WO2010072053A1 - 天线协作组确定方法和装置、基站协作组确定方法和装置 - Google Patents

天线协作组确定方法和装置、基站协作组确定方法和装置 Download PDF

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Publication number
WO2010072053A1
WO2010072053A1 PCT/CN2009/001549 CN2009001549W WO2010072053A1 WO 2010072053 A1 WO2010072053 A1 WO 2010072053A1 CN 2009001549 W CN2009001549 W CN 2009001549W WO 2010072053 A1 WO2010072053 A1 WO 2010072053A1
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WO
WIPO (PCT)
Prior art keywords
channel quality
mobile terminal
antenna
base station
signal
Prior art date
Application number
PCT/CN2009/001549
Other languages
English (en)
French (fr)
Inventor
王启星
姜大洁
刘光毅
Original Assignee
中国移动通信集团公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 中国移动通信集团公司 filed Critical 中国移动通信集团公司
Priority to US13/142,144 priority Critical patent/US8351955B2/en
Priority to EP09834006.0A priority patent/EP2381587B1/en
Publication of WO2010072053A1 publication Critical patent/WO2010072053A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/022Site diversity; Macro-diversity
    • H04B7/026Co-operative diversity, e.g. using fixed or mobile stations as relays
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/022Site diversity; Macro-diversity
    • H04B7/024Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0686Hybrid systems, i.e. switching and simultaneous transmission
    • H04B7/0691Hybrid systems, i.e. switching and simultaneous transmission using subgroups of transmit antennas
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0868Hybrid systems, i.e. switching and combining
    • H04B7/0874Hybrid systems, i.e. switching and combining using subgroups of receive antennas

Definitions

  • Antenna cooperative group determining method and device base station cooperation group determining method and device
  • the present invention relates to the field of mobile communications, and more particularly to techniques for reducing signal interference between adjacent cells. Background technique
  • the LTE-Advanced system adopts an orthogonal frequency division multiple access (OFDMA) access mode, because the information transmitted and received by the mobile terminal in the cell is carried on different orthogonal subcarriers, thereby avoiding the mobile terminal between the same cell.
  • OFDMA orthogonal frequency division multiple access
  • the OFDMA access method does not have the ability to suppress small-area interference. Therefore, the signal interference that affects the performance of the LTE-Advanced system mainly comes from neighboring cells, that is, signal interference between cells.
  • the broadband mobile communication system will try to capture the same frequency network when the network is deployed. In the cellular system of the same frequency network, the mobile terminal at the cell edge is more susceptible to the phase. The interference of the neighboring cell signal severely limits the quality of service and throughput of the cell edge mobile terminal.
  • the serving base station antenna of the mobile terminal 1 is the antenna 1
  • the serving base station antenna of the mobile terminal 2 is the antenna 2
  • the serving base station antenna of the mobile terminal 3 is the antenna 3, and the mobile terminals 1, 2, 3 are simultaneously
  • the frequency e.g., frequency point A
  • the antenna 1 includes a useful signal of the mobile terminal 1 in the signal received at the frequency point A, and also includes an interference signal of the mobile terminal 2 and the mobile terminal 3, that is, the signal received by the antenna 1 at the frequency point A is the signal of the mobile terminal 1.
  • the mobile terminal 2, 3 transmits a mixed signal of the signal; the same antenna 2 receives the interference signal of the mobile terminal 1 and the mobile terminal 3 in addition to the useful signal of the mobile terminal 2 at the frequency point A; the antenna 3 is at the frequency point A In addition to receiving the useful signal of the mobile terminal 3, the interference signals of the mobile terminal 1 and the mobile terminal 2 are also received. In other words, the signals transmitted by the mobile terminal 1, the mobile terminal 2, and the mobile terminal 3 can be collectively received by the antenna 1, the antenna 2, and the antenna 3.
  • the mobile terminal 1 receives the signals sent by the antenna 2 and the antenna 3 to the mobile terminals 2, 3 respectively; similarly, the mobile terminal 2 receives the useful signal of the antenna 2, And receiving the antenna 1 and the antenna 3 and transmitting to the mobile terminal 1, respectively The signal of 3; in addition to receiving the useful signal of the antenna 3, the user 3 receives the signals transmitted by the antenna 1 and the antenna 2 to the mobile terminals 1, 2, respectively.
  • the signals transmitted by the antenna 1, the antenna 2, and the antenna 3 at the frequency point A can be simultaneously received by the mobile terminal 1, the mobile terminal 2, and the mobile terminal 3.
  • the antenna 1, the antenna 2 and the antenna 3 are combined into one antenna cooperative group (as shown in FIG. 2).
  • the signal joint processing system receives the mobile cooperative group.
  • the signals of the terminals 1, 2, 3, or the signals are sent to the mobile terminals 1, 2, 3 for cooperative processing to improve the detection accuracy of the antenna to the mobile terminal signal, and the correct rate of the mobile terminal receiving antenna transmission signal.
  • the signal joint processing system of the antenna cooperative group obtains channel information between antennas and mobile terminals in the antenna cooperative group (the channel information reflects the channel quality of communication between the antenna and the mobile terminal), and adopts MIMO.
  • the technology suppresses interference signals of mobile terminals of neighboring cells from the received signals:
  • the signal joint processing system obtains the signals received by the antennas 1, 2, 3 at the frequency point A, and the channel information between the antennas 1, 2, 3 and the mobile terminals 1, 2, 3.
  • the signal joint processing system uses the MIMO technology to suppress the interference signal of the mobile terminal of the neighboring cell from the received signal according to the obtained signal and channel information, thereby detecting the actual transmission signal of the mobile terminal 1, 2, 3 (for example, by the following equation group) 1 estimated): (1)
  • P1, P2, and P3 are signals received by the antennas 1, 2, and 3 at the frequency point A;
  • Al, Bl, and CI respectively represent channel information between the antenna 1 and the mobile terminals 1, 2, and 3;
  • A2, B2, C2 denotes channel information between the antenna 2 and the mobile terminals 1, 2, 3, respectively;
  • A3, B3, C3 respectively represent channel information between the antenna 3 and the mobile terminals 1, 2, 3;
  • nl, n2, n3 respectively represent antennas 1.
  • the received noise of the antenna 2 and the antenna 3 and the interference signal of other cells; the above-mentioned equation group 1 can estimate the actual transmission signals X, Y, and ⁇ of the mobile terminals 1, 2, and 3.
  • the antenna in the antenna cooperative group performs cooperative processing on the signals transmitted to the mobile terminal: the signal joint processing system obtains the data information that needs to be transmitted to the mobile terminals 1, 2, 3, and the antennas 1, 2, 3 and the mobile terminal 1 Channel information between 2, 3, 3.
  • the signal joint processing system uses a beamforming algorithm to perform weighting processing on the data information to be transmitted to the mobile terminals 1, 2, 3 according to the obtained data information and channel information to obtain a transmission signal, and the antenna 1, 2, 3 will perform weighted calculation and transmission.
  • the signal is transmitted at frequency point A (for example, the signals transmitted by antennas 1, 2, 3 at frequency point A can be obtained by Equation 2 below):
  • Al, Bl, and CI respectively represent channel information between the mobile terminal 1 and the antennas 1, 2, and 3;
  • A2, B2, and C2 respectively represent channel information between the mobile terminal 2 and the antennas 1, 2, and 3;
  • B3 and C3 respectively represent channel information between the mobile terminal 3 and the antennas 1, 2, and 3; according to the above equation, multiple sets of R1, R2, and R3 can be solved, and one of the groups is selected as the antennas 1, 2, and 3, respectively.
  • the weighting values R1', R2', R3' of the data information that the antennas 1, 2, and 3 need to transmit to the mobile terminal 2, respectively, can be calculated; the antennas 1, 2, and 3 are respectively sent to the mobile terminal 3.
