WO1998010540A2 - Data transmission method, and radio system - Google Patents

Data transmission method, and radio system Download PDF

Info

Publication number
WO1998010540A2
WO1998010540A2 PCT/FI1997/000524 FI9700524W WO9810540A2 WO 1998010540 A2 WO1998010540 A2 WO 1998010540A2 FI 9700524 W FI9700524 W FI 9700524W WO 9810540 A2 WO9810540 A2 WO 9810540A2
Authority
WO
WIPO (PCT)
Prior art keywords
transmission
time slots
assigned
different directions
radio system
Prior art date
Application number
PCT/FI1997/000524
Other languages
French (fr)
Other versions
WO1998010540A3 (en
Inventor
Kari Horneman
Sami Jokinen
Original Assignee
Nokia Telecommunications 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 Telecommunications Oy filed Critical Nokia Telecommunications Oy
Priority to AU42105/97A priority Critical patent/AU723996B2/en
Priority to JP10512290A priority patent/JP2000517503A/en
Priority to EP97940174A priority patent/EP0923820A2/en
Publication of WO1998010540A2 publication Critical patent/WO1998010540A2/en
Publication of WO1998010540A3 publication Critical patent/WO1998010540A3/en
Priority to NO991095A priority patent/NO991095L/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/16—Time-division multiplex systems in which the time allocation to individual channels within a transmission cycle is variable, e.g. to accommodate varying complexity of signals, to vary number of channels transmitted
    • H04J3/1682—Allocation of channels according to the instantaneous demands of the users, e.g. concentrated multiplexers, statistical multiplexers
    • 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
    • H04B7/2643—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using time-division multiple access [TDMA]
    • H04B7/2646—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using time-division multiple access [TDMA] for broadband transmission
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/14—Two-way operation using the same type of signal, i.e. duplex
    • H04L5/1469—Two-way operation using the same type of signal, i.e. duplex using time-sharing

