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CN1229547A - Data transmission method, and radio system - Google Patents

Data transmission method, and radio system Download PDF

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Publication number
CN1229547A
CN1229547A CN97197705.4A CN97197705A CN1229547A CN 1229547 A CN1229547 A CN 1229547A CN 97197705 A CN97197705 A CN 97197705A CN 1229547 A CN1229547 A CN 1229547A
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Prior art keywords
time slot
transmission directions
different transmission
time slots
directions
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Granted
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CN97197705.4A
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CN1187916C (en
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卡瑞·霍尼曼
萨米·卓基能
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Nokia Oyj
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Nokia Telecommunications Oy
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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
    • 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

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Time-Division Multiplex Systems (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Transceivers (AREA)
  • Bidirectional Digital Transmission (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

数据传输方法和无线系统Data transmission method and wireless system

本发明涉及数字无线系统中的数据传输方法，其中两个收发机之间的数据以由时隙组成的帧的形式在同一频带上双向传输，并且分配给不同的传输方向的时隙在时域上相互分离。The present invention relates to a data transmission method in a digital wireless system, wherein data between two transceivers is transmitted bidirectionally on the same frequency band in the form of a frame consisting of time slots, and the time slots assigned to different transmission directions are in the time domain separated from each other.

在现有的移动系统中，为用户在两个传输方向上分配相等的传输容量。对于常规的语音传输来说，这是没有问题的。然而当需要引入新的数据传输服务时，更灵活地使用传输容量就十分重要。在一些数据传输服务中，例如仅需少量的容量的短查询请求是单向传输的。在另一个方向，请求的数据被传输给用户，因此需要更多的容量。由于就最大需求而言带宽是有限的，因而浪费了带宽。In existing mobile systems, users are allocated equal transmission capacity in both transmission directions. For regular voice transmission, this is no problem. However, a more flexible use of transmission capacity is important when new data transmission services need to be introduced. In some data transfer services, such as short query requests requiring only a small amount of capacity, the transfer is unidirectional. In the other direction, the requested data is transmitted to the user, thus requiring more capacity. Bandwidth is wasted since it is limited in terms of maximum demand.

对于上述问题的现有解决方案是构成一个包括具有不同长度的时隙的数据传输帧。为需要更多的传输容量的用户在两个传输方向上分配较长的时隙，而为需要较少的传输容量的用户在两个传输方向上分配较短的时隙。该方法的缺点是帧的时隙是预定长度，如果不需要太多的数据传输容量，则长时隙中的带宽被不必要地浪费了。A known solution to the above-mentioned problem is to construct a data transmission frame comprising time slots of different lengths. Users requiring more transmission capacity are allocated longer time slots in both transmission directions, while users requiring less transmission capacity are allocated shorter time slots in both transmission directions. The disadvantage of this method is that the time slots of the frame are of predetermined length, and bandwidth in long time slots is unnecessarily wasted if not much data transmission capacity is required.

本发明的目的是提供一种数据传输方法和系统，其中分配给系统的带宽可以根据需要进行灵活分配，比现有系统更有效。本发明的另一个目的是允许高效地使用无线系统中的多种数据传输服务而不浪费带宽。The purpose of the present invention is to provide a data transmission method and system, wherein the bandwidth allocated to the system can be flexibly allocated according to the needs, which is more efficient than the existing system. Another object of the present invention is to allow efficient use of various data transmission services in a wireless system without wasting bandwidth.

该目的是通过介绍中所描述的方法实现的，该方法的特征在于：根据在不同的传输方向上所需的容量动态地改变分配给不同的传输方向的时隙的数目。This object is achieved by the method described in the introduction, which is characterized in that the number of time slots assigned to the different transmission directions is changed dynamically depending on the capacity required in the different transmission directions.

本发明的另一个目的是提供一种数字无线系统，该系统包括至少一个基站和多个终端设备，其中基站和终端设备之间的数据是以由时隙组成的帧的形式在同一频带上双向传输，并且分配给不同的传输方向的时隙在时域上相互分离。根据本发明的无线系统的特征在于：根据在不同的传输方向上所需的容量，可以动态地改变分配给每个频带上不同的传输方向的时隙的数目。Another object of the present invention is to provide a digital wireless system comprising at least one base station and a plurality of terminal devices, wherein data between the base station and the terminal devices is bidirectional on the same frequency band in the form of frames consisting of time slots transmission, and the time slots allocated to different transmission directions are separated from each other in the time domain. The wireless system according to the invention is characterized in that the number of time slots allocated to the different transmission directions on each frequency band can be dynamically changed depending on the capacity required in the different transmission directions.