  • the interference signal received by the mobile terminal 2 from the antenna 4 is larger than that of the antenna 1, and therefore, the method according to the above-mentioned prior art antenna cooperative group can improve the partial cell edge mobile terminal (such as FIG. 3a).
  • the signal receiving detection accuracy of the mobile terminals 1 and 3) is not satisfactory, but the signal interference suppression effect is not ideal for some cell edge mobile terminals (such as the mobile terminal 2 in FIG. 3a); or, as shown in FIG.
  • the interference signal in the signal transmitted by the mobile terminal 2 received by the antenna 2 mainly comes from the mobile terminal 4, the mobile terminal 3, and not the mobile terminal 1 participating in the calculation in the signal interference as in the prior art described above, so , in the scene shown in Figure 3b
  • the effect of using the prior art method to perform interference suppression on receiving and transmitting signals by the mobile terminal 2 is also limited.
  • the prior art method for suppressing interference between cells does not effectively suppress interference between the mobile terminal and the antenna communication signal for various practical situations, so that the communication quality between the base station antenna and some cell edge mobile terminals is not It must be guaranteed.
  • the existing method of signal interference suppression between cells cannot effectively suppress the interference of the communication signals between the mobile terminal and the base station for various practical situations, so that the communication quality between the base station and some cell edge mobile terminals is improved. Not necessarily guaranteed. Summary of the invention
  • Embodiments of the present invention provide a method and apparatus for determining an antenna cooperative group, which are used to improve communication quality between a mobile terminal and a base station antenna, and in particular, improve communication quality between a cell edge mobile terminal and a base station antenna.
  • the embodiment of the present invention further provides a method and a device for determining a base station cooperative group, which are used to improve the communication quality between the mobile terminal and the base station, and in particular, improve the communication quality between the mobile terminal at the cell edge and the base station.
  • An antenna cooperation group determining method includes:
  • the signal joint processing system obtains the channel quality between the mobile terminal and the at least two antennas; and determines that the antenna corresponding to the channel quality higher than the channel quality threshold constitutes an antenna cooperative group of the mobile terminal.
  • An antenna cooperation group determining apparatus includes:
  • a channel quality obtaining module configured to obtain a channel quality between the mobile terminal and the at least two antennas
  • an antenna cooperative group determining module configured to determine an antenna group corresponding to a channel quality higher than a channel quality threshold, and form an antenna cooperative group of the mobile terminal .
  • a method for determining a base station cooperation group includes:
  • the signal joint processing system obtains channel quality between the mobile terminal and the at least two base stations; and determines a base station corresponding to the channel quality higher than the channel quality threshold to form a base station of the mobile terminal Collaboration group.
  • a base station cooperation group determining apparatus includes:
  • a channel shield obtaining module configured to obtain channel quality between the mobile terminal and the at least two base stations
  • a base station cooperative group determining module configured to determine a base station corresponding to the channel quality corresponding to the channel quality threshold, and the base station that constitutes the mobile terminal cooperates group.
  • the determined antenna cooperation group since the antenna cooperation group is dynamically determined according to the channel shield between the mobile terminal and the antenna of each base station, the determined antenna cooperation group includes an antenna (or a mobile terminal pair) that has strong interference to the mobile terminal.
  • the antenna with strong interference performs signal joint processing on these antennas, so that higher mobile terminal signal detection accuracy rate can be obtained, and the correct rate of receiving signals of the mobile terminal is improved, that is, the communication quality between the mobile terminal and the base station is improved.
  • the determined base station cooperation group since the base station cooperation group is dynamically determined according to the channel shield between the mobile terminal and each base station, the determined base station cooperation group includes the base station with strong interference to the mobile terminal.
  • the signal joint processing is performed for these base stations, so that the higher detection rate of the mobile terminal signal can be obtained, and the correct rate of the received signal of the mobile terminal is improved, that is, the mobile terminal is improved.
  • FIG. 1 is a schematic diagram of a base station antenna and a mobile terminal interfered with by a neighboring cell signal in the prior art
  • FIG. 1 is a schematic diagram of a prior art antenna cooperation group
  • 3a and 3b are schematic diagrams showing limitations of improving the communication quality between the mobile terminal and the antenna by the antenna cooperative group in the prior art
  • FIG. 4 is a schematic diagram of determining an antenna cooperation group according to an embodiment of the present invention.
  • FIG. 5 is a flow chart of a method for determining an antenna cooperation group, performing signal detection, and transmitting according to an embodiment of the present invention
  • 6, 7, and 8 are structural block diagrams of a signal joint processing system according to an embodiment of the present invention.
  • FIG. 9 is a schematic flowchart of a method for determining a base station cooperation group according to an embodiment of the present invention. detailed description
  • the inventors of the present invention have found that the communication quality of some cell edge mobile terminals and antennas can be improved by using a static, pre-determined antenna cooperative group method in the prior art, but for some cell edge mobile terminals, reservation is made in advance.
  • the antenna cooperative group is not suitable (such as the mobile terminal 2 shown in Fig. 3a); therefore, a dynamic antenna cooperative group method can be employed to solve the problem.
  • the group is also used, and the antenna cooperative group is utilized to improve the communication quality between the mobile terminal and the antenna.
  • an embodiment of the present invention further provides a method for dynamically determining a mobile terminal set for each mobile terminal.
  • the mobile terminal of the mobile terminal includes a mobile terminal with strong interference to the mobile terminal signal, so that interference suppression can be performed for the mobile terminal in the mobile terminal set, thereby improving the mobile terminal and the antenna.
  • the amount of communication shield is not limited to any mobile terminal.
  • a flowchart of a method for determining an antenna cooperative group, performing signal detection, and transmitting for a mobile terminal A signal joint processing system is as shown in FIG. 5, and includes the following steps: S501, a signal joint processing system
  • the channel quality between the mobile terminal A and the plurality of antennas is obtained. Assuming that the mobile terminal A communicates with the base station antenna of the serving cell at the frequency point A to receive/transmit signals, the antennas of the base stations of some neighboring cells may also receive the signals transmitted by the mobile terminal A at the frequency point A, or these antennas When the signal is transmitted at frequency point A, mobile terminal A can receive the signals they transmit.
  • the channel quality i.e., channel shield
  • the specific method can be:
  • the mobile terminal A transmits an uplink pilot to the antennas, and the base station detects the pilot signals received by the antennas to determine the channel quality (ie, channel quality) between the mobile terminal A and the antennas. For example, detecting the signal-to-noise ratio of the pilot signal received by the antenna, reflecting the channel quality between the mobile terminal A and each antenna by the signal-to-noise ratio; or detecting the peak value of the pilot signal received by the antenna, and reflecting the mobile terminal A by the peak size. And the quality of the channel between the antennas; or detecting the power of the pilot signal received by the antenna, and reflecting the channel quality between the mobile terminal A and each antenna by the power level.
  • a person skilled in the art can determine the channel quality between the mobile terminal A and each antenna according to actual conditions.
  • the mobile terminal A to be determined by the base station
  • the channel quality with each antenna is sent to the signal joint processing system.
  • the base station transmits the downlink pilot to the mobile terminal A through the antenna, and the mobile terminal A detects the power of the received pilot signal, or the signal-to-noise ratio, or the peak value, and reports it to the base station, and the base station according to the pilot signal reported by the mobile terminal.
  • the power, or the signal-to-noise ratio, or the peak value, etc. determines the channel quality between the mobile terminal A and each antenna, and transmits the determined channel shield between the mobile terminal A and each antenna to the signal joint processing system.
  • the signal joint processing system determines an antenna cooperation group of the mobile terminal A according to the obtained channel quality.
  • the antenna corresponding to the channel quality of the signal joint processing system is higher than the channel quality.
  • the antenna corresponding to the channel quality is used as the antenna in the antenna cooperative group of the mobile terminal A.
