WO1999022544A1 - Verfahren und mobil-kommunikationssystem zur übertragung von informationen über eine funkschnittstelle - Google Patents
Verfahren und mobil-kommunikationssystem zur übertragung von informationen über eine funkschnittstelle Download PDFInfo
- Publication number
- WO1999022544A1 WO1999022544A1 PCT/DE1998/002475 DE9802475W WO9922544A1 WO 1999022544 A1 WO1999022544 A1 WO 1999022544A1 DE 9802475 W DE9802475 W DE 9802475W WO 9922544 A1 WO9922544 A1 WO 9922544A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- information
- transmission
- connections
- üks
- transmission channel
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J7/00—Multiplex systems in which the amplitudes or durations of the signals in individual channels are characteristic of those channels
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
- H04W48/12—Access restriction or access information delivery, e.g. discovery data delivery using downlink control channel
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0212—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave
- H04W52/0216—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave using a pre-established activity schedule, e.g. traffic indication frame
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Definitions
- the invention relates to a method for transmitting information via a radio interface in a mobile communication system, which provides transmission channels in which useful information of several connections between mobile stations and a base station is contained at the same time and can be distinguished according to a connection-specific fine structure, and a corresponding mobile network. Communication system.
- the known mobile radio system according to the GSM standard is a mobile communication system with a TDMA component as a multiple access method (time division multiple access) for subscriber separation.
- TDMA frame information from several subscriber connections is transmitted in time slots.
- the information is transmitted block by block in radio blocks (bursts).
- transmission channels for useful information such as voice, data or signaling -
- transmission channels for organizational information such as information on the location area, the radio cell, the channel structure and options that are supported within the cell.
- the transmission channels for useful information such as voice, data or signaling -
- organizational information such as information on the location area, the radio cell, the channel structure and options that are supported within the cell.
- User information relates to connections between the mobile stations and a base station (point-to-point connections gen) in the downlink (downlink) as in the uplink (uplink).
- the transmission channels e.g. BCCH, broadcast control channel; FCCH, frequency correction channel; SCH, synchronization channel
- BCCH broadcast control channel
- FCCH frequency correction channel
- SCH synchronization channel
- Multiple access methods are provided for subscriber separation in a time slot.
- the useful information of a plurality of connections contained in the time slot designed as a transmission channel can be distinguished by spreading codes.
- the data rate of the organizational information is significantly lower than the data rate of the useful information.
- the base station is connected to an antenna device, which consists of a number of individual radiators, each of which radiates in a sector of the radio cell supplied by the base station (principle of the adaptive antennas).
- the useful information and organizational information are emitted with approximately the same output.
- the invention is based on the object of specifying a method and a mobile communication system of the type specified above, by means of which economical information transmission can also be achieved for organizational information on point-to-multipoint connections.
- This object is achieved by the method having the features of patent claim 1 and the mobile communication system features by patent claim 10.
- Advantageous further developments can be found in the subclaims.
- the method according to the invention for a mobile communication system provides for the transmission of organizational information from the base station to several mobile stations, a transmission channel in which the number of connections with the user information contained at the same time and distinguishable according to a connection-specific fine structure Compared to the maximum number of transferable connections is reduced.
- the organizational information is inserted into this transmission channel, and the organizational information is transmitted therein with a transmission power that is increased in comparison to the respective transmission powers for the connections with the useful information.
- the inventive combination of the reservation of a specific transmission channel for the organizational information with the reduction in the number of connections compared to the maximum number of transmissible connections enables the transmission power for the organizational information to be increased accordingly.
- the advantage lies in an increase in capacity due to a higher number of connections or mobile stations that can be supplied with organization information at the same time while maintaining the same bandwidth on the radio interface. The result is an efficient and economical information transmission with regard to the organizational information that should be made available to as many mobile stations as possible in the radio cell managed by the base station.
- the radio resources are used well both for the useful information and for the organizational information transmission.
