EP1658735A2 - Verfahren zum betrieb einer basisstation eines mobilfunksystems, signalisierungseinheit, steuereinheit, mobilstation und computerprogramm - Google Patents
Verfahren zum betrieb einer basisstation eines mobilfunksystems, signalisierungseinheit, steuereinheit, mobilstation und computerprogrammInfo
- Publication number
- EP1658735A2 EP1658735A2 EP04766609A EP04766609A EP1658735A2 EP 1658735 A2 EP1658735 A2 EP 1658735A2 EP 04766609 A EP04766609 A EP 04766609A EP 04766609 A EP04766609 A EP 04766609A EP 1658735 A2 EP1658735 A2 EP 1658735A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- mobile radio
- radio system
- frequency band
- base station
- signal
- 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.)
- Withdrawn
Links
- 230000011664 signaling Effects 0.000 title claims abstract description 67
- 238000000034 method Methods 0.000 title claims description 20
- 238000004590 computer program Methods 0.000 title claims description 6
- 230000005540 biological transmission Effects 0.000 claims abstract description 43
- 230000001413 cellular effect Effects 0.000 description 6
- 238000011161 development Methods 0.000 description 6
- 230000018109 developmental process Effects 0.000 description 6
- 230000001771 impaired effect Effects 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 230000006735 deficit Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000009420 retrofitting Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/14—Spectrum sharing arrangements between different networks
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/16—Performing reselection for specific purposes
- H04W36/20—Performing reselection for specific purposes for optimising the interference level
Definitions
- the invention relates to a method for operating a base station of a mobile radio system, a corresponding signaling unit, a control unit, a mobile station and a computer program.
- Cellular mobile radio systems have a large number of radio cells, which are usually supplied by a base station.
- a known type of cellular mobile radio system is based on that which is widespread in Europe
- GSM Global System of Mobilcommunication
- UMTS-FDD Universal Mobile Telecommunications Standard-Frequency Division Duplex
- paired bands a frequency band for the uplink and one frequency band for the downlink (downlink).
- paired bands an additional (unpaired) frequency band for the downward direction. Because of the asymmetry of future data services, more transmission capacity is required in the downward direction than in the upward direction.
- FIG. 1 shows a possible arrangement of the two different network operators or their mobile radio systems. frequency bands.
- a frequency band ULI for the upward direction and a frequency band DLl for the downward direction have been assigned to the first mobile radio system.
- a frequency band UL2 for the upward direction, a frequency band DL2 for the downward direction and a further frequency band DL3 for the downward direction have been assigned to the second mobile radio system. It is assumed that there are two geographically overlapping cellular mobile radio networks that are operated using the frequency bands mentioned.
- the frequency bands ULI, UL2 for the upward direction and the frequency bands DL1, DL2 for the downward direction shown in FIG. 1 each have a mutual band spacing of almost zero, that is, are immediately adjacent to one another, and base stations of the two mobile radio systems with a large spacing can be arranged to each other (that is, the associated radio cells have a large radius), there may be interference in connections of one mobile radio system by connections of the other mobile radio system.
- signals that are transmitted from a subscriber station of the second system in the frequency band UL2 to a corresponding base station of the second mobile radio system can influence the reception quality of a base station of the first system that receives signals from other subscriber stations in its radio cell in the uplink band ULI.
- the interference occurs in particular when the subscriber station of the second system is far away from its base station and thus transmits at high power, but is located in the vicinity of the base station of the first system. Conversely, there may be interference from the signals transmitted by the base station of the first mobile radio system in the frequency band DL1 at the subscriber station of the second mobile radio system, for their reception in the second mobile radio system. radio system actually the frequency band DL2 is provided within the second mobile radio system. Since the maximum transmission power of a base station is greater than the maximum transmission power of a subscriber station, the aforementioned interference between the two superimposed mobile radio systems is greater in the downward direction than in the upward direction. This applies at least as long as the additional downward frequency band DL3 is not used by the second mobile radio system.
- Figure 2 shows how this fact affects in the case of strong interference in systems according to the UMTS-FDD standard.
- the subscriber station or base station that transmits in the respective band is specified below the frequency bands.
