CN102165742B - Adaptive transmission (TX)/reception (RX) pulse shaping filter for femtocell base stations and mobile stations within a network - Google Patents

Adaptive transmission (TX)/reception (RX) pulse shaping filter for femtocell base stations and mobile stations within a network Download PDF

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Publication number
CN102165742B
CN102165742B CN200980137272.3A CN200980137272A CN102165742B CN 102165742 B CN102165742 B CN 102165742B CN 200980137272 A CN200980137272 A CN 200980137272A CN 102165742 B CN102165742 B CN 102165742B
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China
Prior art keywords
shaping filter
pulse shaping
base station
cell base
narrow
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CN102165742A (en
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M·亚武兹
Y-C·林
Y·托克格兹
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Qualcomm Inc
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Qualcomm Inc
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Priority claimed from US12/539,341 external-priority patent/US8437762B2/en
Application filed by Qualcomm Inc filed Critical Qualcomm Inc
Priority claimed from PCT/US2009/059734 external-priority patent/WO2010022407A2/en
Publication of CN102165742A publication Critical patent/CN102165742A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices
    • 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
    • H04W16/24—Cell structures
    • H04W16/32—Hierarchical cell structures
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/04—Reselecting a cell layer in multi-layered cells

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

A mobile station may include a standard transmit pulse-shaping filter, a standard receive pulse-shaping filter, a narrower transmit pulse-shaping filter, and a narrower receive pulse-shaping filter. A femtocell base station may include a narrower transmit pulse-shaping filter and a narrower receive pulse-shaping filter. The mobile station may utilize the narrower transmit pulse-shaping filter for transmitting uplink signals and the narrower receive pulse-shaping filter for receiving downlink signals when it is receiving service from the femtocell base station. The mobile station may utilize the standard transmit pulse-shaping filter for transmitting uplink signals and the standard receive pulse-shaping filter for receiving downlink signals when it is receiving service from a macrocell base station.

Description

For the femto cell base station of network and the self adaptation of mobile radio station transmitting (TX)/reception (RX) pulse shaping filter
Related application
The application is involved on August 20th, 2008 that submit, name and is called the U.S. Patent application No.61/090 of " Adaptive Transmission (Tx)/Reception (Rx) Pulse Shaping Filter For Access Point Base Stations AndMobile Stations Within A Network ", 569 and require the priority of this patent application, with way of reference, this patent application is incorporated to herein.
Technical field
Present disclosure relates generally to communication system.More specifically, present disclosure relates to for the femto cell base station of network and the self adaptation of mobile radio station transmitting (Tx)/reception (Rx) pulse shaping filter.
Background technology
Wireless communication system has become the important means that many people communicate in the world.Wireless communication system can provide communication for a plurality of mobile radio stations, and wherein each mobile radio station can be served by base station.
As used herein, term " mobile radio station " refers to can be for the electronic equipment of the voice in wireless communication system and/or data communication.The example of mobile radio station comprises cell phone, personal digital assistant (PDA), radio modem, laptop computer etc.Alternatively, mobile radio station can be called as access terminal, other term of mobile terminal, subscriber station, distant station, user terminal, terminal, subscriber unit, mobile device, wireless device, user's set or certain.
Term " base station " refers to and is arranged on fixed position and the wireless communications station for communicating with mobile radio station.Alternatively, base station can be called as access point, Node B, enode b or certain other similar term.
Mobile radio station can communicate via the transmission on up link and down link and one or more base station.Up link (or reverse link) refers to the communication link from mobile radio station to base station, and down link (or forward link) refers to the communication link from base station to mobile radio station.
Femto cell base station is little cellular basestation, is generally designed to use in house or little business environment.Femto cell base station is connected to service provider network via broadband (such as DSL or cable).Femto cell base station allows service supplier in indoor expansion service coverage, is especially accessing limited or unavailable place.Alternatively, femto cell base station can be called as access point base station, home node-b (HNB), family's enode b (HeNB), femto nodes etc.
The overlay area of femto cell base station can be called to Femto cell in this article.The overlay area of general base station can be called to macrocell in this article, and general base station can be called to macro cell base station in this article.
Adjacent channel interference is the interference that the excess power of the signal in adjacent channel causes.Adjacent channel interference can occur between two mobile radio stations, and one of them mobile radio station receives the service from femto cell base station, and another mobile radio station receives the service from macro cell base station, and wherein these two mobile radio stations operate on contiguous carrier wave.Present disclosure relates to and reduces adjacent channel interference, especially at interference channel, relates in the situation of femto cell base station and macro cell base station.