Definitions

  • the invention relates to a data transmission method in a digital radio system where data between two transceivers is transmitted in both directions on the same frequency band in frames consisting of time slots, and where time slots assigned to different directions of transmission are separated from one another in the time domain.
  • a previously known solution to the above problem is to form a data transmission frame comprising time slots of different length.
  • a user needing more transmission capacity is assigned a longer time slot in both directions of transmission, whereas a user needing less transmission capacity is assigned a shorter time slot in both directions of transmission.
  • the drawback of the method is that the time slots of the frame are of a predefined length, and if not much data transmission capacity is needed, bandwidth is unnecessarily wasted in long time slots.
  • the object of the present invention is to provide a data transmission method and system in which a bandwidth assigned to the system can be divided according to the need flexibly and more effectively than before. Another object of the invention is to allow effective use of many-sided data transmission services in radio systems without that bandwidth is wasted.
  • the object is achieved by a method as described in the introduction, the method being characterized in that the number of time slots assigned to the different directions of transmission is varied dynamically according to the capacity needed in the different directions of transmission.
  • Yet another object of the invention is to provide a digital radio system which comprises at least one base station and a number of terminal equipments, and in which data between the base station and the terminal equipments is transmitted in both directions on the same frequency band in frames consisting of time slots, and in which the time slots assigned to the different directions of transmission are separated from one another in the time domain.
  • the radio system according to the invention is characterized in that the number of time slots assigned to the different directions of transmission on each frequency band can be varied dynamically according to the capacity needed in the different directions of transmission.
  • the solution of the invention has several advantages.
  • the number of time slots is varied according to the amount of capacity needed in the different directions of transmission. Consequently, the bandwidth available can be used as effectively and flexibly as possible.
  • the solution allows the use of high data transmission capacity requiring services (e.g. video calls) in systems where the bandwidth is limited.
  • fig. 1 shows a radio system in which the invention can be applied
  • fig. 2 shows a frame of the DECT system
  • fig. 3a shows a solution according to the invention for dividing the frame between different directions of transmission
  • fig. 3b shows a solution according to the invention in connection with the DECT system.
  • the method and receiver according to the invention can be applied in any digital radio system whatsoever where the directions of transmission are on the same frequency band and are separate from one another in the time domain.
  • This kind of multiple access method is called a FDMA-TDD method (Frequency Division Multiple Access - Time Division Duplex).
  • the essential parts of a structure of a typical radio system are described, by way of an example, in fig. 1.
  • the system comprises a base station 100, and a number of usually mobile subscriber terminals 102-104 with a both-way connection 106, 108 and 110, 112 to the base station 100.
  • data is transmitted 106 from the base station to e.g. terminal equipment 102 at the same frequency as from terminal equipment 102 to the base station 108, but the transmissions are not simultaneous.
  • the terminal equipments 102-104 communicate with the other parts of the system and with the fixed network via the base station 100.
  • An example of a system like this is the DECT system.
  • traffic between a terminal equipment and a base station is transferred in frames.
  • Fig. 2 shows an example of a DECT frame, which structurally is a frame typically used in the FDMA-TDD systems.
  • the overall length of the frame is t F , which in connection with the DECT is 10 ms.
  • the frame is divided into two parts 200, 202 of an equal size, where communication in different directions of transmission 106, 108 takes place.
  • both halves of the frame 200, 202 comprise 12 time slots, each one of which is used in a normal situation for transmitting one signal.
  • Time slots 1 and 13 carry information of one connection in both directions.
  • the number of time slots assigned to the different directions of transmission can be changed dynamically according to the need.
  • Fig. 3a shows an example of a solution according to the invention for dividing a frame between the different directions of transmission.
  • the overall length of the frame is t F
  • the number of time slots is n
  • the frame is further divided into two parts 300, 302, which are used for transmitting traffic in the different directions of transmission 106, 108.
  • the number of time slots assigned to the different directions of transmission is varied dynamically.
  • the size of parts 300, 302 is thus adjusted according to the need.
  • part 300 comprises k time slots 0...k-1
  • part 302 comprises n-k time slots k...n-1.
  • k n/2.
  • the number of time slots can be varied with the capacity needed in the different directions of transmission.
  • the base station monitors the capacity needed in the different directions of transmission and, if necessary, changes the number of time slots assigned to the different directions of transmission.
  • the base station naturally has to signal the current division of the frame structure to the terminal equipments.
  • the invention can also be applied in situations where more than one time slot is assigned to a connection between two transceivers. Since the different directions of transmission are assigned a different number of time slots, the number of time slots assigned for a connection in the different directions of transmission can be defined to be different according to the data transmission capacity needed.
  • time slots 0...8 - i.e. 9 time slots - are assigned to one direction of transmission 304, and time slots 9...23 - i.e. 15 time slots - to the other direction of transmission 306.
  • the radio system comprises at least one base station 100 and a number of terminal equipments 102-104. Data between the base station and the terminal equipments is transmitted in both directions 106, 108 on the same frequency band in frames comprising time slots. Time slots 300, 302 assigned to the different directions of transmission are separated from one another in the time domain. The number of time slots 300, 302 assigned to the different directions of transmission on each frequency band can be varied dynamically. In a preferred embodiment, the frame structure can be adjusted at the base station 100.

Abstract

A radio system and a data transmission method in a digital radio system where data between two transceivers is transmitted in both directions on the same frequency band in frames consisting of time slots, and where time slots (300, 302) assigned to different directions of transmission are separated from one another in the time domain. To allow effective use of the frequency band available, the number of time slots (300, 302) assigned to the different directions of transmission is varied dynamically.