- a subscriber station MSI and a base station BS1 of the first mobile radio system and a subscriber station MS2 and a base station BS2 of the second system are considered. If the subscriber station MS2 of the second system moves away from its own base station BS2 of the second mobile radio system with which it is currently communicating, and in the process moves towards the base station BS1 of the first system, it must increase its transmission power in order to continue to be acceptable To ensure connection with your own base station BS2. In this way, interference occurs within the frequency band ULI of the first mobile radio system by the base station BS1 of the first system
- MSI receives transmissions from its own subscriber stations. At the same time, however, the interference of the emissions of the base station BS2 of the second mobile radio system in the frequency band DL2 in the downward direction increases, which is caused by the emissions of the base station BS1 of the first mobile radio system in the frequency band DL1. Because the transmission power of the latter base station BSl is in in any case greater than the transmitting power of the subscriber station
- the signal quality in the frequency band DL2 of the second system is impaired so much due to the greater interference in the downward direction compared to the upward direction that reception at the subscriber station MS2 of the second mobile radio system is no longer possible.
- This is shown by the number 1 in FIG. 2 and by crossing out the frequency band DL2 in the downward direction of the second mobile radio system.
- the relevant connection is also automatically switched off in the upward direction in the frequency band UL2 in accordance with this standard. This is indicated in Figure 2 by the number 2 and the corresponding arrow. This prevents the transmissions of the subscriber station MS2 of the second mobile radio system in the frequency band UL2 from impairing the reception of the base station BS1 of the first system in the frequency band ULI too much.
- the mechanism just described does not work, however, if for the connection with the subscriber station MS2 in the second mobile radio system in the downward direction it is not the frequency band DL2 symmetrical or paired to the frequency band UL2 that is used, but the unpaired band DL3 (see FIG. 1). Due to the larger band gap d between the frequency bands DL1 and DL3 of the two mobile radio systems, interference between the signals transmitted by the base stations BS1, BS2 is no longer as easy. Severe interference between the subscriber stations MSI, MS2 of the two However, signals transmitted to the base station of the mobile radio systems are still possible due to the small band gap between the two up-frequency bands ULI, UL2. Avoiding these interferences in the manner explained with reference to FIG. 2 cannot therefore take place, so that negative influences on the operation or reception of the base station BS1 of the first mobile radio system can be expected.
- the invention is based on the object of reducing the problem of interference with the operation of the base station of the first mobile radio system by transmissions from subscriber stations of the second mobile radio system even in the case of using an unpaired frequency band for the downlink in the second mobile radio system.
- the method according to the invention for operating a first base station of a first mobile radio system provides that a signaling unit of the first mobile radio system sends a signal that serves to reduce the influence of the transmissions of the subscriber station of the second mobile radio system on the reception of the first base station in the first frequency band.
- the signaling unit of the first mobile radio system is able to react to the influence of the operation of the first base station by the operation of the second mobile radio system.
- the first mobile radio system influences the operation of the second mobile radio system by transmitting the signal from its signaling unit.
- the signaling unit sends the signal in a third frequency band, which is provided within the second mobile radio system for receiving signals associated with the connection by the subscriber station.
- This ensures that the signal can be received by the corresponding receiving devices of the subscriber station and the second mobile radio system, which are already configured for reception in the third frequency band for the reason that they can receive signals transmitted to them within the second mobile radio system , It is therefore not necessary to provide a separate radio-frequency receiver for receiving the signal from the signaling unit in the subscriber stations. There is also no need for complex measurements on frequencies that are not currently used for communication with your own base station.
- the transmission power of the signaling unit for the signal to be transmitted is set in such a way that the connection of at least one of the subscriber stations of the second mobile radio system in the third frequency band is disturbed by the signal to such an extent that this connection is then changed by another Frequency band in- is assigned within the second mobile radio system.
- the signal of the signaling unit contains information which serves to signal that the reception of the first base station can be influenced by the transmissions of the subscriber stations.
- the signal is designed in such a way that it can be taken from it in such a way that the operation of the first base station can be influenced accordingly.
- appropriate measures can be taken by a station that receives the signal from the signaling unit, in order to avoid or reduce a corresponding disruptive influence.