- the organizational information is also available when using adaptive antennas for radiation - with the advantages specified above. Power fluctuations or increases beyond the total transmission power of a transmission channel, which is to be limited by the interference of other subscriber signals, are excluded by the invention.
- the organizational information is advantageously transmitted in one of the transmission channels formed by time slots of a TDMA component or - additionally or alternatively - in one of the transmission channels formed by frequency channels of an FDMA component.
- the mobile communication system has a CDMA component with individual spreading codes as a connection-specific fine structure for distinguishing the useful information of several connections.
- the user information is thus transmitted over a broad band, for example in a 1.6 or 2.0 MHz frequency band.
- At least two of these organizational information items are combined in the selected transmission channel in order to transmit various organizational information items.
- a temporal multiplexing of various organizational information is preferably also carried out in the selected transmission channel, which simplifies the control of the information transmission on the point-to-multipoint connections.
- the greater process gain for the organizational information is advantageously achieved in that the total transmission power of the selected transmission channel with the organization information is set to be less than or equal to the total transmission power of a transmission channel without the organization information.
- the separate treatment of useful information and organizational information is particularly advantageous if directional radiation (e.g. by adaptive antennas) for the useful information is possible with an antenna device assigned to the base station.
- the organizational information is radiated omnidirectionally, but nevertheless with an antenna gain by the invention.
- the directivity of the adaptive antennas enables greater ranges to be achieved for the useful information.
- the mobile communication system for transmitting information via a radio interface has: a signal processing device for providing organizational information for the simultaneous transmission from the base station to a plurality of mobile stations, a control device for selecting a transmission channel for the transmission of the organizational information and to reduce the number of connections with useful information compared to the maximum number of transmissible connections in this selected transmission channel, and a transmission device for setting a transmission power for the organizational information in the selected transmission channel, which in comparison to the respective Transmission power for the connections with the user information is increased.
- 1 shows the block diagram of a mobile communication system
- FIG. 3 shows the block diagram of a base station controller and a base station
- FIG. 4 shows the block diagram of a mobile station.
- the structure of the mobile communication system shown in FIG. 1 corresponds to a known GSM mobile radio network which has a plurality of mobile switching centers MSC, base station controls BSC, base stations BS and mobile stations MS and at least one operation and maintenance center OMC.
- the mobile switching centers MSC are networked with one another or provide access to another communication network, for example a fixed network PSTN.
- these mobile switching centers MSC are each connected to at least one base station controller BSC.
- Each base station controller BSC in turn enables a connection to at least one base station BS.
- a base station is BS
- PJ ⁇ ⁇ - ⁇ tn rt J d PJ d ⁇ dd ⁇ ⁇ ⁇ - tö ⁇ ⁇ ⁇ d ⁇ - d ⁇ - a ⁇ ⁇ rt PJ J d ⁇ PJ a tr d tr ⁇ d rt J rt JN tr tr aaaadad tn OP ⁇ iQ d tn ⁇ ddd tr d Pi ⁇
- ⁇ a ⁇ - rt ad & ⁇ IQ P IQ ⁇ d N tn ⁇ - ⁇ rt ⁇ ⁇ - ⁇ d ⁇ o cn «Z tr tQ a ⁇ d ⁇ - ⁇ ⁇ tr ⁇ a ⁇ ⁇ ad IQ ⁇ d rt d rr d ⁇ - d ⁇ - PJ rt tr H rr 0 ⁇ ⁇ d
- the transmission channel in which the organizational information oi is transmitted should not be exceeded.
- the radio interface has a time division multiplex (TDMA) or frequency division multiplex (FDMA) component and a code division multiplex component (CDMA).
- TDMA time division multiplex
- FDMA frequency division multiplex
- CDMA code division multiplex component
- TDMA and CDMA component to a TDMA / CDMA mobile radio communication system described, but is also applicable to any combination of the above multiple access methods.
- Several frequency bands - which are not shown in detail in FIG. 2 - can be provided for the mobile radio communication system.
- the TDMA component comprises a time axis t, which is divided into a time grid consisting of, for example, eight time slots ts1, ts2 ... per time frame in such a way that the information is transmitted in radio blocks (bursts).