Accompanying drawing explanation
Fig. 1 shows the wireless communication system that is configured to support a plurality of users;
Fig. 2 shows the wireless communication system that comprises femto cell base station and macro cell base station;
Fig. 3 shows the wireless communication system that comprises the first mobile radio station and the second mobile radio station, therein adjacent channel interference may occur;
Fig. 4 shows the transmitter and receiver in wireless communication system;
Fig. 5 and Fig. 6 show a kind of system, and in this system, femto cell base station is used narrow transmitted pulse shaping filter, and macro cell base station in this system is used standard emission pulse shaping filter;
Fig. 7 shows a kind of method, when the mobile radio station in the system of Fig. 5 and Fig. 6 detects the switching occurring from macro cell base station to femto cell base station, can carry out the method by this mobile radio station;
Fig. 8 shows a kind of method, when the mobile radio station in the system of Fig. 5 and Fig. 6 detects the switching occurring from femto cell base station to macro cell base station, can carry out the method by this mobile radio station;
Fig. 9 shows the functional module square frame corresponding with method in Fig. 7;
Figure 10 shows the functional module square frame corresponding with method in Fig. 8;
Figure 11 shows another kind of system, in this system, femto cell base station is used narrow transmitted pulse shaping filter, and macro cell base station in this system is used standard emission pulse shaping filter, and the first mobile radio station and the second mobile radio station are all positioned at Femto cell in this system; And
Figure 12 shows some assembly that can be included in wireless device.
Embodiment
The application discloses a kind of femto cell base station that is arranged to restriction adjacent channel interference.This femto cell base station comprises for send the transmitter of down link signal to the first mobile radio station.This first mobile radio station is positioned at Femto cell.This femto cell base station also comprises narrow transmitted pulse shaping filter.This narrow transmitted pulse shaping filter is configured to make the bandwidth of the down link signal that sent by femto cell base station to be less than the bandwidth of the down link signal being sent to the second mobile radio station by macro cell base station.
This femto cell base station can also comprise for receiving the receiver from the uplink signal of the first mobile radio station.This femto cell base station can also comprise the narrow received pulse shaping filter that the narrow transmitted pulse shaping filter with the first mobile radio station place matches.The narrow transmitted pulse shaping filter at the first mobile radio station place can be configured to make the bandwidth of the uplink signal that sent by the first mobile radio station to be less than the bandwidth of the uplink signal being sent to macro cell base station by the second mobile radio station.
As mentioned, this femto cell base station comprises narrow transmitted pulse shaping filter.The narrow received pulse shaping filter at the first mobile radio station place can match with the narrow transmitted pulse shaping filter at this femto cell base station place.
Macro cell base station can cover macrocell.Femto cell can be positioned at macrocell.The second mobile radio station also can be positioned at Femto cell.
The application discloses a kind of mobile radio station that is arranged to restriction adjacent channel interference.This mobile radio station comprises for sending the transmitter of uplink signal.This mobile radio station also comprises the transmitted pulse shaping filter of the bandwidth of the uplink signal that restriction is sent by mobile radio station.Mobile radio station also comprises narrow transmitted pulse shaping filter, and the degree of the bandwidth of the uplink signal that its restriction is sent by mobile radio station is greater than transmitted pulse shaping filter.
This mobile radio station can also comprise the handover mechanism switching between transmitted pulse shaping filter and narrow transmitted pulse shaping filter.For example, handover mechanism can be configured to the switching from macro cell base station to femto cell base station to have occurred and be switched to narrow transmitted pulse shaping filter from transmitted pulse shaping filter in response to detecting.This handover mechanism can be configured to the switching from femto cell base station to macro cell base station to have occurred and be switched to transmitted pulse shaping filter from narrow transmitted pulse shaping filter in response to detecting.Certainly, in the scope of present disclosure, other handover mechanism is also possible.
Mobile radio station can also comprise the receiver for receiving downlink signal.Mobile radio station can also comprise the received pulse shaping filter that the transmitted pulse shaping filter with macro cell base station place matches.Mobile radio station can also comprise the narrow received pulse shaping filter that the narrow transmitted pulse shaping filter with femto cell base station place matches.Mobile radio station can also comprise the handover mechanism switching between received pulse shaping filter and narrow received pulse shaping filter.For example, handover mechanism can be configured to the switching from macro cell base station to femto cell base station to have occurred and be switched to narrow received pulse shaping filter from received pulse shaping filter in response to detecting.This handover mechanism can be configured to the switching from femto cell base station to macro cell base station to have occurred and be switched to received pulse shaping filter from narrow received pulse shaping filter in response to detecting.Certainly, in the scope of present disclosure, other handover mechanism is also possible.
The application discloses a kind of for for receiving that signal increases signal to noise ratio (SNR) and for limiting the method for contiguous uplink channel interference.The method is carried out by mobile radio station.The method comprises that the switching from macro cell base station to femto cell base station has occurred in detection.The method also comprises from received pulse shaping filter and is switched to narrow received pulse shaping filter.The method also comprises with narrow received pulse shaping filter and receives the downlink transmission from femto cell base station.
The method can also comprise from transmitted pulse shaping filter and is switched to narrow transmitted pulse shaping filter.The method can also comprise with narrow transmitted pulse shaping filter to send ul transmissions to femto cell base station.
The method can also comprise that the switching from femto cell base station to macro cell base station has occurred in detection.The method can also comprise from narrow received pulse shaping filter and is switched to received pulse shaping filter.The method can also comprise with received pulse shaping filter and receives the downlink transmission from macro cell base station.The method can also comprise from narrow transmitted pulse shaping filter and is switched to transmitted pulse shaping filter.The method can also comprise with transmitted pulse shaping filter to send ul transmissions to macro cell base station.