- the information of the signal contains information about the first frequency band. Then it can be seen from the signal which upward frequency band the first base station uses for its reception.
- the signal from the signaling unit can then be used to decide whether or not transmissions from certain subscriber stations of the second mobile radio system can negatively influence the reception of the first base station. This can be assessed depending on which frequency bands are used for the transmission and reception of the respective subscriber station and how these rela- are arranged tiv to the first frequency band of the first base station.
- the subscriber station of the second mobile radio system receives the signal of the signaling unit of the first mobile radio system and then sends information about the signal received by it to a second base station of the second mobile radio system that maintains the connection with it.
- network-side devices of the second mobile radio system can be informed about the signal of the signaling unit and are therefore able to adapt the frequency bands used for the connection, if this appears necessary.
- the subscriber station of the second mobile radio system receives the signal of the signaling unit of the first mobile radio system, and a measure of the received power of the signal received by the subscriber station from the signaling unit is determined. On the basis of the determined measure of the reception power, it is decided whether the subscriber station is assigned a different frequency band for its connection. On the basis of the received power of the signal, it can be concluded to what extent the transmissions from the subscriber station of the second mobile radio system can influence the reception of the first base station. This can be achieved, for example, by the signaling unit always sending out its signal with a constant transmission power. Then the reception power at the subscriber station of the second mobile radio system will in most cases be proportional to the distance to the signaling unit, which is preferably in immediate is arranged close proximity to the first base station, or is even part of the first base station.
- the signaling unit is implemented separately from the first base station, it is particularly suitable for retrofitting corresponding mobile radio systems that previously used conventional base stations and do not have a corresponding signaling unit.
- the integration of the signaling unit in the first base station allows the use of at least some of the components of the first base station for transmitting the signal of the signaling unit, for example the transmitting antenna of the first base station.
- Influence of the reception of the first base station is determined and the transmission power of the signal of the signaling unit is adapted as a function of the ascertained influence.
- the reception power of the signal of the signaling unit at the subscriber station of the second mobile radio system is therefore proportional to the previously determined influence on the reception of the first base station.
- the degree of influence can then advantageously be estimated from the received power and, as a result of this estimation, a decision can be made as to whether the use of a different frequency band is necessary for connecting the subscriber station of the second mobile radio system.
- the signal is only emitted by the signaling unit of the first mobile radio system when interference with the reception of the first base station exceeds a certain level.
- the signaling unit only requires transmission power if it is sensible to send the signal to avoid interference.
- interference caused by the transmission of the signal from the signaling unit is reduced in this way.
- the signal of the signaling unit can also be emitted continuously or regularly, for example periodically.
- the third frequency band can be replaced by another frequency band of the second mobile radio system.
- another frequency band can be selected which is arranged closer to a corresponding downward frequency band of the first base station than the third frequency band.
- the second frequency band U12 is replaced by another frequency band of the second mobile radio system. It is particularly advantageous if the other frequency band is located further away from the first frequency band Uli of the first base station than the second frequency band, so that interference from the transmissions of the subscriber station of the second mobile radio system, which impair the reception of the first base station, are reduced.
- the connection of the subscriber station of the second mobile radio system is changed from a second base station of the second mobile radio system supplying it to another base station. This is a transfer of the connection from the second base station to the other base station of the second mobile radio system, which is referred to as a cell change (handover).
- the signaling unit according to the invention and the computer program according to the invention have the components or instructions required for carrying out the method according to the invention and its further developments.
- the mobile station according to the invention for a second mobile radio system has corresponding means for receiving a signal from a signaling unit of the first mobile radio system.
- the control unit according to the invention for assigning radio channels in a second mobile radio system is designed such that it assigns a new frequency band to a subscriber station of the second mobile radio system as a function of a signal sent by a signaling unit of a first mobile radio system.
- the invention is particularly suitable for use in mobile radio systems according to the UMTS-FDD standard.
- mobile radio systems of any other standards can also be considered.
- the subscriber stations of the first and second mobile radio systems do not all have to be mobile his . Rather, at least some of the subscriber stations can also be stationary.
