CN103338099B - Communication means in mobile communication system and mobile communication system - Google Patents
Communication means in mobile communication system and mobile communication system Download PDFInfo
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- CN103338099B CN103338099B CN201310246683.4A CN201310246683A CN103338099B CN 103338099 B CN103338099 B CN 103338099B CN 201310246683 A CN201310246683 A CN 201310246683A CN 103338099 B CN103338099 B CN 103338099B
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Abstract
The present invention provides the communication means in mobile communication system and mobile communication system.Service band is divided into multiple predetermined frequency band and time division multiplex, the method is it can be avoided that following problems, namely owing to CQI ratio of precision is poor, the scheduling of channel configuration is had undesirable effect, make throughput degradation, the method inserts known frequency pilot sign with predetermined base interval in the plurality of predetermined frequency band, and at least one frequency band of the plurality of predetermined frequency band, inserts with the interval less than described predetermined base interval and configure described known frequency pilot sign.
Description
The application is the applying date is on August 2nd, 2007, and application number is 200780100130.0, and denomination of invention is the divisional application of the application for a patent for invention of " pilot frequency collocation method in mobile radio communications system and be suitable for the R-T unit of the method ".
Technical field
The present invention relates to the communication means in mobile communication system and mobile communication system.
Background technology
About mobile radio communications system, to 3G (Third Generation) Moblie follow-on accessing wirelessly mode even again, at 3GPP(3rdGenerationPartnershipProject: third generation collaborative project) in LTE(LongTermEvolution: Long Term Evolution project) address discuss.
In LTE, premise is to carry out frequency and time scheduling according to Resource Block (RB:ResourceBlock) or Resource Unit (RU:ResourceUnit) unit.
Fig. 1 is the figure that this frequency and time scheduling are described.Service band is by according to Resource Block unit, to multiple user terminals, i.e. mobile terminal (UE:UserEquipment, subscriber equipment) dividing frequency.
It addition, also carry out the time-division with a subframe unit on time-axis direction, the frequency of Resource Block unit is switched and distributes to multiple mobile terminal (UE).
The scheduling of the distribution of subframe unit on this frequency axis and time-axis direction is carried out by base station.
Wherein, when being scheduling, the channel quality information (CQI:ChannelQualityInformation) being typically based on Resource Block (RB) or Resource Unit (RU) unit is scheduling.
CQI corresponds to signal to noise ratio (SIR), and when measuring the SIR of mobile terminal side, generally the level mainly through monitoring the shared pilot tone shared from the user of base station carries out.
Additionally disclose in above-mentioned LTE, configure the technology (non-patent literature 1) of shared pilot channel in the downlink along frequency direction at spaced intervals.
That is, Fig. 2 indicates that the figure of example that illustrate in non-patent literature 1, configure shared pilot channel (PC) at spaced intervals along frequency direction.
It addition, patent documentation 1 proposes following structure, in order to improve the measurement accuracy of SIR, sharing frequency pilot sign and known array to each time slot is additional, the communicator receiving side uses the shared frequency pilot sign received in time slot and known array to estimate SIR.
In the mode shown in above-mentioned LTE, when the insertion interval of pilot channel is very big, when transmission antenna quantity is many or when user's multiplexing quantity is many etc., the configuration space of pilot tone increases.Therefore, in the Resource Block of certain unit and Resource Unit, the quantity of the shared pilot tone of configuration reduces.
Wherein, about measure SIR time I(jamming power) mensuration, general formula 1 represents, the schematic diagram of mensuration is as shown in Figure 3.Formula 1 represents obtains the meansigma methods of front and back pilot level and the difference of corresponding pilot channel position as jamming power.
It addition, in above-mentioned formula 1, as it is shown on figure 3, Pj represent the pilot frequency mode of jth subcarrier cancel after pilot tone.
Non-patent literature 1:3GPPTR25.814v7.0.0 (7.1.1.2.2)
Patent documentation 1: Japanese Unexamined Patent Publication 2003-348046 publication
Wherein, when the configuration space of pilot channel is big, namely in mensuration, the pilot interval of use is big, especially under postponing the environment that dispersion is big, due to the frequency selectivity between subcarrier, I(jamming power) it is estimated relatively larger.
Therefore, the deteriorated accuracy that the SIR of certain Resource Block RB or Resource Unit RU unit estimates.