The application discloses a kind of being configured to increases the device of signal to noise ratio (SNR) and the contiguous uplink channel interference of restriction for receiving signal.This device comprises for detection of the module that the switching from macro cell base station to femto cell base station has occurred.This device also comprises for be switched to the module of narrow received pulse shaping filter from received pulse shaping filter.This device also comprises for receiving the module from the downlink transmission of femto cell base station with narrow received pulse shaping filter.
The application discloses a kind of for for receiving that signal increases signal to noise ratio (SNR) and for limiting the computer program of contiguous uplink channel interference.This computer program comprises the computer-readable medium on it with instruction.This instruction comprises for detection of the code that the switching from macro cell base station to femto cell base station has occurred.This instruction also comprises for be switched to the code of narrow received pulse shaping filter from received pulse shaping filter.This instruction also comprises for receiving the code from the downlink transmission of femto cell base station with narrow received pulse shaping filter.
Fig. 1 shows the wireless communication system 100 that is configured to support a plurality of users.System 100 is that a plurality of macrocells 102 (for example, macrocell 102a-c) provide communication, for example, by corresponding macro cell base station (BS) 104 (, macrocell BS 104a-c), is wherein each macrocell 102 service.Mobile radio station 106 (for example, mobile radio station 106a-n) can be distributed in along with the time on each position of whole system 100.For example, depend on whether mobile radio station (MS) 106 enlivens and whether in soft handover, each MS 106 can communicate with one or more macro cell base station 104 at given time on up link and/or down link.Wireless communication system 100 can provide service on large geographic area.
Fig. 2 shows the wireless communication system 200 that comprises Femto cell BS 210 and macrocell BS 204.The overlay area of Femto cell BS 210 can be called as Femto cell 208, and the overlay area of macrocell BS 204 can be called as macrocell 202 in this article.Macrocell 202 can significantly be greater than Femto cell 208.For example, the radius of macrocell 202 can be the order of magnitude of several kms, and Femto cell 208 can cover family or Minor Construction thing.Femto cell 208 can be regarded as being positioned at the little independently overlay area of macrocell 202.
Femto cell BS 210 can be coupled to wide area network 218 (for example, internet) and mobile operator core net 216 via DSL router, cable modem, wireless link or other link block.Macrocell BS 204 also can be coupled to core net 216.
MS 206 can receive the service from Femto cell BS 210, and it can also receive the service from macrocell BS 204.For example, when MS 206 is positioned at Femto cell 208, Femto cell BS 210 can provide service to MS 206.Outside MS 206 moves to Femto cell 208 but still while being positioned at macrocell 202, macrocell BS 204 can provide service to MS 206.
Fig. 3 shows wireless communication system 300, and in this wireless communication system, a MS 306a and the 2nd MS 306b are positioned at Femto cell 308, and wherein Femto cell 308 is positioned at macrocell 302.The one MS 306a receives the service from Femto cell BS 310.The one MS 306a sends data to Femto cell BS 310 via up link 312a, and receives the data from Femto cell BS 310 via down link 314a.Yet 308, the two MS 306b receive the service from macrocell BS 304 although the 2nd MS 306b is positioned at Femto cell.For example, Femto cell BS 310 can be positioned at individual family, and the 2nd MS 306b can belong to this individual family of access but the not authorized someone who receives from the service of Femto cell BS 310.The 2nd MS 306b sends data to macrocell BS 304 via up link 312b, and receives the data from macrocell BS 304 via down link 314b.
The 2nd MS 306b can be in approaching the position of Femto cell BS 310 relatively.Therefore, can the transmission from the 2nd MS 306b to macrocell BS 304 on the Femto cell BS 310 receiving uplink 312b of place, therefore, the upper transmission from the 2nd MS 306b to macrocell BS 304 of this up link 312b can with up link 312a from a MS 306a, to the transmission of Femto cell BS 310, disturb mutually.If adjacent carriers, for up link 312a, 312b, can be called this interference contiguous uplink channel interference.
Similarly, can the transmission from Femto cell BS 310 to a MS 306a on the 2nd receiving downlink 314a of MS 306b place, therefore, the upper transmission from Femto cell BS 310 to a MS 306a of this down link 314a can with down link 314b from macrocell BS 304, to the transmission of the 2nd MS 306b, disturb mutually.If for down link 314a, 314b, can being called this interference contiguous downlink channel, adjacent carriers disturbs.
Although the 2nd MS 306b is positioned at Femto cell 308 in Fig. 3, even if the 2nd MS306b is positioned at outside Femto cell 308, still can there is contiguous uplink channel interference and contiguous downlink channel interference.No matter the 2nd MS 306b is positioned within Femto cell 308 or outside, all can use method disclosed herein.
Fig. 4 shows transmitter 420 and the receiver 422 in wireless communication system 400.Transmitter 420 is accepted numerical data, is modulated radio frequency (RF) signal, and this signal is sent to receiver 422 by this digital data conversion.Receiver 422 receives these RF signals, and by its demodulation to reproduce this data.
The numerical data that offers transmitter 420 can be modulated according to certain modulation format by modulator 424, to produce the modulated sample sequence that represents symbol.This modulated sampling can be by 426 filtering of transmitter (Tx) pulse shaping filter, to produce filtering sampling sequence.Tx pulse shaping filter 426 is digital filters, and it may be implemented as finite impulse response (FIR) (FIR) filter.