- FIG. 2 shows the influence of interference between frequency bands from FIG. 1 according to the prior art
- FIG. 3 the consideration of disturbances in an exemplary embodiment of the invention
- FIG. 4 the consideration of disturbances in a second exemplary embodiment of the invention
- FIG. 5 base stations and mobile stations of two locally overlapping mobile radio systems
- FIG. 7 shows the operation of two mobile stations of the second mobile radio system in the vicinity of a base station of the first mobile radio system from FIG. 5.
- FIG. 5 shows a section of two cellular, that is to say a plurality of radio cells, mobile radio systems M1, M2.
- the first mobile radio system M1 contains a first base station BS1, which communicates with a first subscriber station MSI via a connection S1.
- the second mobile radio system M2 contains a second base station BS2, which communicates with a second subscriber station MS2 via a second connection S2.
- the radio cells or coverage areas of the two base stations BS1, BS2 should overlap geographically so that interference can occur between the mobile radio systems M1, M2 if the frequency bands used for this are too close to one another.
- FIG. 3 shows the frequency bands used for the connections S1, S2 from FIG. 5.
- the stations from FIG. 5 transmitting in the corresponding frequency band are listed below the frequency bands in FIG. 3.
- the first base station BS1 uses a downward frequency band DL1 for its transmissions of the first connection S1 to the first subscriber station MSI.
- the first subscriber station MSI uses an uplink frequency band ULI for the first connection S1.
- the two frequency bands ULI, DLl of the first connection S1 form two paired frequency bands.
- the second base station BS2 uses an asymmetrical downlink band DL3 for the second connection ⁇ 2, which has a comparatively large band gap b compared to the downlink band DL1 of the first base station BS1.
- Another base band DL2 is also available to the second base station BS2, which is not currently used for the second connection S2 and which is arranged immediately adjacent to the downband band DL1 of the first base station BS1.
- the second subscriber station MS2 uses an uplink band UL2 for the second connection S2, that is immediately adjacent to the upband ULI of the first
- Subscriber station MSI is arranged. Since the second base station BS2 according to FIG. 3 does not use the downlink band DL2 immediately adjacent to the downlink band DL1 of the first base station BS1, but the asymmetrical downlink band DL3, the mechanism described above with reference to FIG. 2 cannot be carried out.
- the first mobile radio system M1 also has a signaling unit SG which is arranged in the immediate vicinity of the first base station BS1 and can, for example, be an integral part of the first base station BS1.
- the signaling unit SG is connected to the antenna of the first base station BS1 and transmits a signal S via the latter. This does not take place in the downlink band DL1, which the first base station BSl uses to operate its connections S1, but in the asymmetrical downlink band DL3, which is used by the second base station BS2 of the second mobile radio system M2.
- the second subscriber station MS2 of the second mobile radio system M2 receives the signal S from the signaling unit SG and forwards corresponding information I to the second base station BS2 connected to it.
- the signal S of the signaling unit SG contains information about the uplink band ULI in which the first base station BS1 is operated. This is indicated by the reference symbol in brackets in FIG. 5.
- the second mobile station MS2 uses this information I to transmit this indication of the uplink band ULI to the second base station BS2.
- the second subscriber station MS2 determines the received power of the signal S. She also shares the result of this investigation with the information I of the second base station BS2.
- the second mobile radio system M2 evaluates the information I and decides whether the assignment of a different frequency band for the second connection S2 to the second subscriber station MS2 makes sense. On the basis of the information about the frequency band ULI used in the upward direction by the first base station BSl, it can be judged in the second mobile radio system M2 whether the uplink band UL2 used for the second connection S2 is so close to the upward band ULI of the first base station BS1 that by the transmissions of the second subscriber station MS2 the reception of the first base station BS1 is impaired. This assessment also takes into account the received power of the signal S of the signaling unit SG determined by the second subscriber station MS2.
- the signaling unit SG sends out its signal S with a constant transmission power.
- the reception power at the second subscriber station MS2 can then be used to assess how close the second subscriber station MS2 is to the signaling unit SG and thus also to the first base station BS1. The closer the second subscriber station MS2 is to the first base station BS1, the greater the interference caused by the former to the first base station BS1.