Therefore, when the interval of pilot channel is big, the deteriorated accuracy that SIR estimates, when being thus scheduling even from the CQI corresponding to SIR, CQI precision is also poor, so scheduling is had undesirable effect, handling capacity likely declines.
Above-mentioned patent documentation 1 describes use pilot tone and known array to improve the technology of the estimated accuracy of SIR, but without reference to the interval of pilot channel.
Summary of the invention
It is an object of the invention to, it is provided that pilot frequency collocation method in a kind of mobile radio communications system and be suitable for the R-T unit of the method, it is possible to solve the interval of this pilot channel bigger time drawback.
In order to achieve the above object, the invention is characterized in that the collocation method of pilot tone in mobile communication system, service band is divided into multiple predetermined frequency band by this mobile communication system, and carry out time division multiplex, in this collocation method, the plurality of predetermined frequency band inserts known frequency pilot sign with predetermined base interval, then at least one frequency band in the plurality of predetermined frequency band, inserts with the interval less than described predetermined base interval and configure described known frequency pilot sign.
It addition, at least one frequency band in the plurality of predetermined frequency band, insert the step configuring described known frequency pilot sign with the interval less than described predetermined base interval, it is possible to carry out according to the mensuration information of the signal to noise ratio receiving side.
According to this feature, SIR measuring machine based on known pilot can increase, and frequency interval diminishes, so I(jamming power) estimated accuracy improve, it can be avoided that following problems when being therefore scheduling according to the CQI corresponding to SIR in sending side, i.e. owing to CQI ratio of precision is poor, scheduling is had undesirable effect so that throughput degradation.
Accompanying drawing explanation
Fig. 1 is the figure that frequency and time scheduling are described.
Fig. 2 indicate that in non-patent literature 1 illustrate, in the frequency direction of shared pilot channel, interval carries out the example configured.
Fig. 3 indicates that I(jamming power when measuring SIR that general formula 1 represents) the figure of schematic diagram of mensuration.
Fig. 4 is based on the 1st configuration example of the pilot channel of the present invention.
Fig. 5 indicates that the figure of the structure of the dispensing device of the sending side device corresponding to embodiment illustrated in fig. 4 and base station.
Fig. 6 indicates that the figure of the topology example of the R-T unit of the mobile terminal side corresponding to the dispensing device shown in Fig. 5.
Fig. 7 indicates that the figure of the pilot channel configuration of the 2nd embodiment.
Fig. 8 indicates that the figure of the dispensing device structure of the sending side corresponding to embodiment illustrated in fig. 7.
Fig. 9 indicates that the figure of the R-T unit structure receiving side and mobile terminal side of the pilot channel corresponding to Fig. 7.
Figure 10 indicates that the figure of the structure of the dispensing device of the sending side of the 3rd embodiment of the present invention.
Figure 11 indicates that the figure of the structure of corresponding with the dispensing device of the sending side shown in Figure 10, to receive side R-T unit.
Figure 12 indicates that the figure of the structure of the dispensing device of the sending side of the 4th embodiment of the present invention.
Figure 13 indicates that the figure of the structure of corresponding with the dispensing device of the sending side shown in Figure 12, to receive side R-T unit.
Figure 14 indicates that the figure of the pilot channel configuration of the 5th embodiment based on the present invention.
Figure 15 indicates that in the dispensing device of sending side, is inserted tightly into the figure of the topology example of the quantity of shared pilot channel according to the quantity of information (traffic rate) the to send restriction controlling channel etc..
Figure 16 indicates that in the dispensing device of sending side, is inserted tightly into the figure of the example of the quantity of shared pilot channel according to the quantity of information (traffic rate) the to send restriction controlling channel etc..
Figure 17 indicates that the figure controlling to share the example of the configuration of pilot channel according to the scattered state of delay.
Figure 18 indicates that the curve chart of the effect of the present invention.
Detailed description of the invention
Hereinafter, with reference to the accompanying drawings of embodiments of the invention.
Fig. 4 is based on the 1st configuration example of the pilot channel of the present invention.
Generally, according to specification, as standard, when configuring pilot channel (PC) with predetermined base interval, such as 6 subcarrier (SC) (service band is divided into 6 frequency bands after multiple predetermined frequency band) interval, the present invention according to Fig. 2, in determined frequency field with less than common configuration space be spaced closely together (such as continuously) configuration pilot channel.
That is, in the 1st embodiment shown in Fig. 4, the Resource Block RB of each subframe front configures pilot channel continuously.