Tx front end 428 can be processed the output of Tx pulse shaping filter 426.Tx front end 428 can be carried out the function such as interpolation, predistortion and/or other filtering operation.Filtering sampling can be offered to digital-analog convertor (DAC) 430, this transducer produces in its input and represents modulated and the analog signal of filtering sampling sequence.Then, can this analog signal be upconverted to suitable radio frequency by upconverter (UC) 432, and by power amplifier (PA) 434, this analog signal be amplified.Then, can send this RF signal via transmitting antenna 436.
Reception antenna 438 can receive sent signal, and this signal is offered to low-converter 440, this low-converter by this signal from radio frequency down-conversion to suitable intermediate frequency (IF) or base-band analog signal.Can be by analogue-to-digital converters (ADC) 442 by this analog signal figure, this transducer produces digitized sampling sequence.Can process this digitized sampling by receiver (Rx) front end 444, this receiver front end can be carried out such as the function of selecting, automatic gain is controlled (AGC) and/or the operation of other adaptive-filtering.Then, can carry out filtering by 446 pairs of these samplings of Rx pulse shaping filter.Rx pulse shaping filter 446 is digital filters, and it may be implemented as FIR filter.Can carry out demodulation by the sampling of 448 pairs of Rx pulse shaping filter 446 outputs of demodulator, this demodulator reproduces and exports the data that offer transmitter 420.
The spectral response of Tx pulse shaping filter 426 and Rx pulse shaping filter 446 can have significant impact to the performance of communication system 400.For example, the spectral bandwidth that Tx pulse shaping filter 426 restriction transmits, this spectral bandwidth has been determined adjacent channel interference and the grade of other parasitic radiation of being generated by transmitter 420 conventionally.When transmitter 420 is observed specific communication standard, in this standard, conventionally by the spectral mask that should not be exceeded, specify the bandwidth transmitting.
Tx pulse shaping filter 426 and Rx pulse shaping filter 446 should match each other.For example, Tx pulse shaping filter 426 and Rx pulse shaping filter 446 can be embodied as to each that make in them and there is root raised cosine (RRC) response, and to make the spectral response of their combinations be raised cosine (RC) spectral response.Certainly, only as an example, provide RRC; Not Tx pulse shaping filter 426 and Rx pulse shaping filter 446 must be embodied as to each that make in them to there is RRC response.Yet they should have identical response, thereby Rx pulse shaping filter 446 and Tx pulse shaping filter 426 are matched, so that signal to noise ratio (SNR) maximizes.
Each in Femto cell BS 310 in the system 300 of Fig. 3, macrocell BS 304 and MS 306a, 306b can comprise and is configured to the transmitter and receiver similar with receiver 422 to the transmitter 420 shown in Fig. 4.
Fig. 5 and Fig. 6 show a possible method of the adjacent channel interference type for reducing to describe in conjunction with Fig. 3 above.Method shown in utilization, the Femto cell BS510 in wireless communication system 500 is used narrow Tx pulse shaping filter 550a, and macrocell BS in system 500 504 is used standard Tx pulse shaping filter 526a.Term in this context " narrow " means that the degree of the spectral bandwidth of the down link 514a signal that the Tx pulse shaping filter 550a restriction used by Femto cell BS 510 is sent by Femto cell BS 510 is greater than the degree of the spectral bandwidth of the down link 514b signal that Tx pulse shaping filter 526a restriction sends by macrocell BS 504.For example, in a kind of possible implementation, the three dB bandwidth of narrow Tx pulse shaping filter 550a can be standard Tx pulse shaping filter 526a three dB bandwidth 90%.Yet, this value is only provided as an example, and should be by this value for not limiting the protection range of present disclosure.
MS 506 in system 500 comprises the narrow Rx pulse shaping filter 552b that the narrow Tx pulse shaping filter 550a with Femto cell BS 510 matches, and the standard Rx pulse shaping filter 546b matching with the standard Tx pulse shaping filter 526a of macrocell BS 504.
MS 506 comprises narrow Tx pulse shaping filter 550b and standard Tx pulse shaping filter 526b.The degree of the spectral bandwidth of the up link 512a signal that narrow Tx pulse shaping filter 550b restriction is sent by MS 506 is greater than the degree that standard Tx pulse shaping filter 526b limits the spectral bandwidth of the up link 512b signal being sent by MS 506.Femto cell BS 510 comprises the narrow Rx pulse shaping filter 552a that the narrow Tx pulse shaping filter 550b with MS 506 matches.Macrocell BS 504 comprises the standard Rx pulse shaping filter 546a that the standard Rx pulse shaping filter 546b with MS 506 matches.
MS 506 can operate at least two kinds of different configurations.In the first configuration, MS506 is used narrow Tx pulse shaping filter 550b and narrow Rx pulse shaping filter 552b.In the second configuration, MS 506 is used standard Tx pulse shaping filter 526b and standard Rx pulse shaping filter 546b.This MS 506 also comprises the handover mechanism 554 switching between the first configuration and the second configuration.