- the evaluation of the information I by the second base station BS2 or another central unit of the second mobile radio system M2 reveals that the transmissions from the second subscriber station MS2 are likely to impair the reception of the first base station BS1 too much (this can be determined, among other things, by that the value the received power of the signal S at the second subscriber station MS2 is compared with a corresponding limit value), in this exemplary embodiment it causes a change in the downlink band DL3 used for the second connection S2 to the other downlink band DL2 available to it, which corresponds to the downlink band DL1 is directly adjacent to the first base station BS1. This is indicated by the arrow in FIG. 3 and the reference symbol BS2 in brackets.
- FIG. 4 shows another measure which can be taken within the second mobile radio system M2 on the basis of the information I transmitted by the second subscriber station MS2. It is assumed here that the second mobile radio system M2 has another uplink band UL3 available. If it is now determined that the interference of the first base station BS1 by the second subscriber station MS2 is too large, the uplink band UL2 is no longer used for the second connection S2, but the further uplink band UL3, which is associated with the downlink band DL3 used for the connection S2 Forms pair of frequency bands. The change of the uplink bands UL2, UL3 within the second mobile radio system M2 is indicated in FIG. 4 by the arrow. Since the further upward band UL3 has a large band gap to the upward band ULI used within the first mobile radio system, there are now further interference from the transmissions the second subscriber station MS2 at the first base station
- the further upward band UL3 in FIG. 4 can also be below the first upward channel ULI (to the left of this in FIG. 4).
- FIG. 6 shows a top view of the relative arrangement of the first base station BS1 of the first mobile radio system, the second base station BS2 of the second mobile radio system and the second subscriber station MS2, which communicates with the second base station BS2 via the connection S2.
- a third base station BS3 of the second mobile radio system M2 is also shown, which is at a shorter distance from the second subscriber station MS2 than the second base station BS2.
- FIG. 6 also shows the radio cells C1, C2, C3 or coverage areas of the three base stations BS1, BS2, BS3.
- connection S2 of the second subscriber station MS2 from the second base station B ⁇ 2 is transferred to the third base station BS3 (handover).
- This transfer of connections is controlled by a central unit CT of the second mobile radio system M2, which can be a base station controller, for example, and is connected to the two base stations BS2, BS3 of the second mobile radio system M2.
- the transmission of the information I in FIG. 5 by the second subscriber station MS2 can be dispensed with.
- the signaling unit SG can select the transmission power for the signal S so high that the reception of the second subscriber station MS2 in the downlink band DL3 of the second mobile radio system M2 is disturbed so much that the data of the second connection S2 is no longer properly detected by the second subscriber station MS2 can be. This is recognized within the second mobile radio system M2, whereupon another upband and / or new downband is automatically assigned or a connection is transferred to the third base station BS3.
- the signaling unit SG sets the transmission power for the signal S as a function of the influence on the reception of the first base station BS1.
- a signal-to-noise ratio for the first connection S1 in the uplink direction can be determined, for example. tion can be determined. The worse the signal
- Noise ratio at the first base station BSl the higher the power is selected for sending the signal S.
- the signal S is only emitted if interference in the reception of the first base station BS1 exceeds a certain level, that is to say the signal-to-noise ratio falls below a certain minimum value.
- FIG. 7 again shows a top view of the first base station BS1 of the first mobile radio system M1 within its radio cell C1.
- the signaling unit SG transmits the signal S omnidirectionally via the first base station BS1.
- the received power of the signal S at subscriber stations MS2 located there reaches a predetermined limit. Only if this limit value of the received power is exceeded does the second subscriber station MS2 transmit the information I to the second base station BS according to FIG.
- the embodiment described first with reference to FIG. 5 is again assumed. If the second subscriber station MS2 is within the area 1, it can carry out the actions explained with reference to FIG. 5.
- a third subscriber station MS3 of the second mobile radio system M2 is arranged within the first radio cell C1 so far from the first base station BS1 that the received power of the signal S is below the critical limit value at its position. It therefore concludes that it does not impair the reception of the first base station BS1 and, accordingly, does not send any information I to the second base station BS2 communicating with it. Since the signal S in the exemplary embodiment according to FIG.