Description

DATA TRANSMISSION METHOD, AND RADIO SYSTEM
FIELD OF INVENTION
The invention relates to a data transmission method in a digital radio system where data between two transceivers is transmitted in both directions on the same frequency band in frames consisting of time slots, and where time slots assigned to different directions of transmission are separated from one another in the time domain.
BACKGROUND OF INVENTION
In present mobile systems, an equal amount of transmission capacity is assigned to a user in both directions of transmission. In connection with normal transmission of speech, this is not a problem. When new data transmission services are introduced, more flexible use of transmission capacity is, however, important. In several data transmission services, for example, short search requests, for which little capacity is needed, are sent in one direction. In the other direction the data requested is transferred to the user, and so more capacity is needed. Since the bandwidth has to be defined in view of the maximum need, bandwidth is wasted.
A previously known solution to the above problem is to form a data transmission frame comprising time slots of different length. A user needing more transmission capacity is assigned a longer time slot in both directions of transmission, whereas a user needing less transmission capacity is assigned a shorter time slot in both directions of transmission. The drawback of the method is that the time slots of the frame are of a predefined length, and if not much data transmission capacity is needed, bandwidth is unnecessarily wasted in long time slots.
BRIEF DESCRIPTION OF INVENTION
The object of the present invention is to provide a data transmission method and system in which a bandwidth assigned to the system can be divided according to the need flexibly and more effectively than before. Another object of the invention is to allow effective use of many-sided data transmission services in radio systems without that bandwidth is wasted.
The object is achieved by a method as described in the introduction, the method being characterized in that the number of time slots assigned to the different directions of transmission is varied dynamically according to the capacity needed in the different directions of transmission.
Yet another object of the invention is to provide a digital radio system which comprises at least one base station and a number of terminal equipments, and in which data between the base station and the terminal equipments is transmitted in both directions on the same frequency band in frames consisting of time slots, and in which the time slots assigned to the different directions of transmission are separated from one another in the time domain. The radio system according to the invention is characterized in that the number of time slots assigned to the different directions of transmission on each frequency band can be varied dynamically according to the capacity needed in the different directions of transmission.
The solution of the invention has several advantages. In the solution, the number of time slots is varied according to the amount of capacity needed in the different directions of transmission. Consequently, the bandwidth available can be used as effectively and flexibly as possible. Also, the solution allows the use of high data transmission capacity requiring services (e.g. video calls) in systems where the bandwidth is limited.
DESCRIPTION OF DRAWINGS In the following the invention will be described in greater detail with reference to the examples illustrated in the attached drawings, in which fig. 1 shows a radio system in which the invention can be applied, fig. 2 shows a frame of the DECT system, fig. 3a shows a solution according to the invention for dividing the frame between different directions of transmission, and fig. 3b shows a solution according to the invention in connection with the DECT system.
DESCRIPTION OF PREFERRED EMBODIMENTS
The method and receiver according to the invention can be applied in any digital radio system whatsoever where the directions of transmission are on the same frequency band and are separate from one another in the time domain. This kind of multiple access method is called a FDMA-TDD method (Frequency Division Multiple Access - Time Division Duplex). The essential parts of a structure of a typical radio system are described, by way of an example, in fig. 1. The system comprises a base station 100, and a number of usually mobile subscriber terminals 102-104 with a both-way connection 106, 108 and 110, 112 to the base station 100. Here data is transmitted 106 from the base station to e.g. terminal equipment 102 at the same frequency as from terminal equipment 102 to the base station 108, but the transmissions are not simultaneous. The terminal equipments 102-104 communicate with the other parts of the system and with the fixed network via the base station 100. An example of a system like this is the DECT system. In the following we shall describe the invention as applied in the DECT, but without limiting the invention thereto. In FDMA-TDD systems, such as the DECT, traffic between a terminal equipment and a base station is transferred in frames. Fig. 2 shows an example of a DECT frame, which structurally is a frame typically used in the FDMA-TDD systems. The overall length of the frame is tF, which in connection with the DECT is 10 ms. The frame is divided into two parts 200, 202 of an equal size, where communication in different directions of transmission 106, 108 takes place. In the case of the DECT, both halves of the frame 200, 202 comprise 12 time slots, each one of which is used in a normal situation for transmitting one signal. Time slots 1 and 13, for example, carry information of one connection in both directions. In prior art solutions there is an equal number of time slots assigned to the different directions of transmission, and the division cannot be changed. In the DECT, for example, there are 12 time slots per each direction of transmission. In the solution of the invention, the number of time slots assigned to the different directions of transmission can be changed dynamically according to the need. Fig. 3a shows an example of a solution according to the invention for dividing a frame between the different directions of transmission. The overall length of the frame is tF, the number of time slots is n, and the frame is further divided into two parts 300, 302, which are used for transmitting traffic in the different directions of transmission 106, 108. In the solution of the invention, the number of time slots assigned to the different directions of transmission is varied dynamically. The size of parts 300, 302 is thus adjusted according to the need. In the example of fig. 3a, part 300 comprises k time slots 0...k-1 , and part 302 comprises n-k time slots k...n-1. When an equal number of time slots are assigned to both directions of transmission, then k=n/2. In a preferred embodiment of the invention, the number of time slots can be varied with the capacity needed in the different directions of transmission. The base station monitors the capacity needed in the different directions of transmission and, if necessary, changes the number of time slots assigned to the different directions of transmission. The base station naturally has to signal the current division of the frame structure to the terminal equipments.
The invention can also be applied in situations where more than one time slot is assigned to a connection between two transceivers. Since the different directions of transmission are assigned a different number of time slots, the number of time slots assigned for a connection in the different directions of transmission can be defined to be different according to the data transmission capacity needed.
Let us now examine a solution of the invention as applied in the DECT system. Fig. 3b shows an example of a DECT frame, where the number of time slots is n=24. In a prior art solution, there are 12 time slots in both directions, whereas in the solution of the invention the number can be adjusted. In the example of fig. 3b, time slots 0...8 - i.e. 9 time slots - are assigned to one direction of transmission 304, and time slots 9...23 - i.e. 15 time slots - to the other direction of transmission 306.
Let us then turn to fig. 1 , which shows a structure of a radio system according to the invention. In a solution of the invention, the radio system comprises at least one base station 100 and a number of terminal equipments 102-104. Data between the base station and the terminal equipments is transmitted in both directions 106, 108 on the same frequency band in frames comprising time slots. Time slots 300, 302 assigned to the different directions of transmission are separated from one another in the time domain. The number of time slots 300, 302 assigned to the different directions of transmission on each frequency band can be varied dynamically. In a preferred embodiment, the frame structure can be adjusted at the base station 100. Although the invention is described above with reference to an example illustrated in the attached drawings, it is to be understood that the invention is not limited thereto but can be varied in many ways within the scope of the inventive idea presented in the attached claims.