Fig. 5 represents the topology example of the dispensing device of the sending side communicator corresponding to embodiment illustrated in fig. 4 and base station, and Fig. 6 represents the topology example of the corresponding R-T unit receiving side communicator and mobile terminal.
In the sending side shown in Fig. 5, pilot signal from pilot channel generator 2 and the data from data and control signal generator 4 and control signal, after multiplex circuit 3 carries out channel multiplexing, modulated by sending part 5, amplified, be then transmitted from transmission antenna 6.
Wherein, in the dispensing device shown in Fig. 5, pilot channel generator 2 obtains the positional information of configuration pilot channel from pilot channel configuration information generating unit 1, according to the timing output shared pilot signal of corresponding position, and exports to multiplex circuit 3.
Fig. 6 indicates that the block diagram of the structure of the R-T unit of the pilot reception side corresponding to Fig. 5 and mobile terminal side.
The signal obtained after pilot signal and data and control signal multiplexing is received by antenna 10.By receiving signal demodulation in acceptance division 11, and it is easily separated in split circuit 12, then inputs demodulation/decoding circuit 13 and the pilot channel extraction unit 14 of data and control signal.
The pilot channel extraction unit 14 configuration information 15 according to that notified by sending side in advance or known shared pilot channel, controls the pilot detection timing in pilot channel extraction unit 14.
It addition, about the notice for the configuration information 15 of shared pilot channel from sending side be previously known or scheduling utilize control signal to notify before changing, it is possible to utilize other arbitrary methods to notify.
Pilot channel extraction unit 14 shares frequency pilot sign according to the timing detection of controlled pilot detection, exports its level to SIR determination part 16.
Demodulation/the decoding circuit 13 of data and control signal is also given the timing of detection pilot tone by pilot channel extraction unit 14, and provides the benchmark receiving timing of the data in the demodulation/decoding circuit 13 of data and control signal and control signal.
The SIR determination part 16 each reception frequency pilot sign to being notified by pilot channel extraction unit 14, measures signal to noise ratio and SIR according to its level.
The SIR being measured to is sent to CQI information generating unit 20.Further, as required, other relevant to line status information 21 are also transmitted to CQI information generating unit 20.
In CQI information generating unit 20, according to the SIR being measured to sent by SIR determination part 16 and other information 21 relevant to line status, existing processing method is utilized to generate the CQI information corresponding with sir value.
In multiplex circuit 23, by the CQI information so generated with from the data of data/control signals generating unit 22 and control signal multiplexing, it is sent to sending part 24.
Multiplexed signals is modulated by sending part 24, amplifies, and be sent to base station side from antenna 25.
In base station side, the CQI information according to being sent by the R-T unit of mobile terminal side estimates SIR.Further, according to the SIR estimated, pilot channel configuration information generating unit 1 existing method is utilized to generate the positional information of configuration pilot channel.
So, the shared pilot channel configuration information regenerated is to receive setting on the basis of reception situation of side, it is possible to improve according to sharing the SIR estimated accuracy that pilot tone obtains.
Fig. 7 indicates that the figure of the pilot channel configuration of the 2nd embodiment.In the 1st embodiment of Fig. 4, the position being configured with pilot tone continuously is taken as the position, front of each subframe.On the other hand, in the example in figure 7, it is configured to change the position being configured with pilot tone at predetermined intervals continuously.
Therefore, corresponding to the dispensing device of the sending side shown in Fig. 8 of embodiment illustrated in fig. 7, have and utilize time cycle configuration part 7 that pilot configuration information generating unit 1 is set the function of time cycle.Therefore, pilot configuration information generating unit 1 changes pilot channel configuration with the set time cycle, and timing occurs the pilot tone controlling pilot channel generator 2.
Other structure functions of the dispensing device of sending side are identical with the structure shown in Fig. 5 described above.
On the other hand, corresponding to the R-T unit structure of the pilot reception side of Fig. 7 and mobile terminal side as shown in Figure 9.
The R-T unit receiving side shown in Fig. 9 also has time cycle configuration part 26.This time cycle is identical with embodiment above, is known or is notified by sending side in advance.Therefore, it is possible to generate the pilot channel configuration information that receive side Tong Bu with sending side in pilot channel configuration information generating unit 15.
At the pilot channel position generated by pilot channel configuration information generating unit 15, control the pilot channel in pilot channel extraction unit 14 and extract timing.Other structures are identical with in above situation illustrated in fig. 6 with action.