Fig. 5 shows the MS 506 that is positioned at Femto cell 508.MS 506 communicates via up link 512a and down link 514a and Femto cell BS 510.This MS 506 is in above-mentioned the first configuration, that is, it uses narrow Tx pulse shaping filter 550b (it matches with the narrow Rx pulse shaping filter 552a that Femto cell BS 510 is used) and narrow Rx pulse shaping filter 552b (it mates with the narrow Tx pulse shaping filter 550a that Femto cell BS 510 is used).
Fig. 6 shows the MS 506 that is positioned at Femto cell 508 outward but still is positioned at macrocell 502.MS 506 is via up link 512b and down link 514b and communicate with macrocell BS 504.MS 506 is in above-mentioned the second configuration, that is, it uses standard Tx pulse shaping filter 526b (the standard Rx pulse shaping filter 546a that itself and macrocell BS 504 are used matches) and standard Rx pulse shaping filter 546b (the standard Tx pulse shaping filter 526a that itself and macrocell BS 504 are used matches).
More specifically, with reference to Fig. 7, when MS 506 detect 756 to occurred from macrocell BS 504 to Femto cell BS 510 switching time, MS 506 can switch 758 to narrow Tx pulse shaping filter 550b and switch 760 and arrive narrow Rx pulse shaping filter 552b.Then, MS 506 can be used 762 narrow Tx pulse shaping filter 550b to Femto cell BS510, to send transmission on up link 512a, and uses 764 narrow Rx pulse shaping filter 552b on down link 514a, to receive the transmission from Femto cell BS 510.
Referring now to Fig. 8, when MS 506 detect 866 to occurred from Femto cell BS 510 to macrocell BS 504 switching time, MS 506 can switch 868 to standard Tx pulse shaping filter 526b and switch 870 and arrive standard Rx pulse shaping filter 546b.Then, MS 506 can be used 872 standard Tx pulse shaping filter 526b to macrocell BS 504, to send transmission on up link 512b, and uses 874 standard Rx pulse shaping filter 546b on down link 514b, to receive the transmission from macrocell BS 504.
In superincumbent discussion, suppose that it is to serve by macrocell BS 504 or by Femto cell BS 510 that MS 506 detects it, and MS 506 automatically switches to suitable pulse shaping filter.Alternatively, or additionally, when MS 506 is during by Femto cell BS 510 service, Femto cell BS 510 can order MS 506 to switch to narrow Tx pulse shaping filter 550b and narrow Rx pulse shaping filter 552b.
Various hardware that can be corresponding by the functional module square frame 900 with shown in Fig. 9 and/or component software and/or module are carried out the method 700 of above-described Fig. 7.In other words, the square frame shown in Fig. 7 756 to 764 is corresponding to the functional module square frame 956 to 964 shown in Fig. 9.
Similarly, various hardware that can be corresponding by the functional module square frame 1000 with shown in Figure 10 and/or component software and/or module are carried out the method 800 of above-described Fig. 8.In other words, the square frame shown in Fig. 8 866 to 874 is corresponding to the functional module square frame 1066 to 1074 shown in Figure 10.
Figure 11 shows and is combined the similar system 1100 of system 300 that Fig. 3 discusses above.Particularly, Figure 11 shows system 1100, and wherein a MS 1106a and the 2nd MS 1106b are positioned at Femto cell 1108, and this Femto cell 1108 is positioned at macrocell 1102.The system 300 that Fig. 3 discusses is similar with being combined above, and a MS 1106a receives the service from Femto cell BS 1110.The one MS 1106a sends data via up link 1112a to Femto cell BS 1110, and receives the data from Femto cell BS 1110 via down link 1114a.Although the 2nd MS1106b is positioned at Femto cell, 1108, the two MS 1106b receive the service from macrocell BS 1104.The 2nd MS 1106b sends data via up link 1112b to macrocell BS 1104, and receives the data from macrocell BS 1104 via down link 1114b.
In the system 300 of discussing in conjunction with Fig. 3 in the above, each in Femto cell BS 310, macrocell BS 304 and MS 306a, 306b is all used identical Tx pulse shaping filter 426 and identical Rx pulse shaping filter 446.On the contrary, in the system 1100 shown in Figure 11, Femto cell BS 1110, macrocell BS 1104 and MS 1106a, 1106b are not used identical Tx pulse shaping filter and identical Rx pulse shaping filter.
Femto cell BS 1110 is used narrow Tx pulse shaping filter 1150a, and macrocell BS1104 is used standard Tx pulse shaping filter 1126a.The degree of the spectral bandwidth of the down link 1114a signal that narrow Tx pulse shaping filter 1150a restriction is sent by Femto cell BS 1110 is greater than standard Tx pulse shaping filter 1126a restriction by the degree of the spectral bandwidth of the down link 1114b signal of macrocell BS 1104 transmissions.The one MS 1106a comprises the narrow Rx pulse shaping filter 1152b that the narrow Tx pulse shaping filter 1150a with Femto cell BS 1110 matches (using when being positioned at Femto cell 1108 at a MS 1106a and receiving the service from Femto cell BS 1110), and the standard Rx pulse shaping filter 1146b matching with the standard Tx pulse shaping filter 1126a of macrocell BS 1104 while being positioned at macrocell 1102 and reception from the service of macrocell BS 1104 (for being positioned at a MS 1106a but still use) the Femto cell 1108 outside.The 2nd MS 1106b comprises the standard Rx pulse shaping filter 1146b ' that the standard Tx pulse shaping filter 1126a with macrocell BS 1104 matches.