- the second subscriber station MS2 can use this information to assess whether it is to be expected that the reception of the first base station BSl will be impaired at all. This depends on the band gap between the upband used by the second subscriber station MS2 and the uplink ULI used by the first base station BS1. If, in deviation from FIG. 3 and FIG. 4, the second subscriber station MS2, for example, does not use the upband UL2 from the outset, but for example the further upband UL3 entered in FIG. 4, the second subscriber station MS2 could already determine on the basis of the details of the signal S that an impairment is excluded, so that further measures on your part are not necessary. In this case, a determination of the received power of the signal S at the second subscriber station MS2 and a transmission of the information I to the second base station BS2 can then be omitted.
- the threshold value analysis for the received power of the signal S at the second subscriber station MS2 explained with reference to FIG. 7 can alternatively also be carried out after the transmission of the corresponding information I according to FIG. 5 in the second base station BS2 or in a central unit of the second mobile radio system M2 connected to it become.
- the signaling unit SG which is assigned to the first base station BSl, transmits the signal S in each asymmetrical downlink band DL3 of all mobile radio systems locally superimposed on the first mobile radio system Ml.
- special signatures are used within the signal S with which the uplink band ULI used is signaled in coded form.
- the signal S of the signaling unit SG is transmitted in the same frequency band that is used for regular reception by the second subscriber station MS2 and other subscriber stations of the second mobile radio system M2, these subscriber stations can use the signal S without changing the frequency band they receive, the means without so-called inter-frequency measurements, in addition to their own connections S2 received within the second mobile radio system.
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10339898A DE10339898B4 (de) | 2003-08-29 | 2003-08-29 | Verfahren zum Betrieb einer Basisstation eines Mobilfunksystems, Signalisierungseinheit, Steuereinheit, Mobilstation und Computerprogramm |
| PCT/EP2004/051919 WO2005025240A2 (de) | 2003-08-29 | 2004-08-26 | Verfahren zum betrieb einer basisstation eines mobilfunksystems, signalisierungseinheit, steuereinheit, mobilstation und computerprogramm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1658735A2 true EP1658735A2 (de) | 2006-05-24 |
Family
ID=34258278
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP04766609A Withdrawn EP1658735A2 (de) | 2003-08-29 | 2004-08-26 | Verfahren zum betrieb einer basisstation eines mobilfunksystems, signalisierungseinheit, steuereinheit, mobilstation und computerprogramm |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US7606534B2 (de) |
| EP (1) | EP1658735A2 (de) |
| JP (1) | JP2007504691A (de) |
| CN (1) | CN1846384A (de) |
| DE (1) | DE10339898B4 (de) |
| MX (1) | MXPA06002186A (de) |
| WO (1) | WO2005025240A2 (de) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1686818A1 (de) * | 2005-01-27 | 2006-08-02 | Siemens Aktiengesellschaft | Verfahren zum Empfangen, Verfahren zum Senden und Verfahren zum Weiterleiten eines Informationselements über eine Luftschnittstelle sowie Funkstation zum Empfangen, Funkstation zum Senden und Teilnehmerstation zum Weiterleiten |
| JP4844215B2 (ja) * | 2006-04-26 | 2011-12-28 | 日本電気株式会社 | 移動通信システム及びその動作制御方法並びに無線基地局 |
