CN1187916C - Data transmission method, and radio system - Google Patents
Data transmission method, and radio system Download PDFInfo
- Publication number
- CN1187916C CN1187916C CNB971977054A CN97197705A CN1187916C CN 1187916 C CN1187916 C CN 1187916C CN B971977054 A CNB971977054 A CN B971977054A CN 97197705 A CN97197705 A CN 97197705A CN 1187916 C CN1187916 C CN 1187916C
- Authority
- CN
- China
- Prior art keywords
- time slot
- transmission
- base station
- directions
- frame
- 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.)
- Expired - Fee Related
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Classifications
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- 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
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- 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
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- 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
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Mobile Radio Communication Systems (AREA)
- Time-Division Multiplex Systems (AREA)
- Radar Systems Or Details Thereof (AREA)
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
The present invention relates to the data transmission method in the digital radio system, wherein the data between two transceivers are with form transmitted in both directions on identical frequency band of the frame be made up of time slot, and the time slot of distributing to different transmission directions is separated from each other on time domain.
In existing mobile system, in two transmission directions, distribute the transmission capacity that equates for the user.For the voice transfer of routine, this is no problem.Yet when needing to introduce new data transport service, use transmission capacity just very important more neatly.In some data transport service, for example only needing the short query requests of a spot of capacity is one-way transmission.In another direction, the data of request are transferred to the user, therefore need more capacity.Because bandwidth is limited with regard to greatest requirements, thereby has wasted bandwidth.
Existing solution for the problems referred to above is to constitute a data transmission frames that comprises the time slot with different length.For the user of the more transmission capacity of needs distributes long time slot in two transmission directions, and be to need the user of less transmission capacity in two transmission directions, to distribute the time slot of weak point.The shortcoming of this method is that the time slot of frame is a predetermined length, if do not need too many data transmission capacity, the bandwidth in the then long time slot has unnecessarily been wasted.
The purpose of this invention is to provide a kind of data transmission method and system, wherein distribute to the bandwidth of system and can carry out flexible allocation as required, more effective than existing system.Another object of the present invention is to allow to use efficiently several data transmission service in the wireless system and waste bandwidth not.
This purpose is to realize by the method described in the introduction, the method is characterized in that: the number that dynamically changes the time slot of distributing to different transmission directions according to capacity required in different transmission directions.
Another object of the present invention provides a kind of digital radio system, this system comprises at least one base station and a plurality of terminal equipment, wherein the data between base station and the terminal equipment are the form transmitted in both directions on identical frequency band with the frame of being made up of time slot, and the time slot of distributing to different transmission directions is separated from each other on time domain.Wireless system according to the present invention is characterised in that: the base station is configured to can dynamically change the number of the time slot of distributing to transmission directions different on each frequency band according to required capacity in the different transmission direction that connects between base station and the terminal equipment.
Technical scheme of the present invention has a plurality of advantages.In this scheme, change the number of time slot according to capacity required in different transmission directions.Therefore available bandwidth can be as far as possible efficiently and is used available bandwidth neatly.And this scheme allows the high data transmission capacity of instructions for use service in the system of limited bandwidth (being video call).
With reference to embodiment and accompanying drawing the present invention is described in more detail below.
Fig. 1 can use wireless system of the present invention.
Fig. 2 is a frame of DECT system.
Fig. 3 a is according to technical scheme of the present invention, is used for distributing frame between different transmission directions.
Fig. 3 b is relevant with the DECT system according to technical scheme of the present invention.
The method according to this invention and receiver can be applied to any each transmission direction on the identical frequency band and the digital radio system that is separated from each other on time domain.This multi-address method is called FDMA-TDD method (frequency division multiple access-time division multiplexing).The critical piece of a typical wireless system arrangements is described below by Fig. 1.This system comprises a base station 100, a plurality ofly is connected to the mobile subscriber terminal 102-104 of base station by two-way connection 106,108 and 110,112.The frequency from base station transmits to for example terminal equipment 102 is identical with the frequency that is transferred to base station 108 from terminal equipment 102 by two-way connection 106 for data herein, but not transmission simultaneously.Terminal equipment 102-104 is by other parts and the fixed network communication of base station 100 with system.An example of system like this is the DECT system.Below we will describe the application of the present invention in DECT, note being not limited to the present invention here.