  • the channel quality threshold A can be either preset or calculated as follows:
  • the signal joint processing system determines the highest channel quality among the obtained channel qualities, and the product of the highest channel quality and a set percentage threshold (e.g., 70%) is the channel quality threshold A.
  • a set percentage threshold e.g. 70%
  • the signal joint processing system can adopt the signal detection and transmission techniques of the prior art. That is, the antenna cooperative group determined by the method according to the embodiment of the present invention is regarded as a predetermined antenna cooperative group, for example, after the antennas A, B, and C are determined as the antenna cooperative group of the mobile terminal A, the foregoing prior art is used.
  • the signal detecting method and the signal transmitting method implement communication with the mobile terminal A. For example, when detecting a signal: the signal joint processing system obtains the determined signal received by each antenna in the antenna cooperative group of the mobile terminal A at the frequency point A; and according to the obtained antennas in the antenna cooperative group and the frequency antenna A thereof The channel information between the mobile terminals detects the signal of the mobile terminal.
  • the signal joint processing system obtains the data information that needs to be transmitted to the mobile terminal A; and according to the obtained channel information between each antenna in the antenna cooperation group and the mobile terminal served at the frequency point A Determining, by the antennas in the antenna cooperative group, signals transmitted at frequency point A.
  • the antenna with strong interference to the mobile terminal can be taken into consideration, thereby performing effective signal interference suppression.
  • the signal joint processing system obtains a channel shield between each antenna in the antenna cooperative group at a frequency point A and each mobile terminal.
  • antenna C can receive the signal transmitted by the mobile terminal in the local cell and the neighboring cell at frequency point A; or the signal transmitted by antenna C at frequency point A can be The mobile terminal in the cell and the neighboring cell receives it.
  • the signal joint processing system obtains the channel quality between antenna C and these mobile terminals.
  • the specific method for determining the channel quality between the antenna C and the mobile terminals can be the same as that described in the step S501, and details are not described herein again.
  • the signal joint processing system determines the mobile terminal set according to the channel quality between the frequency point A and each mobile terminal of each antenna in the obtained antenna cooperation group.
  • the signal joint processing system After the signal joint processing system obtains the channel shield between each antenna in the antenna cooperative group at the frequency point A and each mobile terminal, the sum of the channel qualities of the mobile terminal and each antenna is calculated for each mobile terminal, and each of the calculated The sum of the channel qualities of the mobile terminal is compared with the channel quality threshold B, and the mobile terminal corresponding to the channel quality sum of the channel quality threshold B is regarded as a member of the mobile terminal set.
  • the channel quality threshold B can be either preset or the product of the sum of the highest channel quality and the set percentage threshold (eg 70%).
  • the signal joint processing system cooperates with the antennas in the antenna cooperative group to suppress interference signals in the mobile terminal set.
  • the signal joint processing system obtains the signal received by each antenna in the antenna cooperative group at the frequency point A, and detects the mobile terminal A according to the channel information between each antenna in the obtained antenna cooperative group and each mobile terminal in the mobile terminal set.
  • signal of Specifically, the MIMO technology provided in the prior art may be used to detect the signal of the mobile terminal A, and details are not described herein again.
  • the signal joint processing system When transmitting a signal to the mobile terminal A, the signal joint processing system sends a signal to the mobile terminal A through the antennas in the antenna cooperative group.
  • the signal joint processing system obtains the data information that needs to be sent to the mobile terminal A, and according to the obtained channel information between each antenna in the antenna cooperative group and each mobile terminal in the set of mobile terminals, Determine the signal transmitted by each antenna in the antenna cooperative group at frequency point A.
  • the prior art number may be used, and details are not described herein again.
  • the signal joint processing system notifies the base station after determining the transmission signal, and the base station controls the antenna to perform signal transmission according to the transmission signal determined by the signal joint processing system. In this way, interference signals arriving at the mobile terminal A can be suppressed.
  • the channel quality between the mobile terminal A and the multiple antennas is continuously obtained periodically; if the channel quality changes, the antenna cooperation group and the mobile terminal set of the mobile terminal A are updated (ie, steps S502-S504 are performed), and according to the updated The antenna cooperative group and the mobile terminal set perform signal detection and transmission (ie, steps S505, S506 are performed); otherwise, step S508 is continued.
  • the channel quality between the mobile terminal A and the antenna D and the antenna E is better than that of the mobile terminal A and the antenna B.
  • the channel quality between the antennas C; the signal joint processing system re-determines the antenna cooperative group according to the newly obtained channel quality, including: antenna A, antenna D, and antenna E, and re-determines the motion according to the above method according to the updated antenna cooperative group.
  • the terminal is aggregated, thereby continuing signal detection and transmission (i.e., performing steps S505, S506).
  • step S504 periodically obtaining the channel shield between the antennas in the antenna cooperative group at the frequency point A and each mobile terminal; if the channel quality changes, updating the mobile terminal set of the mobile terminal A (ie, performing step S504), and according to The updated set of mobile terminals performs signal detection and transmission (ie, steps S505, S506 are performed); otherwise, subsequent signal detection and transmission can be directly performed (ie, steps S505, S506 are performed).
  • the method of dynamically determining the set of mobile terminals can also be applied to the static antenna cooperative group of the prior art. That is to say, for the predetermined antenna cooperative group according to the prior art, the method of dynamically determining the set of mobile terminals may also be adopted to perform mobile terminal signal detection and transmission.
  • the members in the static antenna cooperative group preset according to the prior art are mobiles served by the base station antennas 8, B, and C.
  • the terminal (such as mobile terminal A) can adopt the method as steps S503-S506 to dynamically determine After the mobile terminal set is determined, the mobile terminal signal detection and transmission are performed. Since the determined set of mobile terminals includes mobile terminals that have strong interference to the mobile terminal A, it is more effective to perform signal interference suppression for the set of interfering mobile terminals, and the communication quality between the mobile terminal and the base station can be improved.
  • the signal joint processing system can have the structure shown in Figs. 6, 7, and 8.
  • the signal joint processing system shown in Fig. 6 includes: an antenna cooperative group determining means 601 and a signal detecting means 602.
  • the antenna cooperative group determining means 601 is for determining an antenna cooperative group of the mobile terminal, and the mobile terminal performs signal transmission and reception at the frequency point A. Specifically, the antenna cooperative group determining apparatus 601 obtains channel quality between the mobile terminal and the at least two antennas; and determines that the antenna corresponding to the channel quality higher than the channel quality threshold A constitutes an antenna cooperative group of the mobile terminal.
  • the method for determining the channel shield threshold A is the same as that in step S502, and details are not described herein again.
  • the signal detecting device 602 is configured to obtain a signal received by each antenna in the antenna cooperative group at a frequency point A; and according to the obtained channel information between each antenna in the antenna cooperative group and a mobile terminal served at the frequency point A, A signal of the mobile terminal is detected.
  • the signal joint processing system shown in FIG. 6 may further include: a transmission signal determining means 603.
  • the transmission signal determining means 603 obtains data information that needs to be transmitted to the mobile terminal; and determines the antenna cooperative group according to the obtained channel information between each antenna in the antenna cooperative group and the mobile terminal served at the frequency point A The signal transmitted by each antenna at frequency point A.
  • the signal joint processing system shown in FIG. 7 includes: an antenna cooperative group determining means 701, a mobile terminal set determining module 702, and a signal detecting means 703.
  • the antenna cooperative group determining means 701 is configured to determine an antenna cooperative group of the mobile terminal, and the mobile terminal performs signal transmission and reception at the frequency point A. Specifically, the antenna cooperative group determining apparatus 701 obtains the channel quality between the mobile terminal and the at least two antennas; and determines that the antenna corresponding to the channel quality higher than the channel quality threshold A constitutes the antenna cooperative group of the mobile terminal.