Figure 10 is the structure of the dispensing device of the sending side of the 3rd embodiment of the present invention, and Figure 11 is the structure of the corresponding R-T unit receiving side.
In the dispensing device of the sending side shown in Figure 10, fixed model generating unit 70 is set in sending side, sends fixing timing to pilot tone channel configuration information generating unit 1, and control pilot channel allocation position.
Receive side shown in Figure 11, the fixed model generating unit 27 of correspondence is set, and controls pilot channel configuration information generating unit 15.
Following fixed model is at least set, i.e. the pilot channel allocation position of the benchmark determined according to specification is configured pilot tone more closely about fixed model.
Figure 12 is the structure of the dispensing device of the sending side of the 4th embodiment of the present invention, and Figure 13 is the structure of the corresponding R-T unit receiving side.
In the 4th embodiment, it is configured to be embedded in control signal channel by the information of the pilot frequency configuration position generated by pilot channel configuration information generating unit 1 and is sent to reception side.
Therefore, as shown in figure 13, in reception side apparatus, being demodulated by the demodulation/decoding circuit 13 of data and control signal/decoded control channel in the pilot channel configuration information that inserts, extracted by pilot channel configuration information generating unit 15.
Further, generating the extraction timing in pilot channel extraction unit 14 according to the pilot channel configuration information extracted, this is identical with embodiment above.
In the 4th embodiment, it is not necessary in advance pilot configuration information is informed to reception side.
Figure 14 indicates that the figure that the pilot channel as the 5th embodiment based on the present invention configures.
This embodiment is that the configuration of continuous print pilot channel is arranged on the topology example of multiple position adaptively.
Further, as the benchmark arranging the configuration of continuous print pilot channel in multiple positions adaptively, it is possible to realize the topology example shown in Figure 15, Figure 16 and Figure 17.
That is, Figure 15 is in the dispensing device of sending side, limits the topology example of the quantity being inserted tightly into pilot tone according to the quantity of information (traffic rate) to send of data channel etc..
Therefore, when making when sending preferential of data channel, by the state notifying of data signal that sent by data and control signal generator 4 to pilot channel configuration information generating unit 1.Thus, pilot channel configuration information generating unit 1 judges traffic rate, and generates the configuration information that closely can (continuously) insert pilot signal.Pilot tone, in the insertion timing of the pilot tone based on pilot configuration information, is sent to multiplex circuit 3 by pilot channel generating unit 2.
Later in Figure 15 processes identical with embodiment above.
Figure 16 indicates that in the dispensing device of sending side, limits the figure of the example of the quantity being inserted tightly into pilot tone according to the quantity of information (traffic rate) to send of data channel etc..
Figure 16 is the example that the state according to handling capacity controls pilot frequency configuration.That is, in the device of sending side, not shown device is utilized to monitor community and region handling capacity.In this supervision, in corresponding throughput degradation and less than threshold value, control pilot channel configuration information generating unit 1 so that closely carry out pilot frequency configuration.Pilot channel configuration information generating unit 1 is identical with the embodiment shown in Figure 12, is inserted into by close pilot channel configuration information in control channel, and is sent to reception side.Thereby, it is possible to change the configuration of continuous print pilot channel adaptively.
Figure 17 is the example controlling pilot signal configuration according to the scattered state of delay.That is, in the device of sending side, utilize not shown device to monitor and postpone dispersion.In this supervision, when postponing dispersion more than threshold value, the estimated accuracy of pilot frequency configuration position worsens, and therefore controls pilot channel configuration information generating unit 1 so that closely carry out pilot frequency configuration.It addition, pilot channel configuration information generating unit 1 is identical with the embodiment shown in Figure 16, close pilot channel configuration information is inserted in control channel, and is sent to reception side.
Figure 18 indicates that the curve chart of the effect of the present invention.According to the present invention, on position (according to the normal place that specification is determined) the insert continually pilot channel of benchmark so that pilot channel be configured as compact state.Therefore, as shown in figure 18, it is possible to understand that for worsening ratio more serious at SIR, pilot tone inserts interval more little (namely pilot tone is inserted more close), and the deterioration of estimation SIR is more light.
In figure 18, I represents when an insertion interval is set to 1, and II represents when an insertion interval is set to 3, and III represents that when an insertion interval is set to 6, insertion interval is more big, and the deterioration of estimation SIR is more serious.That is, according to the present invention, at the insertion interval of pilot signal more hour, it is possible to the precise decreasing of jamming power is suppressed more little.