本发明的技术方案具有多个优点。在该方案中，根据在不同的传输方向上所需的容量改变时隙的数目。因此可用的带宽可以尽可能高效和灵活地使用可用的带宽。而且，该方案允许在带宽受限的系统中使用要求服务(即视频呼叫)的高数据传输容量。The technical solution of the present invention has multiple advantages. In this scheme, the number of time slots is varied according to the capacity required in the different transmission directions. The available bandwidth can thus be used as efficiently and flexibly as possible. Furthermore, this approach allows the use of high data transmission capacities for demanding services (ie video calls) in bandwidth-limited systems.

下面将参照实施例和附图更详细地描述本发明。The present invention will be described in more detail below with reference to examples and drawings.

图1是可应用本发明的无线系统。Figure 1 is a wireless system to which the present invention can be applied.

图2是DECT系统的一个帧。Fig. 2 is a frame of the DECT system.

图3a是根据本发明的技术方案，用于在不同的传输方向之间分配帧。Fig. 3a is a technical solution for distributing frames among different transmission directions according to the present invention.

图3b是与DECT系统相关的根据本发明的技术方案。Fig. 3b is a technical solution according to the present invention related to the DECT system.

根据本发明的方法和接收机可以应用于任何一种各传输方向在同一频带上并且在时域上相互分离的数字无线系统。这种多址方法称为FDMA-TDD方法(频分多址-时分复用)。下面通过图1描述一个典型的无线系统结构的主要部件。该系统包括一个基站100，多个通过双向连接106，108和110，112连接到基站的移动用户终端102-104，。此处数据通过双向连接106从基站传输到例如终端设备102的频率与从终端设备102传输到基站108的频率相同，但不同时传输。终端设备102-104通过基站100与系统的其它部分及固定网络通信。象这样的系统的一个例子是DECT系统。下面我们将描述本发明在DECT中的应用，注意这里并不用于限制本发明。The method and receiver according to the invention can be applied to any digital radio system in which the transmission directions are on the same frequency band and separated from each other in the time domain. This multiple access method is called the FDMA-TDD method (Frequency Division Multiple Access - Time Division Multiplexing). The main components of a typical wireless system structure are described below through FIG. 1 . The system comprises a base station 100, a plurality of mobile user terminals 102-104 connected to the base station via bidirectional connections 106,108 and 110,112. Here the data is transmitted via the bidirectional connection 106 from the base station to, for example, the terminal 102 at the same frequency as from the terminal 102 to the base station 108 , but not at the same time. Terminal devices 102-104 communicate via base station 100 with the rest of the system and the fixed network. An example of a system like this is the DECT system. Below we will describe the application of the present invention in DECT, note that it is not intended to limit the present invention.

在DECT这样的FDMA-TDD系统中，终端设备和基站之间通过帧传输信息。图2示出了一个DECT帧的实例，它是应用于FDMA-TDD系统的一个典型帧。该帧的总长为tF，就DECT而言是10ms。该帧被分割为等长的两部分200、202，以供在不同的传输方向106、108上进行通信。在DECT情况下，帧的两部分200和202各包括12个时隙，它们中的每一个在正常状态下用于传输一个信号。例如时隙1和13用于携带两个方向上一个连接的信息。In FDMA-TDD systems such as DECT, information is transmitted between terminal equipment and base stations through frames. Figure 2 shows an example of a DECT frame, which is a typical frame applied to the FDMA-TDD system. The total length of this frame is t F , which is 10 ms in the case of DECT. The frame is divided into two parts 200 , 202 of equal length for communication in the different transmission directions 106 , 108 . In the case of DECT, the two parts 200 and 202 of the frame each comprise 12 time slots, each of which is used to transmit a signal in the normal state. For example, time slots 1 and 13 are used to carry information for a connection in both directions.