  • Channel quality threshold A is indeed The method is the same as that in step S502, and details are not described herein again.
  • the mobile terminal set determining module 702 is configured to determine a mobile terminal set of the mobile terminal. Specifically, the mobile terminal set determining module 702 obtains the channel quality between each antenna in the antenna cooperative group of the mobile terminal at the frequency point A and each mobile terminal, and determines the channel quality of the mobile terminal and each antenna for each mobile terminal. And summing, comparing the determined channel shield sum of each mobile terminal with the channel quality threshold B, and using the mobile terminal corresponding to the channel quality sum of the channel quality threshold B as a member of the mobile terminal set.
  • the channel quality threshold B can be either a preset or a product of the sum of the highest channel quality and a set percentage threshold (e.g., 70%).
  • the signal detecting device 703 is configured to obtain a signal received by each antenna in the antenna cooperative group at a frequency point A; and according to the obtained channel information between each antenna in the antenna cooperative group and each mobile terminal in the mobile terminal set. , detecting a signal of the mobile terminal.
  • the transmission signal determining means 704 obtains the data information that needs to be sent to the mobile terminal; and determines the antenna cooperation according to the obtained channel information between each antenna in the antenna cooperation group and each mobile terminal in the mobile terminal set. The signal sent by each antenna in the group at frequency point A.
  • the signal joint processing system shown in FIG. 8 includes: a mobile terminal set determining module 801 and a signal detecting device 802.
  • the mobile terminal set determining module 801 is configured to obtain a channel quality between each of the antennas in the antenna cooperative group of the mobile terminal at a frequency point A and each mobile terminal, and determine a channel quality sum of the mobile terminal and each antenna for each mobile terminal, Forming, by the mobile terminal corresponding to the channel quality sum higher than the channel quality threshold, a mobile terminal set;
  • the signal detecting device 802 is configured to obtain a signal received by each antenna in the antenna cooperative group at a frequency point A; and according to the obtained channel information between each antenna in the antenna cooperative group and each mobile terminal in the mobile terminal set. , detecting a signal of the mobile terminal.
  • the signal joint processing system shown in FIG. 8 further includes: a transmission signal determining means 803.
  • the transmission signal determining apparatus 803 is configured to obtain data information that needs to be sent to the mobile terminal, and according to the obtained antennas in the antenna cooperation group and each mobile terminal in the mobile terminal set.
  • the channel information between the antennas is determined by the signals transmitted by the antennas at the frequency point A in the antenna cooperative group.
  • the above signal joint processing system (which may be a signal joint processing system shown in FIG. 6 or FIG. 7 or FIG. 8) may be connected to a plurality of base stations (for example, 20-30 base stations) in a separate server, thereby Obtaining the transmission and reception signals and related information of the base station antennas, thereby suppressing the interference signals and improving the communication quality between the base station antenna and the mobile terminal; or the signal joint processing system may be integrated in a base station, and the base station passes The interconnected networks between the base stations obtain transmission and reception signals and related information of other base station antennas, thereby suppressing interference signals and improving communication quality between the base station antennas and the mobile terminals.
  • the antenna cooperation group is dynamically determined according to the channel quality between the mobile terminal and the antennas of the base stations, and therefore, the determined antenna cooperation group includes an antenna with strong interference to the mobile terminal (or the mobile terminal The antenna with strong interference) performs signal interference suppression for these antennas, so that a higher mobile terminal signal detection accuracy rate can be obtained, and the correct rate of the received signal of the mobile terminal can be improved, that is, the communication quality between the mobile terminal and the base station is improved.
  • the determined mobile terminal set includes the mobile terminal that strongly interferes with the mobile terminal.
  • the signal interference suppression is performed, so that the higher mobile terminal signal detection accuracy rate can be obtained, and the correct rate of the mobile terminal receiving signal is improved, that is, the communication quality between the mobile terminal and the base station is improved.
  • the signal joint processing system obtains channel quality between the mobile terminal and the at least two base stations; and obtaining, by the signal joint processing system, the channel quality between the mobile terminal and the base station can be implemented by the following two methods:
  • the channel is specifically the uplink channel quality
  • the mobile terminal first sends an uplink pilot to the base station, the base station detects the uplink pilot, and determines the uplink channel quality between the mobile terminal and the base station, and the signal joint processing system
  • the base station obtains the uplink channel quality and uses the obtained uplink channel quality as the channel quality between the mobile terminal and the base station.
  • the channel shield is specifically the downlink channel quality, and the mobile terminal first detects the downlink pilot transmitted by the base station, determines the downlink channel quality between the base station, and reports the downlink channel quality to the base station, and performs signal joint processing.
  • the system obtains the downlink channel quality from the base station, and uses the obtained downlink channel quality as the channel quality between the mobile terminal and the base station.
  • the signal joint processing system determines that the base station corresponding to the channel quality higher than the channel quality threshold constitutes a base station cooperation group of the mobile terminal.
  • the preset value may be used as a channel quality threshold, or the channel quality threshold may be determined according to the following method:
  • the signal joint processing system determines the highest channel quality among the obtained channel qualities, and then uses the product of the highest channel shield and the set percentage threshold as the channel quality threshold.
  • How to use the determined base station cooperative group to detect the signal sent by the mobile terminal is consistent with the method for detecting the signal transmitted by the mobile terminal by using the determined antenna cooperative group, and how to determine the signal sent by the base station and the above using the determined base station cooperation group
  • the method for determining the signal transmitted by the antenna using the determined antenna cooperative group is consistent, and will not be described here.
  • each base station includes at least one antenna.
  • the embodiment of the present invention further provides a base station cooperation group determining apparatus, including a channel quality obtaining module and a base station cooperation group determining module, where:
  • a channel shield obtaining module configured to obtain channel quality between the mobile terminal and the at least two base stations
  • a base station cooperative group determining module configured to determine, by the base station corresponding to the channel shield of the channel quality threshold, a base station that constitutes the mobile terminal Collaboration group.
  • the base station cooperation group determining module includes:
  • a highest channel quality determining unit configured to determine a highest channel quality in a channel quality obtained by the channel quality obtaining module
  • a channel quality threshold determining unit configured to use, by the highest channel quality determining unit, a product of a highest channel quality and a set percentage threshold as the channel quality threshold
  • the base station cooperation group determining unit is configured to determine, by the base station corresponding to the channel quality of the channel quality threshold determined by the channel quality threshold determining unit, a base station cooperation group that constitutes the mobile terminal. It can be completed by a program to instruct related hardware, and the program can be stored in a computer readable storage medium, such as: ROM/RAM, disk, optical disk, and the like.