- the FDMA component comprises a frequency axis f with a frequency grid, consisting of several frequency channels FK1, FK2 ....
- the time slots or frequency channels form the transmission channels in which the useful information of several connections between the mobile stations and the base station are contained at the same time.
- the useful information ni contained in a transmission channel ÜK formed by the time slot t2 can be distinguished per radio block with the aid of spreading codes c1 to c8 according to the CDMA component on the code axis c.
- the spreading codes c1 to c8 form a connection-specific fine structure with which, in the present example, a maximum of eight parallel subscriber signals from the mobile stations can be transmitted simultaneously.
- a uniform spreading method is preferably used for the data, speech and signaling signals forming the useful information.
- a power control is carried out on the connections, which is dependent on the individual received powers measured and signaled at the respective mobile station and the base station BS.
- the total transmission power per time slot for emitting the information is constant.
- a transmission channel ÜKS is provided or selected in the system, which in the present example is the time slot tsl - or alternatively the frequency channel FKl.
- the transmission channel ÜKS with the organizational information oi is preferably always in the first time slot of a TDMA frame or a multi-frame.
- the number of connections with the user information ni is reduced compared to the maximum number of transmissible connections, in the present example from a total of eight connections to six connections.
- the useful information ni of the remaining six connections can be distinguished from one another by the spreading codes cl to c6.
- the usually available useful information of the two other connections is at least partially or completely replaced by the organizational information oi and entered in the selected transmission channel ÜKS.
- the ÜKS transmission channel only serves to transmit organizational information oi, useful information is no longer included.
- the advantage lies in an increase in capacity due to a higher number of connections or mobile stations that can be supplied with organizational information at the same time and with the same bandwidth on the radio interface.
- the result is an efficient and economical transmission of information in relation to the organizational information which should be made available to as many mobile stations as possible in the radio cell serviced by the base station.
- the radio resources are used well both for the useful information as well as for the organizational information transmission.
- the spreading of the data d - language, data or signaling - of the useful information ni and the spreading of the data oia, oib, oid of the organizational information oi is carried out as shown in FIG. 2.
- the data oia, oib, oid identify various organizational information, which are provided, for example, by different control channels (see FIG. 1 above). These can be combined - preferably time-multiplexed - in a single instead of several selected transmission channels ÜKS.
- the spreading of each data symbol d is carried out using one of the spreading codes cl to c6, the spreading factor, defined by the number of chips per data symbol, being denoted by Ql to Q6.
- the spreading factor Q1 of the first subscriber signal is, for example, three.
- the spreading code cl is repeated from data symbol d to data symbol d.
- the spreading of the data oia, oib, oid of the organizational information oi can be carried out using a DS-CDMA method (direct sequence), the symbol duration of one of these data symbols being greater than that of the data d of the useful information ni, for example.
- the DS spreading code is a continuous spreading code - designated Q7 and Q8 - that is larger than that )) tt HH in o in o in O in
- ⁇ ⁇ ⁇ ⁇ - ⁇ - PJ rt ⁇ - tr a ⁇ iQ ⁇ H co ⁇ ⁇ ⁇ - d ⁇ - ⁇ ! ⁇ - ⁇ d J> 0 d J ⁇ - cn ⁇ tr
- ⁇ ⁇ iQ PJ ⁇ - CH d IQ ⁇ 1 H a tr ao P rt cn 3 ⁇ a cn d ⁇ ⁇ - ⁇ rt rt 3 d rt a 3 rt ⁇ d ö ( Q • ⁇ _ O o X co Hi ⁇ - tr ⁇ tsi PJ d ⁇ - PJ cn aad ⁇ ö ⁇ - o ⁇ -
- PJ d ⁇ ⁇ ⁇ cn ⁇ - HP ) ⁇ - ⁇ - tö d ⁇ rr ⁇ tr a HP cn ⁇ - a ⁇ dd - ⁇ «H a P> PJ ⁇ - cn in ⁇ d ⁇ tn ⁇ ⁇ a P. o ⁇ t cn o ⁇ cn O PJ ⁇ - P. d
- the RAKE receiver RAKE measures the reception power for the organizational information oi and uses it as a reference for decisions to switch to other cells and for power regulation.