在现有技术的技术方案中，为不同的传输方向分配相同数目的时隙，并且该分配不能被改变。在DECT中，例如，在每个传输方向上有12个时隙。在本发明的技术方案中，根据需要，分配给不同的传输方向的时隙数目可以动态改变。图3a是根据本发明的技术方案在不同的传输方向之间分配一个帧的例子。帧的总长为tF，时隙的个数为n，并且该帧进一步被分割为两个部分300和302，用于在不同的传输方向106和108上传输信息。In prior art solutions, the same number of time slots is allocated for different transmission directions, and this allocation cannot be changed. In DECT, for example, there are 12 time slots in each transmission direction. In the technical solution of the present invention, the number of time slots allocated to different transmission directions can be changed dynamically according to needs. Fig. 3a is an example of distributing a frame among different transmission directions according to the technical solution of the present invention. The total length of the frame is t F , the number of time slots is n, and the frame is further divided into two parts 300 and 302 for transmitting information in different transmission directions 106 and 108 .

在本发明的技术方案中，分配给不同的传输方向上的时隙的数目是动态改变的。两部分300和302的大小是根据需要进行调整的。在图3a所示的例子中，300部分包括k个时隙0...k-1，302部分包括n-k个时隙  k...n-1。当向两个传输方向分配相等的时隙数时，k＝n/2。在本发明的优选实施例中，时隙的数目可以根据在不同的传输方向上所需的容量而改变。基站监视在不同的传输方向上所需的容量，并在需要时改变分配给不同的传输方向的时隙数目。当然，基站必须把当前的帧分配结构通知给各终端设备。In the technical solution of the present invention, the number of time slots allocated to different transmission directions is dynamically changed. The sizes of the two parts 300 and 302 are adjusted as required. In the example shown in Fig. 3a, part 300 includes k time slots 0...k-1 and part 302 includes n-k time slots k...n-1. When an equal number of time slots are allocated to both transmission directions, k=n/2. In a preferred embodiment of the invention, the number of time slots can be varied according to the capacity required in the different transmission directions. The base station monitors the required capacity in the different transmission directions and changes the number of time slots allocated to the different transmission directions if necessary. Of course, the base station must notify each terminal device of the current frame allocation structure.

本发明还用于为两个收发机之间的连接分配多于一个时隙的情况。由于不同的传输方向分配了不同个数的时隙，因此根据所需的数据传输容量，被分配用于进行在不同的传输方向上的连接的时隙数目可以被定义为不相同。The invention is also used in cases where more than one time slot is allocated for a connection between two transceivers. Since different transmission directions are allocated different numbers of time slots, the number of time slots allocated for connections in different transmission directions may be defined to be different according to required data transmission capacity.

现在让我们来检验本发明的技术方案在DECT系统中的应用。图3b是DECT帧的一个例子，其中时隙数为n＝24。在现有技术的方案中，在两个方向上各有12个时隙，而在本发明的技术方案中该数目是可调的。在图3b的例子中，时隙0...8，即9个时隙，被分配给一个传输方向304，时隙9...23，即15个时隙，被分配给另一个传输方向306。Let us now examine the application of the technical solution of the present invention in the DECT system. Figure 3b is an example of a DECT frame where the number of slots is n=24. In the prior art solution, there are 12 time slots in each direction, but in the technical solution of the present invention, the number is adjustable. In the example of Fig. 3b, time slots 0...8, i.e. 9 time slots, are allocated to one transmission direction 304 and time slots 9...23, i.e. 15 time slots, are allocated to the other transmission direction 306.

现在回过来参考示出本发明的无线系统的结构的图1，在本发明的技术方案中无线系统包括至少一个基站100和多个终端设备102-104。基站和终端设备之间的数据是以由时隙组成的帧的形式在同一频带上在两个方向106、108上传输，分配给不同的传输方向的时隙300、302在时域上相互分离。可以动态地改变分配给每个频带上不同的传输方向的时隙300、302的数目。在优选实施例中，可以在基站100处调整帧结构。Referring back now to FIG. 1 showing the structure of the wireless system of the present invention, the wireless system includes at least one base station 100 and a plurality of terminal devices 102-104 in the technical solution of the present invention. The data between the base station and the terminal equipment is transmitted in two directions 106, 108 on the same frequency band in the form of a frame consisting of time slots, the time slots 300, 302 assigned to different transmission directions are separated from each other in the time domain . The number of time slots 300, 302 allocated to different transmission directions on each frequency band can be changed dynamically. In a preferred embodiment, the frame structure can be adjusted at the base station 100 .

尽管上面参考附图说明的实施例描述了本发明，应该理解本发明并不限于此，在不超出所附的权利要求中给出的本发明思想的范围的情况下可以对其进行各种改变。Although the invention has been described above with reference to the embodiments illustrated in the accompanying drawings, it should be understood that the invention is not limited thereto and various changes can be made thereto without departing from the scope of the inventive idea presented in the appended claims. .