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Description

天线协作组确定方法和装置、 基站协作组确定方法和装置 技术领域
本发明涉及移动通信领域, 尤其涉及降低相邻小区之间信号干扰的技术。 背景技术
LTE-Advanced 系统采用正交频分多址(OFDMA ) 的接入方式, 由于小 区内移动终端发送、 接收的信息承载在相互正交的不同子载波上, 从而避免 了同一个小区的移动终端间的信号干扰。 但是 OFDMA接入方式不具备抑制 小区间干扰的能力, 因此影响 LTE-Advanced系统性能的信号干扰主要来自相 邻小区, 即小区间的信号干扰。 并且, 宽带移动通信系统为了获得更高频谱 利用率, 在网络部署时将尽可能釆取同频组网的方式, 那么在同频组网的蜂 窝系统中, 小区边缘的移动终端更容易受到相邻小区信号的干扰, 从而严重 限制了小区边缘移动终端的服务质量和吞吐量。
例如, 如图 1所示, 移动终端 1的服务基站天线是天线 1, 移动终端 2的 服务基站天线是天线 2,移动终端 3的服务基站天线是天线 3,移动终端 1、 2、 3同时同频(例如频率点 A )分别向天线 1、 2、 3发送信号。 天线 1在频率点 A接收的信号中包括了移动终端 1的有用信号, 还包括了移动终端 2和移动 终端 3的干扰信号, 即天线 1在频率点 A接收的信号为移动终端 1的信号与 移动终端 2、 3发送信号的混合信号; 同理天线 2在频率点 A除了接收到移动 终端 2的有用信号外, 还接收到了移动终端 1和移动终端 3的干扰信号; 天 线 3在频率点 A除了接收到移动终端 3的有用信号外, 还接收到了移动终端 1和移动终端 2 的干扰信号。 换言之, 移动终端 1、 移动终端 2和移动终端 3 发射的信号都可以被天线 1、 天线 2和天线 3共同接收到。
对于下行信道, 移动终端 1除了接收到天线 1 的有用信号外, 还接收到 了天线 2和天线 3分别发送给移动终端 2、 3的信号; 同理移动终端 2除了接 收到天线 2的有用信号外, 还接收到天线 1和天线 3分别发送给移动终端 1、 3的信号; 用户 3除了接收到天线 3的有用信号外, 还接收到天线 1和天线 2 分别发送给移动终端 1、 2的信号。 换言之, 天线 1、 天线 2和天线 3在频率 点 A发射的信号, 移动终端 1、 移动终端 2和移动终端 3都可以同时接收到。
为了能减小这种小区间的信号干扰, 在现有技术中, 将天线 1、 天线 2和 天线 3组成一个天线协作组(如图 2所示) 由信号联合处理系统对天线协作 组接收移动终端 1、 2、 3的信号、 或者向移动终端 1、 2、 3发送信号进行协 作处理以提高天线对移动终端信号的检测正确率, 以及移动终端接收天线发 送信号的正确率。
在现有技术中, 天线协作組的信号联合处理系统获得天线协作组中各天 线与移动终端之间的信道信息 (该信道信息反映了天线与移动终端之间通信 的信道质量),并采用 MIMO技术从接收的信号中抑制相邻小区的移动终端的 干扰信号:
信号联合处理系统获得天线 1、 2、 3在频率点 A接收的信号, 以及天线 1、 2、 3与移动终端 1、 2、 3之间的信道信息。 信号联合处理系统根据获得的 信号和信道信息采用 MIMO技术从接收的信号中抑制相邻小区的移动终端的 干扰信号, 从而检测出移动终端 1、 2、 3 实际发送信号 (比如可以通过如下 方程式组 1估计出 ): ( 1 )
Figure imgf000004_0001
其中, Pl、 P2、 P3分别为天线 1、 2、 3在频率点 A接收的信号; Al、 Bl、 CI分别表示天线 1与移动终端 1、 2、 3之间的信道信息; A2、 B2、 C2 分别表示天线 2与移动终端 1、 2、 3之间的信道信息; A3、 B3、 C3分别表示 天线 3与移动终端 1、 2、 3之间的信道信息; nl、 n2、 n3分别表示天线 1、 天线 2、 天线 3的接收噪声和其他小区的干扰信号; 通过上述的方程式组 1即 可估计出移动终端 1、 2、 3实际发送信号 X、 Y、 Ζ。
此外, 在向移动终端发送信号时, 为了提高移动终端接收天线信号的正 确率, 天线协作组中的天线对发送给移动终端的信号作协作处理: 信号联合处理系统获得需要向移动终端 1、 2、 3发送的数据信息, 以及 天线 1、 2、 3与移动终端 1、 2、 3之间的信道信息。 信号联合处理系统根据 获得的数据信息和信道信息采用波束赋型算法对需要发送给移动终端 1、 2、 3 的数据信息进行加权处理得到发送信号, 天线 1、 2、 3将加权计算出的发送 信号在频率点 A进行发送(比如可以通过如下方程式组 2得到天线 1、 2、 3 在频率点 A发送的信号):
A2 RlxX + B2xR2xX + C2xR3xX = 0
L.A3xRlxX + B3xR2xX + C3xR3xX = 0 ( 2 )
其中, Al、 Bl、 CI分别表示移动终端 1与天线 1、 2、 3之间的信道信息; A2、 B2、 C2分别表示移动终端 2与天线 1、 2、 3之间的信道信息; A3、 B3、 C3分别表示移动终端 3与天线 1、 2、 3之间的信道信息; 根据上述方程式可 以解出多组 Rl、 R2、 R3, 选取其中一组作为天线 1、 2、 3分别对需要向移动 终端 1发送的数据信息的加权值。 同理, 可以计算出天线 1、 2、 3分别对需 要向移动终端 2发送的数据信息的加权值 Rl'、 R2'、 R3'; 天线 1、 2、 3分别 对需要向移动终端 3发送的数据信息的加权值 Rl',、 R2',、 R3''。 这样, 就得 到天线 1在频率点 A发送的信号为: RlxX + Rl'xY + Rr'xZ; 天线 2在频率点 A发送的信号为: R2xX + R2'xY + R2''xZ; 天线 3在频率点 A发送的信号为: R3xX + R3'xY + R3"xZ; 其中, X、 Y、 Ζ分别为需要向移动终端 1、 2、 3发送 的数据信息。
但是, 在如图 3a所示的场景中移动终端 2从天线 4接收的干扰信号更大 于天线 1, 因此, 按照上述现有技术的天线协作组的方法虽然可以提高部分小 区边缘移动终端 (比如图 3a中的移动终端 1、 3) 的信号接收检测的正确率, 但对有些小区边缘移动终端 (比如图 3a中的移动终端 2)信号干扰抑制的效 果并不理想; 或者, 在如图 3b所示的场景中, 天线 2接收的移动终端 2发送 的信号中其中的干扰信号主要来自于向移动终端 4、 移动终端 3, 而非如上述 现有技术中信号干扰中参与计算的移动终端 1, 因此, 在如图 3b所示的场景 中采用现有技术的方法来对移动终端 2接收、 发送信号进行干扰抑制的效果 也有限。
综上所述, 现有技术的小区间信号干扰抑制的方法并不能针对各种实际 情况都可以有效的抑制移动终端与天线通信信号的干扰, 使得基站天线与一 些小区边缘移动终端的通信质量不一定能够得到保证, 同理, 现有的小区间 信号干扰抑制的方法也不能针对各种实际情况都可以有效的抑制移动终端与 基站通信信号的干扰, 使得基站与一些小区边缘移动终端的通信质量不一定 能够得到保证。 发明内容
本发明实施例提供了一种天线协作组确定方法和装置, 用以提高移动终 端与基站天线之间的通信质量, 尤其是提高小区边缘移动终端与基站天线之 间的通信质量。
本发明实施例还提供了一种基站协作组确定方法和装置, 用以提高移动 终端与基站之间的通信质量, 尤其是提高小区边缘移动终端与基站之间的通 信质量。
一种天线协作组确定方法, 包括:
信号联合处理系统获得移动终端与至少两个天线之间的信道质量; 并 确定高于信道质量门限的信道质量所对应的天线组成该移动终端的天线 协作组。
一种天线协作组确定装置, 包括:
信道质量获得模块, 用于获得移动终端与至少两个天线之间的信道质量; 天线协作组确定模块, 用于确定高于信道质量门限的信道质量所对应的 天线组成该移动终端的天线协作组。
一种基站协作组确定方法, 包括:
信号联合处理系统获得移动终端与至少两个基站之间的信道质量; 并 确定高于信道质量门限的信道质量所对应的基站组成该移动终端的基站 协作组。
一种基站协作组确定装置, 包括:
信道盾量获得模块, 用于获得移动终端与至少两个基站之间的信道质量; 基站协作组确定模块, 用于确定高于信道质量门限的信道质量所对应的 基站组成该移动终端的基站协作组。
本发明实施例由于根据移动终端与各基站的天线之间的信道盾量来动态 确定出天线协作组, 因此, 确定的天线协作组中包括了对移动终端干扰较强 的天线(或者移动终端对其干扰较强的天线), 针对这些天线进行信号联合处 理, 从而可以获得更高的移动终端信号检测正确率, 提高移动终端接收信号 的正确率, 即提高了移动终端与基站之间的通信质量。
本发明实施例由于根据移动终端与各基站之间的信道盾量来动态确定出 基站协作组, 因此, 确定的基站协作组中包括了对移动终端干扰较强的基站
(或者移动终端对其干扰较强的基站) , 针对这些基站进行信号联合处理, 从而可以荻得更高的移动终端信号检测正确率, 提高移动终端接收信号的正 确率, 即提高了移动终端与基站之间的通信质量。 附图说明
图 1 为现有技术的受到相邻小区信号干扰的基站天线与移动终端的示意 图;
图 1为现有技术的天线协作组示意图;
图 3a、 3b为现有技术的天线协作组对移动终端与天线之间提高通信质量 局限性示意图;
图 4为本发明实施例的确定天线协作组的示意图;
图 5 为本发明实施例的确定天线协作组、 进行信号检测、 发送的方法流 程图;
图 6、 7、 8为本发明实施例的信号联合处理系统的结构框图;
图 9为本发明实施例的确定基站协作组方法流程示意图。 具体实施方式
本发明的发明人发现, 由于现有技术中采用静态的、 事先预定天线协作 组的方法可以提高部分小区边缘移动终端与天线的通信质量, 但是, 对于某 些小区边缘移动终端来说, 事先预定天线协作组并不适合(比如图 3a所示的 移动终端 2 ); 因此, 可以采用一种动态天线协作组的方法来解决该问题。 也 作组, 并利用该天线协作组来提高该移动终端与天线之间的通信质量。
此外, 本发明实施例还提供了针对各移动终端, 动态确定其干扰移动终 端集合的方法。 在移动终端的干扰移动终端集合中包含了对该移动终端信号 干扰较强的移动终端, 这样, 就可以针对干扰移动终端集合中的移动终端来 进行干扰抑制, 从而提高该移动终端与天线之间的通信盾量。
例如, 在如图 4所示的系统中, 针对移动终端 A信号联合处理系统确定 天线协作组、 进行信号检测、 发送的方法流程图如图 5所示, 包括如下步骤: S501、 信号联合处理系统获得移动终端 A与多个天线之间的信道质量。 假设移动终端 A在频率点 A与服务小区的基站天线进行通信接收 /发送信 号, 那么在相邻的一些小区的基站的天线也可能在频率点 A接收到移动终端 A发送的信号, 或者这些天线在频率点 A发射信号时, 移动终端 A可以接收 到它们发射的信号。 统计移动终端 A与这些天线 (至少包括两个天线)之间 的信道质量(即信道盾量)。 具体方法可以是:
1 )移动终端 A向这些天线发送上行导频, 基站检测各天线接收的导频信 号确定移动终端 A与各天线之间的信道质量(即信道质量)。 比如, 检测天 线接收的导频信号的信噪比, 以信噪比大小反映移动终端 A与各天线之间的 信道质量;或者检测天线接收的导频信号的峰值,以峰值大小反映移动终端 A 与各天线之间的信道质量; 或者检测天线接收的导频信号的功率, 以功率大 小反映移动终端 A与各天线之间的信道质量。 本领域技术人员可以根据实际 情况来确定移动终端 A与各天线之间的信道质量。 基站将确定的移动终端 A 与各天线之间的信道质量发送给信号联合处理系统。
2 )基站通过这些天线向移动终端 A发送下行导频, 移动终端 A检测接 收的导频信号的功率、 或者信噪比、 或者峰值等并上报给基站, 基站根据移 动终端上报的导频信号的功率、 或者信噪比、 或者峰值等确定移动终端 A与 各天线之间的信道质量, 并将确定的移动终端 A与各天线之间的信道盾量发 送给信号联合处理系统。
S502、 信号联合处理系统根据获得的信道质量确定移动终端 A的天线协 作组。
信号联合处理系统高于信道质量门限 A的信道质量所对应的天线作为移 动终端 A的天线协作组中的天线。 信道质量门限 A既可以是预先设定的, 也 可以是通过如下方法计算的:
信号联合处理系统确定获得的信道质量中最高信道质量, 以最高信道质 量与设定的百分比门限(比如 70% ) 的乘积为所述信道质量门限 A。
在确定移动终端 A的天线协作组后, 信号联合处理系统可以采用现有技 术的信号检测、 发送技术。 即把根据本发明实施例的方法确定的天线协作组 视为事先预定的天线协作组, 比如将天线 A、 B、 C确定为移动终端 A的天线 协作组后, 采用上述现有技术中所述的信号检测方法、 以及信号发送方法来 实现与移动终端 A的通信。 比如, 在检测信号时: 信号联合处理系统获得确 定的移动终端 A的天线协作组中各天线在频率点 A接收的信号; 并根据获得 的所述天线协作组中各天线与其在频率点 A服务的移动终端之间的信道信 息, 检测出所述移动终端的信号。 在需要向移动终端发送信号时: 信号联合 处理系统获得需要发送给移动终端 A的数据信息; 并根据获得的所述天线协 作组中各天线与其在频率点 A服务的移动终端之间的信道信息, 确定所述天 线协作组中各天线在频率点 A发送的信号。
这样, 动态的来确定天线协作组, 就可以将对移动终端干扰较强的天线 考虑进来, 从而进行有效的信号干扰抑制。
此外, 为取得更好的通信质量, 还可以采取本发明实施例提供的动态确 定移动终端集合的方法来实现移动终端 A与天线的通信:
5503、 信号联合处理系统获得天线协作组中各天线在频率点 A与各移动 终端之间的信道盾量。
对于天线协作组中的一个天线(假设天线 C ), 天线 C在频率点 A可以接 收到本小区内, 以及相邻小区的移动终端发送的信号; 或者天线 C在频率点 A发射的信号可以被本小区内, 以及相邻小区的移动终端接收到。 信号联合 处理系统获得天线 C与这些移动终端之间的信道质量。 确定天线 C与这些移 动终端之间的信道质量的具体方法可以与步骤 S501中介绍的一样, 此处不再 赘述。
5504、 信号联合处理系统根据获得的天线协作组中各天线在频率点 A与 各移动终端之间的信道质量确定移动终端集合。
在信号联合处理系统获得天线协作组中各天线在频率点 A与各移动终端 之间的信道盾量后, 针对每个移动终端计算该移动终端与各天线的信道质量 的总和, 将计算的各移动终端的信道质量总和与信道质量门限 B相比较, 将 高于信道质量门限 B的信道质量总和所对应的移动终端作为移动终端集合中 的成员。 信道质量门限 B既可以是预先设定的, 也可以是最高信道质量总和 与设定的百分比门限(比如 70% ) 的乘积值。
5505、 在检测移动终端 A发送的信号时, 信号联合处理系统对天线协作 组中的天线进行协作抑制干扰移动终端集合中的干扰信号。
信号联合处理系统获得天线协作组中各天线在频率点 A接收的信号, 并 根据获得的天线协作组中各天线与所述移动终端集合中各移动终端之间的信 道信息, 检测出移动终端 A 的信号。 具体可以采用如现有技术中所提供的 MIMO技术来检测移动终端 A的信号, 此处不再赘述。