The one MS 1106a is used narrow Tx pulse shaping filter 1150b (using when being positioned at Femto cell 1108 at a MS 1106a and receiving the service from Femto cell BS 1110) and standard Tx pulse shaping filter 1126b while being positioned at macrocell 1102 and reception from the service of macrocell BS 1104 (for being positioned at a MS 1106a outside Femto cell 1108 but still use).The 2nd MS 1106b comprises standard Tx pulse shaping filter 1126b '.The degree of the spectral bandwidth of the up link 1112a signal that narrow Tx pulse shaping filter 1150b restriction is sent by a MS 1106a is greater than standard Tx pulse shaping filter 1126b restriction by the degree of the spectral bandwidth of the uplink signal of a MS 1106a transmission, or is greater than the degree that standard Tx pulse shaping filter 1126b ' limits the spectral bandwidth of the up link 1112b signal being sent by the 2nd MS 1106b.Femto cell BS 1110 comprises the narrow Rx pulse shaping filter 1152a that the narrow Tx pulse shaping filter 1150b with a MS 1106a matches.Macrocell BS 1104 comprises the standard Rx pulse shaping filter 1146a matching with the standard Tx pulse shaping filter 1126b of a MS 1106a and the standard Tx pulse shaping filter 1126b ' of the 2nd MS 1106b.
System 300, the two MS 1106b that describe as above-mentioned combination Fig. 3 can be in approaching the position of Femto cell BS 1110 relatively.Therefore, can the transmission from the 2nd MS 1106b to macrocell BS 1104 on the Femto cell BS 1110 receiving uplink 1112b of place, therefore, the upper transmission from the 2nd MS 1106b to macrocell BS 1104 of this up link 1112b and up link 1112a, from a MS 1106a, to the transmission of Femto cell BS 1110, disturb mutually.If adjacent carriers, for up link 1112a, 1112b, can be called this interference contiguous uplink channel interference.Yet because a MS 1106a is used narrow Tx pulse shaping filter 1150b, the contiguous uplink channel interference occurring in the system 1100 of Figure 11 can significantly be less than the contiguous uplink channel interference occurring in the system 300 of Fig. 3.In addition, Femto cell BS 1110 is used narrow Rx pulse shaping filter 1152a, thereby has increased signal to noise ratio (SNR) for receiving signal.
Similarly, can the transmission from Femto cell BS 1110 to a MS 1106a on the 2nd receiving downlink 1114a of MS 1106b place, therefore, the upper transmission from Femto cell BS 1110 to a MS 1106a of this down link 1114a can with down link 1114b from the transmission of macrocell BS1104 to the two MS 1106b, disturb mutually.If for down link 1114a, 1114b, can being called this interference contiguous downlink channel, adjacent carriers disturbs.Yet because Femto cell BS 1110 is used narrow Tx pulse shaping filter 1150a, the contiguous downlink channel interference occurring in the system 1100 of Figure 11 can significantly be less than the contiguous downlink channel occurring in the system 300 of Fig. 3 and disturb.In addition, a MS 1106a is used narrow Rx pulse shaping filter 1152b, thereby has increased SNR for receiving signal.
Figure 12 shows some assembly that can be included in wireless device 1201.Wireless device 1201 can be mobile radio station or base station.
Wireless device 1201 comprises processor 1203.Processor 1203 can be general purpose single-chip or multi-chip microprocessor (for example, ARM), special microprocessor (for example, digital signal processor (DSP)), microcontroller, programmable gate array etc.Processor 1203 can be called as CPU (CPU).For example, although only show single processor 1203 in the wireless device 1201 of Figure 12, in interchangeable configuration, can use the combination (, ARM and DSP) of processor.
Wireless device 1201 also comprises memory 1205.Memory 1205 can be can storage of electronic information any electronic building brick.Memory 1205 can be presented as flash memory device in random access memory (RAM), read-only memory (ROM), magnetic disk storage medium, optical storage media, RAM, be included in memory, eprom memory, eeprom memory, register etc. on the plate in processor, also can be presented as above-mentioned combination.
Data 1207 and instruction 1209 can be stored in memory 1205.Can carry out instruction 1209 to realize method described herein by processor 1203.Execution instruction 1209 can relate to use and be stored in the data 1207 in memory 1205.A certain amount of data 1207a and instruction 1209a can be downloaded in processor 1203.
Wireless device 1201 can also comprise transmitter 1211 and receiver 1213, to allow sending and receiving signal between wireless device 1201 and remote location.Transmitter 1211 and receiver 1213 can be generically and collectively referred to as to transceiver 1215.