In the such FDMA-TDD system of DECT, between terminal equipment and the base station by frame transmission information.Fig. 2 shows the example of a DECT frame, and it is a typical frame that is applied to the FDMA-TDD system.The length overall of this frame is t
F, be 10ms with regard to DECT.This frame is split into isometric two parts 200,202, for communicating in different transmission direction 106,108.Under the DECT situation, two parts 200 and 202 of frame respectively comprise 12 time slots, and each in them is used to transmit a signal under normal condition.For example time slot 1 and 13 is used to carry information that is connected on the both direction.
In the technical scheme of prior art, be the time slot of different transmission direction distribution similar numbers, and this distribution can not be changed.In DECT, for example, 12 time slots are arranged in each transmission direction.In technical scheme of the present invention, as required, the number of time slot of distributing to different transmission directions can dynamically change.Fig. 3 a is technical scheme according to the present invention is distributed a frame between different transmission directions a example.The length overall of frame is t
F, the number of time slot is n, and this frame further is split into two parts 300 and 302, is used for uploading transmission information in different transmission direction 106 and 108.
In technical scheme of the present invention, the number of distributing to the time slot in the different transmission directions is dynamically to change.Two parts 300 and 302 size are adjusted as required.In the example shown in Fig. 3 a, 300 parts comprise k time slot 0...k-1, and 302 parts comprise n-k time slot k...n-1.When two transmission directions distribute the timeslot number that equates, k=n/2.In a preferred embodiment of the invention, the number of time slot can change according to capacity required in different transmission directions.Base station monitoring required capacity in different transmission directions, and change the number of time slot of distributing to different transmission directions when needed.Certainly, the base station must be notified to each terminal equipment to current frame distribution structure.
The present invention also is used to the situation of two connections distribution between the transceiver more than a time slot.Because different transmission directions has distributed the time slot of different numbers,, be allocated for the number of time slot that carries out the connection in different transmission directions and can be defined as inequality therefore according to required data transmission capacity.
It is continuous that the present invention also is used to two certain transmission direction distributed time slot between the transceiver.
Let us is checked the application of technical scheme of the present invention in the DECT system now.Fig. 3 b is an example of DECT frame, and wherein timeslot number is n=24.In the scheme of prior art, 12 time slots are respectively arranged, and this number is adjustable in technical scheme of the present invention on both direction.In the example of Fig. 3 b, time slot 0...8, promptly 9 time slots are assigned to a transmission direction 304, time slot 9...23, promptly 15 time slots are assigned to another transmission direction 306.
Back with reference to Fig. 1 that the structure of wireless system of the present invention is shown, wireless system comprises at least one base station 100 and a plurality of terminal equipment 102-104 in technical scheme of the present invention now.Data between base station and the terminal equipment are to transmit on both direction 106,108 on the identical frequency band with the form of the frame of being made up of time slot, and the time slot 300,302 of distributing to different transmission directions is separated from each other on time domain.Can dynamically change the number of the time slot 300,302 of distributing to transmission directions different on each frequency band.In a preferred embodiment, can adjust frame structure in 100 places in the base station.
Although the embodiment of explanation has described the present invention with reference to the accompanying drawings above, should be appreciated that the present invention is not limited to this, can carry out various changes to it under the situation of the scope of the inventive concept that in not exceeding appended claim, provides.
Claims (3)
1. the data transmission method in the digital radio system, this method comprises:
-on same frequency range, with the form of the frame that constitutes by a plurality of time slots, between a base station transceiver and a plurality of terminal transceiver at the first and second transmission direction transmitting datas;
-on time domain, the time slot of distributing to first and second transmission directions is separated;
-by base station monitoring required capacity in first and second transmission directions;
-according to described supervision each time slot of described frame is dynamically distributed to first or second transmission direction; And
-be that between a base station transceiver and the terminal transceiver one connects and distributes at least one time slot to give first and second transmission directions.