5506、 在向移动终端 A发送信号时, 信号联合处理系统通过天线协作组 中的天线共同向移动终端 A发送信号。
信号联合处理系统获得需要发送给移动终端 A的数据信息, 并才艮据获得 的天线协作组中各天线与所述移动终端集合中各移动终端之间的信道信息, 确定天线协作组中各天线在频率点 A发送的信号。 具体可以采用如现有技术 号, 此处不再赘述。
信号联合处理系统在确定发送信号后通知基站, 基站根据信号联合处理 系统确定的发送信号控制天线进行信号发送。这样,可以抑制到达移动终端 A 的干扰信号。
5507、 定期继续获得移动终端 A与多个天线之间的信道质量; 若信道质 量发生改变, 则更新移动终端 A的天线协作组和移动终端集合(即执行步骤 S502-S504 ), 并根据更新的天线协作组和移动终端集合来进行信号检测和发 送(即执行步骤 S505、 S506 ); 否则, 继续步骤 S508。
例如当图 4中的移动终端 A移动到更靠近天线 D、 天线 E所在小区的位 置时, 此时, 移动终端 A与天线 D、 天线 E之间的信道质量会好于移动终端 A与天线 B、 天线 C之间的信道质量; 则信号联合处理系统根据新获得的信 道质量重新确定了天线协作组包括: 天线 A、 天线 D、 天线 E, 并根据更新的 天线协作组重新根据上述方法确定移动终端集合, 从而继续进行信号检测和 发送(即执行步骤 S505、 S506 )。
5508、 定期继续获得天线协作组中各天线在频率点 A与各移动终端之间 的信道盾量; 若信道质量发生改变, 则更新移动终端 A的移动终端集合(即 执行步骤 S504 ), 并根据更新的移动终端集合来进行信号检测和发送(即执行 步骤 S505、 S506 );否则,后续可直接进行信号检测和发送(即执行步骤 S505、 S506 )。
这里需要指出的是, 动态确定移动终端集合的方法也可应用于现有技术 的静态天线协作组中。 也就是说, 对于按照现有技术的、 预先确定的天线协 作组也可以采取动态确定移动终端集合的方法后进行移动终端信号检测与发 送。 例如, 对于本发明实施例中提到的基站天线 A、 B、 C, 假设是按照现有 技术事先预设的静态天线协作组中的成员, 则对于基站天线八、 B、 C所服务 的移动终端 (比如移动终端 A )可以采用如步骤 S503-S506的方法来动态确 定移动终端集合后, 进行移动终端信号检测与发送。 由于确定的移动终端集 合中包括了对移动终端 A干扰较为强烈的移动终端, 因此, 针对干扰移动终 端集合来进行信号干扰抑制更加有效, 可以提高移动终端与基站之间的通信 质量。
本领域技术人员可以理解, 虽然上述说明中, 为便于理解, 对方法的步 骤采用了顺序性描述, 但是应当指出, 对于上述步骤的顺序并不作严格限制。
才艮据上述方法信号联合处理系统可以具有如图 6、图 7、图 8所示的结构。 在图 6所示的信号联合处理系统中包括: 天线协作组确定装置 601、信号检测 装置 602。
天线协作组确定装置 601 用于确定移动终端的天线协作组, 所述移动终 端在频率点 A进行信号的发送与接收。 具体的, 天线协作组确定装置 601获 得移动终端与至少两个天线之间的信道质量; 并确定高于信道质量门限 A的 信道质量所对应的天线组成该移动终端的天线协作组。 信道盾量门限 A的确 定方法与步骤 S502中相同, 此处不再赘述。
信号检测装置 602用于获得所述天线协作组中各天线在频率点 A接收的 信号; 并根据获得的所述天线协作组中各天线与其在频率点 A服务的移动终 端之间的信道信息, 检测出所述移动终端的信号。
在图 6所示的信号联合处理系统中还可以包括: 发送信号确定装置 603。 发送信号确定装置 603 获得需要发送给所述移动终端的数据信息; 并根 据获得的所述天线协作组中各天线与其在频率点 A服务的移动终端之间的信 道信息, 确定所述天线协作組中各天线在频率点 A发送的信号。
在图 7所示的信号联合处理系统中, 包括: 天线协作组确定装置 701、 移 动终端集合确定模块 702、 信号检测装置 703。
天线协作组确定装置 701 用于确定移动终端的天线协作组, 所述移动终 端在频率点 A进行信号的发送与接收。 具体的, 天线协作组确定装置 701获 得移动终端与至少两个天线之间的信道质量; 并确定高于信道质量门限 A的 信道质量所对应的天线组成该移动终端的天线协作组。 信道质量门限 A的确 定方法与步骤 S502中相同, 此处不再赘述。
移动终端集合确定模块 702用于确定该移动终端的移动终端集合。 具体 为, 移动终端集合确定模块 702获得该移动终端的天线协作组中各天线在频 率点 A与各移动终端之间的信道质量, 针对每个移动终端确定该移动终端与 各天线的信道质量的总和, 将确定的各移动终端的信道盾量总和与信道质量 门限 B相比较, 将高于信道质量门限 B的信道质量总和所对应的移动终端作 为移动终端集合中的成员。 信道质量门限 B既可以是预先设定的, 也可以是 最高信道质量总和与设定的百分比门限(比如 70% ) 的乘积值。
信号检测装置 703用于获得所述天线协作组中各天线在频率点 A接收的 信号; 并根据获得的所述天线协作组中各天线与所述移动终端集合中各移动 终端之间的信道信息, 检测出所述移动终端的信号。
在图 7所示的信号联合处理系统中还包括: 发送信号确定装置 704。 发送信号确定装置 704获得需要发送给所述移动终端的数据信息; 并根 据获得的所述天线协作组中各天线与所述移动终端集合中各移动终端之间的 信道信息, 确定所述天线协作組中各天线在频率点 A发送的信号。
在图 8所示的信号联合处理系统中包括: 移动终端集合确定模块 801、信 号检测装置 802。
移动终端集合确定模块 801 用于获得移动终端的天线协作组中各天线在 频率点 A与各移动终端之间的信道质量后, 针对每个移动终端确定该移动终 端与各天线的信道质量总和, 将高于信道质量门限的信道质量总和所对应的 移动终端组成移动终端集合;
信号检测装置 802用于获得所述天线协作组中各天线在频率点 A接收的 信号; 并根据获得的所述天线协作组中各天线与所述移动终端集合中各移动 终端之间的信道信息, 检测出所述移动终端的信号。
在图 8所示的信号联合处理系统中还包括: 发送信号确定装置 803。 发送信号确定装置 803 用于获得需要发送给所述移动终端的数据信息; 并根据获得的所述天线协作组中各天线与所述移动终端集合中各移动终端之 间的信道信息, 确定所述天线协作组中各天线在频率点 A发送的信号。
上述的信号联合处理系统(可以是图 6或图 7或图 8所示的一种信号联 合处理系统),可以位于一个独立的服务器中与多个基站(比如 20-30个基站) 相连, 从而获得这些基站天线发送、 接收信号以及相关信息, 从而实现对干 扰信号的抑制, 提高基站天线与移动终端之间的通信质量; 或者, 信号联合 处理系统也可以集成在某个基站内, 该基站通过基站之间的相互连通网络来 获得其它基站天线发送、 接收信号以及相关信息, 从而实现对干扰信号的抑 制, 提高基站天线与移动终端之间的通信质量。
本发明实施例由于根据移动终端与各基站的天线之间的信道质量来动态 确定出天线协作组, 因此, 确定的天线协作组中包括了对移动终端干扰较强 的天线(或者移动终端对其干扰较强的天线), 针对这些天线进行信号干扰抑 制, 从而可以获得更高的移动终端信号检测正确率, 提高移动终端接收信号 的正确率, 即提高了移动终端与基站之间的通信质量。