If wireless device 1201 is mobile radio stations 506, transmitter 1211 can comprise narrow Tx pulse shaping filter 550b and standard Tx pulse shaping filter 526b, and receiver 1213 can comprise narrow Rx pulse shaping filter 552b and standard Rx pulse shaping filter 546b.If wireless device 1201 is femto cell base stations 510, transmitter 1211 can comprise narrow Tx pulse shaping filter 550a, and receiver 1213 can comprise narrow Rx pulse shaping filter 552a.If wireless device 1201 is macro cell base station 504, transmitter 1211 can comprise standard Tx pulse shaping filter 526a, and receiver 1213 can comprise standard Rx pulse shaping filter 546a.
Antenna 1217 can be electrically coupled to transceiver 1215.Wireless device 1201 can also comprise a plurality of transmitters of (not shown), a plurality of receiver, a plurality of transceiver and/or a plurality of antenna.
Each assembly of wireless device 1201 can be coupled by one or more buses, and these one or more buses can comprise power bus, control signal bus, status signal bus in addition, data/address bus etc.For clear, in Figure 12, various buses are depicted as to bus system 1219.
Term " processor " should be widely interpreted as comprising general processor, CPU (CPU), microprocessor, digital signal processor (DSP), controller, microcontroller, state machine etc.In some cases, " processor " can refer to application-specific integrated circuit (ASIC) (ASIC), programmable logic device (PLD), field programmable gate array (FPGA) etc.Term " processor " can refer to the combination for the treatment of facility, for example combination of DSP and microprocessor, multi-microprocessor, one or more microprocessors of being combined with DSP kernel or other this configuration arbitrarily.
Term " memory " should be widely interpreted be comprise can storage of electronic information any electronic building brick.Term memory can refer to various types of processor readable mediums, such as random access memory (RAM), read-only memory (ROM), nonvolatile RAM (NVRAM), programmable read only memory (PROM), Erasable Programmable Read Only Memory EPROM (EPROM), electric erasable PROM (EEPROM), flash memory, magnetic or optical data storage unit, register etc.If processor can, from memory reading information and/or to memory writing information, be called this memory with processor and carry out electronic communication.The memory and the processor that are integrated in processor carry out electronic communication.
It is the computer-readable statement that comprises any type that term " instruction " and " code " should be widely interpreted.For example, term " instruction " and " code " can refer to one or more programs, routine, subroutine, function, process etc." instruction " and " code " can comprise single computer-readable statement or a plurality of computer-readable statement.
Function described herein can realize in hardware, software, firmware or its combination in any.If realize in software, these functions can be stored on computer-readable medium as one or more instructions.Term " computer-readable medium " refers to can be by any usable medium of computer access.For example and without limitation, computer-readable medium can comprise RAM, ROM, EEPROM, CD-ROM or other optical disc memory apparatus, disk storage device or other magnetic storage apparatus or can be for carry or store required program code and can be by any other medium of computer access with instruction or data structure form.The disk using herein and CD comprise compact disk (CD), laser disk, optical disc, digital versatile disc (DVD), floppy disk and dish, disk rendering data magnetically conventionally wherein, and cd-rom using laser optics ground rendering data.
Also can on transmission medium, send software or instruction.For example, if use coaxial cable, fiber optic cables, twisted-pair feeder, Digital Subscriber Line (DSL) or such as the wireless technology of infrared ray, radio and microwave come from website, server or other remote source send software, this coaxial cable, fiber optic cables, twisted-pair feeder, DSL or include in the definition of transmission medium such as the wireless technology of infrared ray, radio and microwave.
Method disclosed herein comprises for realizing one or more steps or the action of described method.In the situation that do not deviate from the protection range of claim, the method step and/or action can exchange each other.In other words, unless the proper operation of institute's describing method requires step or the action of particular order, otherwise in the situation that do not deviate from the protection range of claim, can modify to the order of particular step and/or action and/or use.
In addition, should be appreciated that and can and/or obtain for carrying out device and/or other suitable module of method described herein and technology, all those square frames as shown in Figures 7 and 8 by device downloads.For example, can be by device coupled to server to contribute to for carrying out the transfer of the module of method described herein.Alternatively, can be via memory module (for example, random access memory (RAM), read-only memory (ROM), such as the physical storage medium of compact disk (CD) or floppy disk etc.) the whole bag of tricks described herein is provided, once make memory module to be coupled to or to be offered equipment, this equipment can obtain the whole bag of tricks.In addition, can use any other suitable technology that method described herein and technology are provided to equipment.
Be appreciated that accurate configuration and the assembly of claim shown in being not limited to above.In the situation that do not deviate from the protection range of claim, can carry out various modifications, change and distortion to the arrangement of system described herein, method and apparatus, operation and details.

Claims (18)

1. a mobile radio station that is arranged to restriction adjacent channel interference, comprising:
Transmitter, for sending uplink signal;
Transmitted pulse shaping filter, the bandwidth of the described uplink signal that its restriction is sent by described mobile radio station;
Narrow transmitted pulse shaping filter, the degree of the described bandwidth of the described uplink signal that its restriction is sent by described mobile radio station is greater than described transmitted pulse shaping filter; And
Handover mechanism, for switching between described transmitted pulse shaping filter and described narrow transmitted pulse shaping filter, wherein, described handover mechanism is configured to the switching from macro cell base station to femto cell base station has occurred and be switched to described narrow transmitted pulse shaping filter from described transmitted pulse shaping filter in response to detecting.