Claims

1. A data transmission method in a digital radio system where data between two transceivers is transmitted in both directions on the same frequency band in frames consisting of time slots, and where time slots assigned to different directions of transmission (300, 302) are separated from one another in the time domain, characterized in that the number of time slots (300, 302) assigned to the different directions of transmission is varied dynamically according to the capacity needed in the different directions of transmission.
2. A method according to claim 1, characterized in that the radio system comprises one or more base stations (100) and a number of terminal equipments (102-104), and that the number of time slots is adjusted at the base station (100).
3. A method according to claim 1, characterized in that the time slots assigned to a particular direction of transmission are successive.
4. A method according to claim 1, characterized in that more than one time slot is assigned for a connection between two transceivers.
5. A method according to claim 4, characterized in that the numbers of time slots assigned for a connection in the different directions of transmission are not equal.
6. A digital radio system comprising at least one base station (100) and a number of terminal equipments (102-104), data between the base station and the terminal equipments being transmitted in both directions (106, 108) on the same frequency band in frames consisting of time slots, and time slots (300, 302) assigned to the different directions of transmission being separated from one another in the time domain, characterized in that the number of time slots (300, 302) assigned to the different directions of transmission on each frequency band can be varied dynamically according to the capacity needed in the different directions of transmission.
7. A radio system according to claim 6, characterized in that more than one time slot is assigned for a connection between a base station (100) and a terminal equipment (102-104) of the system.
8. A radio system according to claim 7, characterized in that the numbers of time slots assigned for a connection in the different directions of transmission are not equal.
PCT/FI1997/000524 1996-09-06 1997-09-05 Data transmission method, and radio system WO1998010540A2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AU42105/97A AU723996B2 (en) 1996-09-06 1997-09-05 Data transmission method, and radio system
JP10512290A JP2000517503A (en) 1996-09-06 1997-09-05 Data transmission method and wireless system
EP97940174A EP0923820A2 (en) 1996-09-06 1997-09-05 Data transmission method, and radio system
NO991095A NO991095L (en) 1996-09-06 1999-03-05 Method of transmitting data, as well as radio system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI963518A FI963518A (en) 1996-09-06 1996-09-06 Communication method and radio system
FI963518 1996-09-06

Publications (2)

Publication Number Publication Date
WO1998010540A2 true WO1998010540A2 (en) 1998-03-12
WO1998010540A3 WO1998010540A3 (en) 1998-05-14