由于根据移动终端的天线协作组中各天线在特定频率点上与各移动终端 的信道质量来动态确定移动终端集合, 因此, 确定的移动终端集合中包括了 对该移动终端干扰较为强烈的移动终端, 针对这些干扰较为强烈的移动终端 来进行信号干扰抑制, 从而可以获得更高的移动终端信号检测正确率, 提高 移动终端接收信号的正确率, 即提高了移动终端与基站之间的通信质量。
此外, 如图 9所示, 为本发明实施例提供的确定基站协作组方法流程图, 其具体处理过程如下:
S901、信号联合处理系统获得移动终端与至少两个基站之间的信道质量; 信号联合处理系统获得移动终端与基站之间的信道质量可以由下述两种 方法实现:
1 )所述信道廣量具体为上行信道质量, 则移动终端首先向基站发送上行 导频, 该基站检测上行导频, 确定移动终端与该基站之间的上行信道质量, 信号联合处理系统从该基站获得上行信道质量, 并将获得的上行信道质量作 为移动终端与该基站之间的信道质量。 2 )所述信道盾量具体为下行信道质量, 则移动终端首先检测基站发送的 下行导频, 确定与该基站之间的下行信道质量, 并向该基站上报所述下行信 道质量, 信号联合处理系统从该基站获得所述下行信道质量, 并将获得的下 行信道质量作为移动终端与该基站之间的信道质量。
S902 , 信号联合处理系统确定高于信道质量门限的信道质量所对应的基 站组成该移动终端的基站协作組。
其中, 可以将预先设定值作为信道质量门限, 也可以根据如下方法确定 信道质量门限:
首先信号联合处理系统确定获得的信道质量中最高信道质量, 然后以最 高信道盾量与设定的百分比门限的乘积作为信道质量门限。
如何利用确定出的基站协作组检测移动终端发送的信号和上面描述的利 用确定出的天线协作组检测移动终端发送的信号方法一致, 且如何利用确定 出的基站协作组确定基站发送的信号与上面描述的利用确定出的天线协作组 确定天线发送的信号的方法一致, 这里均不再赘述。
本发明实施例中, 每个基站包含至少一个天线。
相应的, 本发明实施例还提供一种基站协作组确定装置, 包括信道质量 获得模块和基站协作组确定模块, 其中:
信道盾量获得模块, 用于获得移动终端与至少两个基站之间的信道质量; 基站协作组确定模块, 用于确定高于信道质量门限的信道盾量所对应的 基站组成该移动终端的基站协作组。
较佳地, 所述基站协作组确定模块包括:
最高信道质量确定单元, 用于确定所述信道质量获得模块获得的信道质 量中最高信道质量;
信道质量门限确定单元, 用于以所述最高信道质量确定单元确定的最高 信道质量与设定的百分比门限的乘积为所述信道质量门限;
基站协作组确定单元, 用于确定高于所述信道质量门限确定单元确定的 信道质量门限的信道质量所对应的基站组成该移动终端的基站协作组。 是可以通过程序来指令相关的硬件来完成, 该程序可以存储于一计算机可读 取存储介质中, 如: ROM/RAM、 磁碟、 光盘等。
还可以理解的是, 附图或实施例中所示的装置结构仅仅是示意性的, 表 示逻辑结构。 其中作为分离部件显示的模块可能是或者可能不是物理上分开 的, 作为模块显示的部件可能是或者可能不是物理模块。
以上所述仅是本发明的优选实施方式, 应当指出, 对于本技术领域的普 通技术人员来说, 在不脱离本发明原理的前提下, 还可以作出若干改进和润 饰, 这些改进和润饰也应视为本发明的保护范围。

Claims

权 利 要 求
1、 一种天线协作组确定方法, 其特征在于, 包括:
信号联合处理系统获得移动终端与至少两个天线之间的信道质量; 并 确定高于信道质量门限的信道质量所对应的天线组成该移动终端的天线 协作组。
2、 如权利要求 1所述的方法, 其特征在于, 所述信道质量具体为上行信 道质量; 以及
所述信号联合处理系统获得移动终端与天线之间的信道质量, 具体为: 所述移动终端向天线发送上行导频, 该天线所在基站检测所述上行导频 确定所述移动终端与该天线之间的上行信道质量;
所述信号联合处理系统从该基站获得所述上行信道质量作为所述移动终 端与该天线之间的信道质量。
3、 如权利要求 1所述的方法, 其特征在于, 所述信道质量具体为下行信 道质量; 以及
所述信号联合处理系统获得移动终端与天线之间的信道质量, 具体为: 所述移动终端检测天线发送的下行导频, 确定与该天线之间的下行信道 质量, 并向该天线所在基站上报所述下行信道质量;
所述信号联合处理系统从该基站获得所述下行信道质量作为所述移动终 端与该天线之间的信道质量。
4、 如权利要求 1所述的方法, 其特征在于, 所述信道质量门限为一预先 设定值; 或者,
所述信道质量门限根据如下方法确定:
所述信号联合处理系统确定获得的信道质量中最高信道质量, 以所述最 高信道质量与设定的百分比门限的乘积为所述信道质量门限。
5、 一种天线协作组确定装置, 其特征在于, 包括:
信道质量获得模块, 用于获得移动终端与至少两个天线之间的信道质量; 天线协作组确定模块, 用于确定高于信道质量门限的信道质量所对应的 天线组成该移动终端的天线协作组。
6、 如权利要求 5所述的装置, 其特征在于, 所述天线协作组确定模块包 括:
最高信道质量确定单元, 用于确定所述信道质量获得模块获得的信道盾 量中最高信道质量;
信道盾量门限确定单元, 用于以所述最高信道质量确定单元确定的最高 信道质量与设定的百分比门限的乘积为所述信道质量门限;
天线协作组确定单元, 用于确定高于所述信道质量门限确定单元确定的 信道质量门限的信道质量所对应的天线组成该移动终端的天线协作组。
7、 一种基站协作组确定方法, 其特征在于, 包括:
信号联合处理系统获得移动终端与至少两个基站之间的信道质量; 并 确定高于信道质量门限的信道质量所对应的基站组成该移动终端的基站 协作组。
8、 如权利要求 7所述的方法, 其特征在于, 所述信道质量具体为上行信 道质量; 以及
所述信号联合处理系统获得移动终端与基站之间的信道质量, 具体为: 所述移动终端向基站发送上行导频, 该基站检测所述上行导频确定所述 移动终端与该基站之间的上行信道盾量;
所述信号联合处理系统从该基站获得所述上行信道质量作为所述移动终 端与该基站之间的信道质量。
9、 如权利要求 7所述的方法, 其特征在于, 所述信道质量具体为下行信 道质量; 以及
所述信号联合处理系统获得移动终端与基站之间的信道质量, 具体为: 所述移动终端检测基站发送的下行导频, 确定与该基站之间的下行信道 质量, 并向该基站上报所述下行信道质量;
所述信号联合处理系统从该基站获得所述下行信道质量作为所述移动终 端与该基站之间的信道质量。
10、 如权利要求 7所述的方法, 其特征在于, 所述信道质量门限为一预 先设定值; 或者,
所述信道质量门限根据如下方法确定:
所述信号联合处理系统确定获得的信道质量中最高信道盾量, 以所述最 高信道质量与设定的百分比门限的乘积为所述信道质量门限。
11、 一种基站协作组确定装置, 其特征在于, 包括:
信道质量获得模块, 用于获得移动终端与至少两个基站之间的信道质量; 基站协作组确定模块, 用于确定高于信道盾量门限的信道质量所对应的 基站组成该移动终端的基站协作组。
12、 如权利要求 11所述的装置, 其特征在于, 所述基站协作组确定模块 包括:
最高信道质量确定单元, 用于确定所述信道质量获得模块获得的信道质 量中最高信道质量;
信道质量门限确定单元, 用于以所述最高信道质量确定单元确定的最高 信道质量与设定的百分比门限的乘积为所述信道质量门限;
基站协作组确定单元, 用于确定高于所述信道质量门限确定单元确定的 信道质量门限的信道盾量所对应的基站组成该移动终端的基站协作组。
PCT/CN2009/001549 2008-12-24 2009-12-24 天线协作组确定方法和装置、基站协作组确定方法和装置 WO2010072053A1 (zh)

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