2. mobile radio station as claimed in claim 1, wherein, described handover mechanism is configured to the switching from femto cell base station to macro cell base station has occurred and be switched to described transmitted pulse shaping filter from described narrow transmitted pulse shaping filter in response to detecting.
3. mobile radio station as claimed in claim 1, also comprises:
Receiver, for receiving downlink signal;
Received pulse shaping filter, the transmitted pulse shaping filter at itself and macro cell base station place matches; And
Narrow received pulse shaping filter, the narrow transmitted pulse shaping filter at itself and femto cell base station place matches.
4. mobile radio station as claimed in claim 3, also comprises: handover mechanism, and for switching between described received pulse shaping filter and described narrow received pulse shaping filter.
5. mobile radio station as claimed in claim 4, wherein, described handover mechanism is configured to the switching from described macro cell base station to described femto cell base station has occurred and be switched to described narrow received pulse shaping filter from described received pulse shaping filter in response to detecting.
6. mobile radio station as claimed in claim 4, wherein, described handover mechanism is configured to the switching from described femto cell base station to described macro cell base station has occurred and be switched to described received pulse shaping filter from described narrow received pulse shaping filter in response to detecting.
7. for for receiving, signal increases signal to noise ratio (SNR) and for limiting a method for adjacent channel interference, described method is carried out by mobile radio station, described method comprises:
There is the switching from macro cell base station to femto cell base station in detection;
From received pulse shaping filter, be switched to narrow received pulse shaping filter; And
With described narrow received pulse shaping filter, receive the downlink transmission from described femto cell base station.
8. method as claimed in claim 7, wherein, the narrow transmitted pulse shaping filter at described narrow received pulse shaping filter and described femto cell base station place matches.
9. method as claimed in claim 7, also comprises:
From transmitted pulse shaping filter, be switched to narrow transmitted pulse shaping filter; And
With described narrow transmitted pulse shaping filter, come to send ul transmissions to described femto cell base station.
10. method as claimed in claim 9, wherein, the degree that described narrow transmitted pulse shaping filter limits the bandwidth of described ul transmissions is greater than described transmitted pulse shaping filter.
11. methods as claimed in claim 7, also comprise:
There is the switching from described femto cell base station to described macro cell base station in detection;
From described narrow received pulse shaping filter, be switched to described received pulse shaping filter; And
With described received pulse shaping filter, receive the downlink transmission from described macro cell base station.
12. methods as claimed in claim 11, also comprise:
From narrow transmitted pulse shaping filter, be switched to transmitted pulse shaping filter; And
With described transmitted pulse shaping filter, come to send ul transmissions to described macro cell base station.
13. 1 kinds are configured to increase the device of signal to noise ratio (SNR) and restriction adjacent channel interference for receiving signal, comprise:
For detection of the module that the switching from macro cell base station to femto cell base station has occurred;
For be switched to the module of narrow received pulse shaping filter from received pulse shaping filter; And
For receiving the module from the downlink transmission of described femto cell base station with described narrow received pulse shaping filter.
14. devices as claimed in claim 13, wherein, the narrow transmitted pulse shaping filter at described narrow received pulse shaping filter and described femto cell base station place matches.
15. devices as claimed in claim 13, also comprise:
For be switched to the module of narrow transmitted pulse shaping filter from transmitted pulse shaping filter; And
For carry out to send to described femto cell base station the module of ul transmissions with described narrow transmitted pulse shaping filter.
16. devices as claimed in claim 15, wherein, the degree that described narrow transmitted pulse shaping filter limits the bandwidth of described ul transmissions is greater than described transmitted pulse shaping filter.
17. devices as claimed in claim 13, also comprise:
For detection of the module that the switching from described femto cell base station to described macro cell base station has occurred;
For be switched to the module of described received pulse shaping filter from described narrow received pulse shaping filter; And
For receiving the module from the downlink transmission of described macro cell base station with described received pulse shaping filter.
18. devices as claimed in claim 17, also comprise:
For be switched to the module of transmitted pulse shaping filter from narrow transmitted pulse shaping filter; And
For carry out to send to described macro cell base station the module of ul transmissions with described transmitted pulse shaping filter.
CN200980137272.3A 2009-08-11 2009-10-06 Adaptive transmission (TX)/reception (RX) pulse shaping filter for femtocell base stations and mobile stations within a network Expired - Fee Related CN102165742B (en)

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PCT/US2009/059734 WO2010022407A2 (en) 2008-08-20 2009-10-06 Adaptive transmission (tx)/reception (rx) pulse shaping filter for femtocell base stations and mobile stations within a network

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US7142613B2 (en) 2002-03-28 2006-11-28 The Governors Of The University Of Alberta Methods, systems and devices for generating pulse shapes
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US20080031377A1 (en) * 2006-08-03 2008-02-07 M/A-Com, Inc. Method and system for data transmission with decreased bit error rate
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US8948095B2 (en) * 2007-11-27 2015-02-03 Qualcomm Incorporated Interference management in a wireless communication system using frequency selective transmission
US20100002815A1 (en) * 2008-07-01 2010-01-07 Qualcomm Incorporated Dynamic filtering for adjacent channel interference suppression
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