Family

ID=8546616

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI1997/000524 WO1998010540A2 (en) 1996-09-06 1997-09-05 Data transmission method, and radio system

Country Status (7)

Country Link
EP (1) EP0923820A2 (en)
JP (1) JP2000517503A (en)
CN (1) CN1187916C (en)
AU (1) AU723996B2 (en)
FI (1) FI963518A (en)
NO (1) NO991095L (en)
WO (1) WO1998010540A2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001042623A1 (en) * 1999-12-08 2001-06-14 Schlumberger Limited Telemetry system for borehole logging tools
DE10053352A1 (en) * 2000-10-27 2002-05-08 Alcatel Sa Procedure for allocating resources
CN1832378B (en) * 2005-03-11 2011-05-11 大唐移动通信设备有限公司 Method for radio transmission using high-efficient high performance frame structure for wide-band TDD system
US9787419B2 (en) 2011-06-28 2017-10-10 Lg Electronics Inc. Method and apparatus for communication in TDD system

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100375432C (en) * 2003-07-21 2008-03-12 中兴通讯股份有限公司 An apparatus and method for implementing data dynamic alignment bandwidth in transmission equipment
US8134933B2 (en) * 2007-09-04 2012-03-13 Telefonaktiebolaget Lm Ericsson (Publ) Quality channel reporting in a time division system
US20120113875A1 (en) * 2009-01-27 2012-05-10 Nokia Corporation Method and apparatus for dynamically modifying a transmission frame

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990008436A1 (en) * 1989-01-23 1990-07-26 Motorola, Inc. Spectrally efficient tdm duplex communication system
EP0407367A2 (en) * 1989-07-07 1991-01-09 Telefonaktiebolaget L M Ericsson Method and arrangement for dynamically allocating time slots to connections in a digital mobile radio system
US5239545A (en) * 1990-11-05 1993-08-24 Motorola, Inc. Channel access control in a communication system
US5323395A (en) * 1991-12-18 1994-06-21 Alcatel N.V. Method and system for sending data over a transmission link in variable length blocks in asynchronous transfer mode
WO1995032566A1 (en) * 1994-05-20 1995-11-30 Motorola Inc. A method of dynamically allocating time slots on a packet data communications channel
WO1996010875A1 (en) * 1994-09-30 1996-04-11 Motorola Inc. Method for dynamically allocating wireless communication resources
EP0726661A2 (en) * 1995-01-31 1996-08-14 NEC Corporation A method of time-slot allocation in a TDMA communication system

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990008436A1 (en) * 1989-01-23 1990-07-26 Motorola, Inc. Spectrally efficient tdm duplex communication system
EP0407367A2 (en) * 1989-07-07 1991-01-09 Telefonaktiebolaget L M Ericsson Method and arrangement for dynamically allocating time slots to connections in a digital mobile radio system
US5239545A (en) * 1990-11-05 1993-08-24 Motorola, Inc. Channel access control in a communication system
US5323395A (en) * 1991-12-18 1994-06-21 Alcatel N.V. Method and system for sending data over a transmission link in variable length blocks in asynchronous transfer mode
WO1995032566A1 (en) * 1994-05-20 1995-11-30 Motorola Inc. A method of dynamically allocating time slots on a packet data communications channel
WO1996010875A1 (en) * 1994-09-30 1996-04-11 Motorola Inc. Method for dynamically allocating wireless communication resources
EP0726661A2 (en) * 1995-01-31 1996-08-14 NEC Corporation A method of time-slot allocation in a TDMA communication system

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001042623A1 (en) * 1999-12-08 2001-06-14 Schlumberger Limited Telemetry system for borehole logging tools
GB2374365A (en) * 1999-12-08 2002-10-16 Schlumberger Holdings Telemetry system for borehole logging tools
US6552665B1 (en) 1999-12-08 2003-04-22 Schlumberger Technology Corporation Telemetry system for borehole logging tools
GB2374365B (en) * 1999-12-08 2003-07-09 Schlumberger Holdings Telemetry system for borehole logging tools
DE10053352A1 (en) * 2000-10-27 2002-05-08 Alcatel Sa Procedure for allocating resources
CN1832378B (en) * 2005-03-11 2011-05-11 大唐移动通信设备有限公司 Method for radio transmission using high-efficient high performance frame structure for wide-band TDD system
US9787419B2 (en) 2011-06-28 2017-10-10 Lg Electronics Inc. Method and apparatus for communication in TDD system