Claims (8)

1 is used for the data transmission method of digital radio system, wherein the data between two transceivers are the form transmitted in both directions on identical frequency band with the frame of being made up of time slot, and distribute to the time slot (300 of different transmission directions, 302) on time domain, be separated from each other, it is characterized in that: according to capacity required in different transmission directions, dynamically change the number of the time slot (300,302) of distributing to different transmission directions.
2 methods according to claim 1 is characterized in that, this wireless system comprises one or more base stations (100) and a plurality of terminal equipment (102-104), and (100) adjust number of time slot in the base station.
3 methods according to claim 1 is characterized in that the time slot of distributing to certain transmission direction is continuous.
4 methods according to claim 1 is characterized in that, are that between two transceivers connects the time slot that distributes more than.
5 methods according to claim 4 is characterized in that, to connect institute's distributed time slot number unequal for one in the different transmission directions.
6 one kinds of digital radio systems, comprise at least one base station (100) and a plurality of terminal equipment (102-104), data between base station and the terminal equipment are upward to transmit at both direction (106,108) on 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, it is characterized in that:, can dynamically change the number of the time slot (300,302) of distributing to transmission directions different on each frequency band according to capacity required in different transmission directions.
7 wireless systems according to claim 6 is characterized in that, connect to distribute and outnumber one time slot for one between the base station (100) of system and the terminal equipment (102-104).
8 wireless systems according to claim 7 is characterized in that, to connect institute's distributed time slot number unequal for one in the different transmission directions.
CNB971977054A 1996-09-06 1997-09-05 data transfer method Expired - Fee Related CN1187916C (en)

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FI963518A FI963518A7 (en) 1996-09-06 1996-09-06 Communication method and radio system

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CN1187916C CN1187916C (en) 2005-02-02

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WO2006094442A1 (en) * 2005-03-11 2006-09-14 Datang Mobile Communications Equipment Co., Ltd A wireless transmission method of using efficient high performance frame structure in wideband tdd system
CN100375432C (en) * 2003-07-21 2008-03-12 中兴通讯股份有限公司 A device and method for dynamically adjusting data service bandwidth in transmission equipment
CN101796756A (en) * 2007-09-04 2010-08-04 爱立信电话股份有限公司 Improved Quality Channel Reporting in Time Division Systems
CN102349347A (en) * 2009-01-27 2012-02-08 诺基亚公司 Method and apparatus for dynamically modifying a transmission frame
CN103650373A (en) * 2011-06-28 2014-03-19 Lg电子株式会社 Method and apparatus for communication in TDD system

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CN100375432C (en) * 2003-07-21 2008-03-12 中兴通讯股份有限公司 A device and method for dynamically adjusting data service bandwidth in transmission equipment
WO2006094442A1 (en) * 2005-03-11 2006-09-14 Datang Mobile Communications Equipment Co., Ltd A wireless transmission method of using efficient high performance frame structure in wideband tdd system
US8018879B2 (en) 2005-03-11 2011-09-13 China Academy Of Telecommunications Technology Wireless transmission method of using efficient high performance frame structure in wideband TDD system
CN101796756A (en) * 2007-09-04 2010-08-04 爱立信电话股份有限公司 Improved Quality Channel Reporting in Time Division Systems
CN102349347A (en) * 2009-01-27 2012-02-08 诺基亚公司 Method and apparatus for dynamically modifying a transmission frame
CN102349347B (en) * 2009-01-27 2014-12-24 诺基亚公司 Method and apparatus for dynamically modifying a transmission frame
CN103650373A (en) * 2011-06-28 2014-03-19 Lg电子株式会社 Method and apparatus for communication in TDD system
CN103650373B (en) * 2011-06-28 2017-08-04 Lg电子株式会社 Method and device for communication in time division duplex system
US9787419B2 (en) 2011-06-28 2017-10-10 Lg Electronics Inc. Method and apparatus for communication in TDD system

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WO1998010540A3 (en) 1998-05-14
FI963518A0 (en) 1996-09-06
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AU4210597A (en) 1998-03-26
NO991095L (en) 1999-03-05
CN1187916C (en) 2005-02-02
NO991095D0 (en) 1999-03-05
JP2000517503A (en) 2000-12-26
EP0923820A2 (en) 1999-06-23
WO1998010540A2 (en) 1998-03-12
FI963518A7 (en) 1998-03-07

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