2. according to the method for claim 1, it is characterized in that the time slot of distributing to certain transmission direction is continuous.
3. according to the method for claim 4, it is characterized in that to connect institute's distributed time slot number unequal for one in the different transmission directions.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI963518 | 1996-09-06 | ||
| FI963518A FI963518A (en) | 1996-09-06 | 1996-09-06 | Communication method and radio system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1229547A CN1229547A (en) | 1999-09-22 |
| CN1187916C true CN1187916C (en) | 2005-02-02 |
Family
ID=8546616
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB971977054A Expired - Fee Related CN1187916C (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) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6552665B1 (en) * | 1999-12-08 | 2003-04-22 | Schlumberger Technology Corporation | Telemetry system for borehole logging tools |
| DE10053352A1 (en) * | 2000-10-27 | 2002-05-08 | Alcatel Sa | Procedure for allocating resources |
| 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 |
| 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 |
| WO2009031954A1 (en) * | 2007-09-04 | 2009-03-12 | Telefonaktiebolaget Lm Ericsson (Publ) | Improved quality channel reporting in a time division system |
| WO2010086498A1 (en) * | 2009-01-27 | 2010-08-05 | Nokia Corporation | Method and apparatus for dynamically modifying a transmission frame |
| CN103650373B (en) * | 2011-06-28 | 2017-08-04 | Lg电子株式会社 | The method and apparatus communicated in tdd systems |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5001703A (en) * | 1989-01-23 | 1991-03-19 | Motorola, Inc. | Spectrally efficient TDM duplex communication system |
| US4949395A (en) * | 1989-07-07 | 1990-08-14 | 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 |
| FR2685592B1 (en) * | 1991-12-18 | 1994-03-18 | Alcatel Nv | METHOD AND SYSTEM FOR TRANSMITTING INFORMATION ON A VARIABLE LENGTH DATA BLOCK TRANSMISSION LINK IN ASYNCHRONOUS TIME MULTIPLEXING. |
| US5535207A (en) * | 1994-05-20 | 1996-07-09 | Motorola, Inc. | Method of dynamically allocating time slots on a packet data communications channel |
| US5583869A (en) * | 1994-09-30 | 1996-12-10 | Motorola, Inc. | Method for dynamically allocating wireless communication resources |
| JP3014023B2 (en) * | 1995-01-31 | 2000-02-28 | 日本電気株式会社 | Time slot allocation method in TDMA communication system |
-
1996
- 1996-09-06 FI FI963518A patent/FI963518A/en unknown
-
1997
- 1997-09-05 EP EP97940174A patent/EP0923820A2/en not_active Withdrawn
- 1997-09-05 CN CNB971977054A patent/CN1187916C/en not_active Expired - Fee Related
- 1997-09-05 AU AU42105/97A patent/AU723996B2/en not_active Ceased
- 1997-09-05 WO PCT/FI1997/000524 patent/WO1998010540A2/en not_active Application Discontinuation
- 1997-09-05 JP JP10512290A patent/JP2000517503A/en not_active Ceased
-
1999
- 1999-03-05 NO NO991095A patent/NO991095L/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| JP2000517503A (en) | 2000-12-26 |
| WO1998010540A2 (en) | 1998-03-12 |
| CN1229547A (en) | 1999-09-22 |
| EP0923820A2 (en) | 1999-06-23 |
| WO1998010540A3 (en) | 1998-05-14 |
| NO991095D0 (en) | 1999-03-05 |
| NO991095L (en) | 1999-03-05 |
| FI963518A0 (en) | 1996-09-06 |
| AU723996B2 (en) | 2000-09-07 |
| FI963518A (en) | 1998-03-07 |
| AU4210597A (en) | 1998-03-26 |
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