthesis
US9526513B2 (en) 2013-03-13 2016-12-27 Howmedica Osteonics Corp. Void filling joint prosthesis and associated instruments
US10299929B2 (en) 2015-01-12 2019-05-28 Howmedica Osteonics Corp. Bone void forming apparatus

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4435840A (en) * 1981-06-22 1984-03-06 Nippon Electric Co., Ltd. Radio mobile communication system wherein probability of loss of calls is reduced without a surplus of base station equipment
IL79775A (en) * 1985-08-23 1990-06-10 Republic Telcom Systems Corp Multiplexed digital packet telephone system
US4701943A (en) * 1985-12-31 1987-10-20 Motorola, Inc. Paging system using LPC speech encoding with an adaptive bit rate
EP0538546B1 (en) * 1986-03-25 2004-06-23 Motorola Inc. Method and apparatus for controlling a TDM communication device
US5164652A (en) * 1989-04-21 1992-11-17 Motorola, Inc. Method and apparatus for determining battery type and modifying operating characteristics
US5185566A (en) * 1990-05-04 1993-02-09 Motorola, Inc. Method and apparatus for detecting the state of charge of a battery
US5038399A (en) * 1990-05-21 1991-08-06 Motorola, Inc. Method for assigning channel reuse levels in a multi-level cellular system
US5115429A (en) * 1990-08-02 1992-05-19 Codex Corporation Dynamic encoding rate control minimizes traffic congestion in a packet network
US5095539A (en) * 1990-08-20 1992-03-10 Amaf Industries, Inc. System and method of control tone amplitude modulation in a linked compression-expansion (Lincomplex) system
NZ239283A (en) * 1990-08-23 1994-09-27 Ericsson Telefon Ab L M Mobile cellular radio: handoff between half rate and full rate channels according to estimated received signal quality
US5128959A (en) * 1991-02-22 1992-07-07 Motorola, Inc. Variable bandwidth CDMA radio system
US5235614A (en) * 1991-03-13 1993-08-10 Motorola, Inc. Method and apparatus for accommodating a variable number of communication channels in a spread spectrum communication system
DE69233502T2 (en) * 1991-06-11 2006-02-23 Qualcomm, Inc., San Diego Vocoder with variable bit rate
US5241565A (en) * 1991-06-25 1993-08-31 Microcom Systems, Inc. Method and apparatus for effecting efficient transmission of data
US5203012A (en) * 1992-02-10 1993-04-13 Motorola, Inc. Method and apparatus for optimum channel assignment
US5305468A (en) * 1992-03-18 1994-04-19 Motorola, Inc. Power control method for use in a communication system
ZA946674B (en) * 1993-09-08 1995-05-02 Qualcomm Inc Method and apparatus for determining the transmission data rate in a multi-user communication system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9564963B2 (en) 1995-06-30 2017-02-07 Interdigital Technology Corporation Automatic power control system for a code division multiple access (CDMA) communications system

Similar Documents

Publication Publication Date Title
WO1995012257B1 (en) Apparatus and method for adapting a digital radiotelephone system to increased subscriber traffic
RU2119256C1 (en) Digital radiotelephone system, subscriber's device, and methods for their adapting to increasing connected load
EP0624994B1 (en) Hand-off method and mobile station for spread spectrum communications system
US6122505A (en) Communication system with base stations having test capabilities
CN1134941C (en) Multi-hop packet radio networks
KR100667411B1 (en) Method and apparatus for variable and fixed forward link rate control in a mobile radio communication system
EP0678230B1 (en) Radio link parameter monitoring in a wireless communications system
JP3418463B2 (en) Digital mobile telephone communication method and communication channel switching method, and mobile station and base station for realizing them
JPH0453460B2 (en)
RU98117837A (en) WIRELESS TELECOMMUNICATIONS NETWORKS TOGETHER USING THE GLOBAL MOBILE COMMUNICATION SYSTEM AND MULTIPLE ACCESS WITH CODE DIVISION OF CHANNELS
EP0626769A2 (en) Network synchronization for TDMA cellular communication using signals from mobile stations in neighboring cells
WO1995031879A3 (en) Control of handover and transmission power control of mobile station in a mobile telecommunications system
EP2040388A3 (en) Method and system for mobile communications
CN1086945A (en) Be used to adjust the method and apparatus of transmitting power
CA2396725A1 (en) Mobile equipment based filtering for packet radio service applications
US20040162101A1 (en) Apparatus and method for measuring thermal noise power in a mobile communication system
CA2277840A1 (en) Method and apparatus for controlling the use of discontinuous transmission in a cellular telephone
EP0749256A2 (en) TDMA mobile communication system and handover method therefor
CA2225205C (en) Method and base station system for voice transmission via a radio interface in a digital radio communication system having mobile stations and base stations
CA2375786A1 (en) Method and apparatus for using frame energy metrics to improve rate determination
GB2285724A (en) Selecting a channel in a TDMA system according to a variable threshold value
WO1997022219A3 (en) Method and apparatus for indicating to a wireless network the operational mode of a wireless communicator
US6542737B1 (en) Method for checking speech channel of base station and vocoder of control station in mobile communication system
US6876638B1 (en) Mobile unit adapted for packet communication, zone transfer method, and computer readable recording medium for recording program executed by computer
WO2004089033A1 (en) System and method for minimizing voice packet loss during a wireless communications device candidate frequency search (cfs)