Also Published As

Publication number Publication date
NO991095D0 (en) 1999-03-05
AU723996B2 (en) 2000-09-07
NO991095L (en) 1999-03-05
FI963518A (en) 1998-03-07
FI963518A0 (en) 1996-09-06
CN1187916C (en) 2005-02-02
EP0923820A2 (en) 1999-06-23
AU4210597A (en) 1998-03-26
CN1229547A (en) 1999-09-22
JP2000517503A (en) 2000-12-26
WO1998010540A3 (en) 1998-05-14

Similar Documents

Publication Publication Date Title
US5822678A (en) CATV network for transport of radio frequency signals
US5719859A (en) Time division multiple access radio communication system
EP0571104B1 (en) Data transmission in a cellular telephone system
RU2225081C2 (en) Method and device for synchronous and asynchronous data generation
EP1555771B1 (en) Method and means for allocating time slots in a TDD system
EP0782364A3 (en) Method and apparatus for the dynamic allocation of signal bandwidth between audio, video and data signals
US20020133589A1 (en) Dynamic bandwidth negotiation scheme for wireless computer networks
EP0700225A2 (en) Wireless channel setup using low bandwidth network for selecting high bandwidth data bearer channel of another network system for data transmission
US5517681A (en) Method for preventing superimposition of traffic time slots in a radio system having a plurality of transmitting stations
EP0654916A2 (en) A method of multiple access
SE9702146D0 (en) Systems at telecommunication networks
KR19990058978A (en) Inter-frequency Handoff Control Using Multiple Codes in Code Division Multiple Access Cellular Systems
KR19990064312A (en) Apparatus and method for measuring signal strength in a wireless communication system
WO1998010556A3 (en) Improvements in, or relating to, multi-carrier transmission systems
GB2138652A (en) Distributed PABX
AU723996B2 (en) Data transmission method, and radio system
JP2000350252A (en) Service channel assignment method
JP3480761B2 (en) Wireless communication method
EP0990362B1 (en) Channel allocation for a communications system
EP1073217A2 (en) Time slot assignment method
JPH0728441B2 (en) Mobile communication switching system
KR20000057118A (en) Transmission control without limitation by the number of users
JP3337051B2 (en) Inter-station transmission path configuration method for digital mobile communication system
JP3189204B2 (en) Channel configuration method of inter-station transmission line in mobile communication system
JP2907161B2 (en) Transmission power control device

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 97197705.4

Country of ref document: CN

AK Designated states

Kind code of ref document: A2

Designated state(s): AL AM AT AU AZ BA BB BG BR BY CA CH CN CU CZ DE DK EE ES FI GB GE GH HU ID IL IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT UA UG US UZ VN YU ZW AM AZ BY KG KZ MD RU TJ TM

AL Designated countries for regional patents

Kind code of ref document: A2

Designated state(s): GH KE LS MW SD SZ UG ZW AT BE CH DE DK ES FI FR GB GR IE IT LU MC

AK Designated states

Kind code of ref document: A3

Designated state(s): AL AM AT AU AZ BA BB BG BR BY CA CH CN CU CZ DE DK EE ES FI GB GE GH HU ID IL IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT UA UG US UZ VN YU ZW AM AZ BY KG KZ MD RU TJ TM

AL Designated countries for regional patents

Kind code of ref document: A3

Designated state(s): GH KE LS MW SD SZ UG ZW AT BE CH DE DK ES FI FR GB GR IE IT LU MC

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
WWE Wipo information: entry into national phase

Ref document number: 09230496

Country of ref document: US

ENP Entry into the national phase in:

Ref document number: 1998 512290

Country of ref document: JP

Kind code of ref document: A

WWE Wipo information: entry into national phase

Ref document number: 1997940174

Country of ref document: EP

WWP Wipo information: published in national office

Ref document number: 1997940174

Country of ref document: EP

REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

NENP Non-entry into the national phase in:

Ref country code: CA

WWW Wipo information: withdrawn in national office

Ref document number: 1997940174

Country of ref document: EP