| JP5087412B2 (ja) * | 2007-02-28 | 2012-12-05 | 株式会社エヌ・ティ・ティ・ドコモ | 送信機、移動通信システム、基地局及び通信許可信号送信装置 |
| US8200169B2 (en) | 2007-02-28 | 2012-06-12 | Ntt Docomo, Inc. | Transmitter apparatus, mobile communication system, base station and communication enable signal transmitter apparatus |
| US8995919B2 (en) * | 2011-12-15 | 2015-03-31 | At&T Intellectual Property I, L.P. | Interference management using out-of-band signaling |
| CN104041101A (zh) * | 2012-12-26 | 2014-09-10 | 华为技术有限公司 | 小区管理方法及系统 |
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| US5732076A (en) * | 1995-10-26 | 1998-03-24 | Omnipoint Corporation | Coexisting communication systems |
| FI102580B1 (fi) * | 1996-06-17 | 1998-12-31 | Nokia Mobile Phones Ltd | Menetelmä matkaviestimen aiheuttamien häiriöiden eliminoimiseksi |
| DE19703923A1 (de) | 1997-02-03 | 1998-08-06 | Hochscherff Andreas | Sendestopper für Mobiltelefone |
| KR20010023816A (ko) * | 1997-09-09 | 2001-03-26 | 칼 하인쯔 호르닝어 | 이동 무선전화 단말기들, 무선국 및 이동 무선전화단말기에 의해 방출되는 전자기 방사선으로부터 제한된국부 영역을 보호하는 방법 |
| JP3109504B2 (ja) * | 1998-03-27 | 2000-11-20 | 日本電気株式会社 | セルラシステムおよびセルラシステムの隣接周波数干渉回避方法と移動局 |
| EP1035747A1 (de) * | 1999-03-12 | 2000-09-13 | Sony International (Europe) GmbH | Basisstation für das Schützen eines vorbestimmten Bereiches mittels eines getrennten Schutzsystems |
| US6606496B1 (en) * | 2000-08-25 | 2003-08-12 | Lucent Technologies Inc. | Reverse link other cell interference locator and handoff trigger for wireless network |
| US7177598B2 (en) * | 2000-11-15 | 2007-02-13 | Wi-Lan, Inc. | Method and system for reducing channel interference in a frame-synchronized wireless communication system |
| US7653385B2 (en) * | 2001-01-26 | 2010-01-26 | Arend Brian L | Wireless telecommunications signal inhibition |
| JP3875042B2 (ja) * | 2001-05-25 | 2007-01-31 | 株式会社エヌ・ティ・ティ・ドコモ | 干渉除去システム及び干渉除去方法 |
| JP4014823B2 (ja) * | 2001-05-25 | 2007-11-28 | 株式会社エヌ・ティ・ティ・ドコモ | 通信チャネル設定方法及び通信制御装置 |
| JP2003009222A (ja) | 2001-06-27 | 2003-01-10 | Matsushita Electric Ind Co Ltd | 移動局装置及び異なる移動体通信システム間の信号干渉削減方法 |
| US20030109284A1 (en) * | 2001-12-07 | 2003-06-12 | Dag Akerberg | Flexible carrier utilization |
| JP3912118B2 (ja) * | 2002-01-21 | 2007-05-09 | ソニー株式会社 | 無線通信システム、無線通信端末および制御局 |
| JP4003536B2 (ja) * | 2002-05-22 | 2007-11-07 | 日本電気株式会社 | セルラシステム、移動局、基地局制御装置及びそれに用いる異周波数切替え方法 |
| US6961595B2 (en) * | 2002-08-08 | 2005-11-01 | Flarion Technologies, Inc. | Methods and apparatus for operating mobile nodes in multiple states |
| JP4412033B2 (ja) * | 2004-03-31 | 2010-02-10 | 沖電気工業株式会社 | 無線通信装置 |
-
2003
- 2003-08-29 DE DE10339898A patent/DE10339898B4/de not_active Expired - Fee Related
-
2004
- 2004-08-26 MX MXPA06002186A patent/MXPA06002186A/es not_active Application Discontinuation
- 2004-08-26 JP JP2006524368A patent/JP2007504691A/ja active Pending
- 2004-08-26 EP EP04766609A patent/EP1658735A2/de not_active Withdrawn
- 2004-08-26 WO PCT/EP2004/051919 patent/WO2005025240A2/de not_active Ceased
- 2004-08-26 US US10/569,842 patent/US7606534B2/en not_active Expired - Fee Related
- 2004-08-26 CN CNA200480024931XA patent/CN1846384A/zh active Pending
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2005025240A2 * |
Also Published As
| Publication number | Publication date |
|---|---|
| US20070036111A1 (en) | 2007-02-15 |
| JP2007504691A (ja) | 2007-03-01 |
| US7606534B2 (en) | 2009-10-20 |
| DE10339898A1 (de) | 2005-04-07 |
| DE10339898B4 (de) | 2007-03-22 |
| MXPA06002186A (es) | 2006-05-22 |
| WO2005025240A2 (de) | 2005-03-17 |
| WO2005025240A3 (de) | 2005-04-28 |
| CN1846384A (zh) | 2006-10-11 |
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