Claims (2)
1. a mobile communication system, service band is divided into multiple predetermined frequency band by it, and carries out time division multiplex, and this mobile communication system is characterised by including:
Base station, it inserts multiple known frequency pilot signs with predetermined base interval in the plurality of predetermined frequency band, wherein, in at least one frequency band in the plurality of predetermined frequency band, known frequency pilot sign is inserted with the interval less than described predetermined base interval, further, it is set with at least one frequency band described in the insertion described known frequency pilot sign in interval less than described predetermined base interval according to the time cycle；And
Mobile terminal, it receives the described known frequency pilot sign transmitted from described base station.
2. the communication means in mobile communication system, service band is divided into multiple predetermined frequency band by this mobile communication system, and carries out time division multiplex, and this communication means is characterised by comprising the steps:
Pass through base station, the plurality of predetermined frequency band inserts multiple known frequency pilot signs with predetermined base interval, wherein, at least one frequency band in the plurality of predetermined frequency band, insert known frequency pilot sign with the interval less than described predetermined base interval；Further,
It is set with at least one frequency band described in the insertion described known frequency pilot sign in described interval less than described predetermined base interval according to the time cycle；And
By mobile terminal, receive the described known frequency pilot sign transmitted from described base station.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310246683.4A CN103338099B (en) | 2007-08-02 | 2007-08-02 | Communication means in mobile communication system and mobile communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310246683.4A CN103338099B (en) | 2007-08-02 | 2007-08-02 | Communication means in mobile communication system and mobile communication system |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007801001300A Division CN101772913B (en) | 2007-08-02 | 2007-08-02 | Pilot arrangement method in a mobile radio communication system and transmitter receiver set applied in the method |
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| Publication Number | Publication Date |
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| CN103338099A CN103338099A (en) | 2013-10-02 |
| CN103338099B true CN103338099B (en) | 2016-06-29 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005041515A1 (en) * | 2003-10-24 | 2005-05-06 | Qualcomm Incorporated | Frequency division multiplexing of multiple data streams in a wireless multi-carrier communication system |
| EP1542488A1 (en) * | 2003-12-12 | 2005-06-15 | Telefonaktiebolaget LM Ericsson (publ) | Method and apparatus for allocating a pilot signal adapted to the channel characteristics |
| WO2006049401A1 (en) * | 2004-10-30 | 2006-05-11 | See Ho Nam | Shoes |
| US20060146867A1 (en) * | 2002-12-13 | 2006-07-06 | Lee Lok-Kyu | Apparatus and method for signal constitution for downlink of ofdma-based cellular system |
| WO2006134949A1 (en) * | 2005-06-14 | 2006-12-21 | Ntt Docomo, Inc. | Transmitting apparatus, transmitting method, receiving apparatus and receiving method |
| WO2007055551A1 (en) * | 2005-11-14 | 2007-05-18 | Electronics And Telecommunications Research Institute | Method, apparatus for dynamic resource allocation method in ofdma-based cognitive radio system and forward link frame structure thereof |
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2007
- 2007-08-02 CN CN201310246683.4A patent/CN103338099B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060146867A1 (en) * | 2002-12-13 | 2006-07-06 | Lee Lok-Kyu | Apparatus and method for signal constitution for downlink of ofdma-based cellular system |
| WO2005041515A1 (en) * | 2003-10-24 | 2005-05-06 | Qualcomm Incorporated | Frequency division multiplexing of multiple data streams in a wireless multi-carrier communication system |
| EP1542488A1 (en) * | 2003-12-12 | 2005-06-15 | Telefonaktiebolaget LM Ericsson (publ) | Method and apparatus for allocating a pilot signal adapted to the channel characteristics |
| WO2006049401A1 (en) * | 2004-10-30 | 2006-05-11 | See Ho Nam | Shoes |
| WO2006134949A1 (en) * | 2005-06-14 | 2006-12-21 | Ntt Docomo, Inc. | Transmitting apparatus, transmitting method, receiving apparatus and receiving method |
| EP1898542A1 (en) * | 2005-06-14 | 2008-03-12 | NTT DoCoMo INC. | Transmitting apparatus, transmitting method, receiving apparatus and receiving method |
| WO2007055551A1 (en) * | 2005-11-14 | 2007-05-18 | Electronics And Telecommunications Research Institute | Method, apparatus for dynamic resource allocation method in ofdma-based cognitive radio system and forward link frame structure thereof |
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