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU96205/98A AU9620598A (en) | 1997-10-27 | 1998-08-24 | Method and mobile communications system for transmitting information via a radiointerface |
EP98949932A EP1033054A1 (de) | 1997-10-27 | 1998-08-24 | Verfahren und mobil-kommunikationssystem zur übertragung von informationen über eine funkschnittstelle |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19747453.5 | 1997-10-27 | ||
DE19747453A DE19747453C1 (de) | 1997-10-27 | 1997-10-27 | Verfahren und Mobil-Kommunikationssystem zur Übertragung von Informationen über eine Funkschnittstelle |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999022544A1 true WO1999022544A1 (de) | 1999-05-06 |
Family
ID=7846793
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1998/002475 WO1999022544A1 (de) | 1997-10-27 | 1998-08-24 | Verfahren und mobil-kommunikationssystem zur übertragung von informationen über eine funkschnittstelle |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1033054A1 (de) |
CN (1) | CN1169399C (de) |
AU (1) | AU9620598A (de) |
DE (1) | DE19747453C1 (de) |
WO (1) | WO1999022544A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102016220007A1 (de) * | 2016-10-13 | 2018-04-19 | Audi Ag | Fahrzeugschlüssel, damit zusammenwirkendes Suchgerät sowie System aus einem Fahrzeugschlüssel und einem Suchgerät |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4754453A (en) * | 1985-07-31 | 1988-06-28 | U.S. Philips Corporation | Digital radio transmission system with a connection-accompanying organization channel in the time-division multiplex frame |
WO1995019687A1 (en) * | 1994-01-14 | 1995-07-20 | Nokia Telecommunications Oy | Method for allocating channels in a radio system |
US5535215A (en) * | 1995-05-01 | 1996-07-09 | Motorola, Inc. | Method and apparatus for providing control channels and message channels in a radio communication system |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5295153A (en) * | 1992-04-13 | 1994-03-15 | Telefonaktiebolaget L M Ericsson | CDMA frequency allocation |
JP3134040B2 (ja) * | 1995-05-25 | 2001-02-13 | 三菱電機株式会社 | 時分割多重通信制御方法 |
DE19713667C1 (de) * | 1997-04-02 | 1998-10-01 | Siemens Ag | Basisstation und Empfangseinrichtung für ein Mobil-Kommunikationssystem mit TDMA-Teilnehmerseparierung |
-
1997
- 1997-10-27 DE DE19747453A patent/DE19747453C1/de not_active Expired - Fee Related
-
1998
- 1998-08-24 CN CNB988106388A patent/CN1169399C/zh not_active Expired - Fee Related
- 1998-08-24 EP EP98949932A patent/EP1033054A1/de not_active Withdrawn
- 1998-08-24 AU AU96205/98A patent/AU9620598A/en not_active Abandoned
- 1998-08-24 WO PCT/DE1998/002475 patent/WO1999022544A1/de active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4754453A (en) * | 1985-07-31 | 1988-06-28 | U.S. Philips Corporation | Digital radio transmission system with a connection-accompanying organization channel in the time-division multiplex frame |
WO1995019687A1 (en) * | 1994-01-14 | 1995-07-20 | Nokia Telecommunications Oy | Method for allocating channels in a radio system |
US5535215A (en) * | 1995-05-01 | 1996-07-09 | Motorola, Inc. | Method and apparatus for providing control channels and message channels in a radio communication system |
Also Published As
Publication number | Publication date |
---|---|
CN1169399C (zh) | 2004-09-29 |
EP1033054A1 (de) | 2000-09-06 |
AU9620598A (en) | 1999-05-17 |
DE19747453C1 (de) | 1999-05-12 |
CN1278396A (zh) | 2000-12-27 |
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