WO2012037730A1 - Procédé et système permettant de détecter la capacité d'un terminal mobile de supporter une suppression et une annulation d'interférences - Google Patents

Procédé et système permettant de détecter la capacité d'un terminal mobile de supporter une suppression et une annulation d'interférences Download PDF

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Publication number
WO2012037730A1
WO2012037730A1 PCT/CN2010/077299 CN2010077299W WO2012037730A1 WO 2012037730 A1 WO2012037730 A1 WO 2012037730A1 CN 2010077299 W CN2010077299 W CN 2010077299W WO 2012037730 A1 WO2012037730 A1 WO 2012037730A1
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WIPO (PCT)
Prior art keywords
mobile terminal
interference
downlink
interference suppression
support capability
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PCT/CN2010/077299
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English (en)
Chinese (zh)
Inventor
申建平
柯昌伟
王欣晖
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中兴通讯股份有限公司
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Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to PCT/CN2010/077299 priority Critical patent/WO2012037730A1/fr
Publication of WO2012037730A1 publication Critical patent/WO2012037730A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks

Definitions

  • the present invention relates to the field of interference suppression technologies in mobile communication systems, and in particular, to a method and system for detecting interference suppression cancellation support capabilities of mobile terminals. Background technique
  • GSM Global System for Mobile Communications
  • BSC Base Station Controller
  • BTS Base Station
  • the BTS can be collectively referred to as a base station subsystem (BSS, Base Station Subsystem); wherein, the interface between the core network and the BSC is called an A interface, and the interface between the BSC and the BTS is called an Abis interface, and the BTS and the mobile terminal are The interface between them is called the Um interface.
  • BSS Base Station Subsystem
  • the core network, BSC and BTS work together to provide complete mobile voice services to the mobile terminal.
  • GSM wireless networks are covered and served by several base stations. GSM commercial wireless networks often require dozens or even hundreds of base stations to complete coverage and meet traffic demands.
  • the GSM network can use very limited frequency resources. This creates a contradiction.
  • the GSM system uses a cellular structure to resolve the contradiction between the demand for traffic and the limited frequency resources of the mobile communication system.
  • the frequency reuse method brought by the cellular structure inevitably introduces a considerable amount of co-channel interference and adjacent-channel interference to the GSM network, and the interference levels of these co-channel interference and adjacent-channel interference are closely related to the frequency reuse. More severe, making the GSM network a network with limited interference.
  • HSPA+ High Speed Packet Access
  • LTE Long Term Evolution
  • the more compact frequency reuse method for the GSM system is one of the ways to solve the spectrum resource dilemma, but obviously, This tighter frequency reuse will inevitably lead to more co-channel interference and adjacent-channel interference, and also make the GSM network a more interference-limited network.
  • single-antenna interference suppression cancellation technology enables mobile terminals to take advantage of this technology in eliminating interference and achieve good voice processing performance in interference-limited environments. For example, some mobile terminals that support single-antenna interference suppression can still achieve good voice processing performance in the case of co-channel interference of OdB or 3dB.
  • the single antenna interference suppression cancellation technology enables the base station subsystem to allocate some relatively large interference and poor quality channels to mobile terminals supporting single antenna interference suppression cancellation technology, instead of being allocated to traditional mobile terminals that do not support the technology. Through such processing, it is possible to obtain good overall network performance in an environment where interference is limited.
  • the mobile terminal presents a complex form for reporting the single-antenna interference suppression cancellation support capability: Some mobile terminals report their single-antenna interference suppression cancellation support capability, but the actual interference processing Not ideal; some mobile terminals, although not reporting their single-antenna interference suppression cancellation support capabilities, have higher actual interference handling capabilities. Therefore, the base station subsystem needs to use a technical means to robustly detect the true single antenna interference suppression cancellation support capability of the mobile terminal.
  • the base station subsystem can use the method of applying the same-frequency interference to the Time Division Multiple Access (TDMA) frame to detect the support capability of the single-antenna interference suppression cancellation of the mobile terminal.
  • TDMA Time Division Multiple Access
  • the method needs to apply the same-frequency interference to the plurality of voice frames of one or more multi-frame periods continuously, so that the voice quality is degraded during the detection process, thereby affecting the user's sensitivity.
  • the main object of the present invention is to provide a method and system for detecting a single antenna interference suppression cancellation support capability of a mobile terminal in a GSM network without affecting voice quality to the greatest extent, thereby ensuring voice.
  • the robustness of the call enables the GSM network to achieve good overall network performance in environments with limited interference.
  • the present invention provides a method for detecting interference suppression cancellation support capability of a mobile terminal, the method comprising:
  • the base station subsystem determines a mobile terminal that needs to be aware of the single antenna interference suppression cancellation support capability
  • the BSS applies one or more rounds of co-channel interference to a specific subset of downlink time division multiple access (TDMA) frames of the mobile terminal that is determined to be capable of performing single antenna interference suppression cancellation support, and analyzes the mobile terminal during the application of the same frequency interference.
  • TDMA downlink time division multiple access
  • the BSS determines a mobile terminal that needs to be aware of the single antenna interference suppression cancellation support capability, and specifically: a parameter, determining whether it is necessary to learn the single antenna interference suppression cancellation support capability of the mobile terminal; or
  • the BSS determines whether it is necessary to know the single antenna interference suppression cancellation support capability of the mobile terminal served by the carrier or the cell based on the traffic load.
  • the related parameters embodying the interference processing capability of the mobile terminal include at least one of the following: downlink advanced receiver performance (DARP) capability, downlink received signal quality, and downlink received signal strength.
  • DARP downlink advanced receiver performance
  • the method further includes:
  • the specific subset of the TDMA frame of the mobile terminal is a TDMA frame corresponding to the downlink subset received signal quality and the downlink subset received signal strength in the downlink measurement report defined by 3GPP TS 45.008.
  • the method further includes:
  • the BSS applies one or more rounds of co-channel interference to a specific subset of downlink TDMA frames of the mobile terminal by a stepwise comparison method or a predefined comparison method.
  • the interference signal of the same frequency interference is:
  • GMSK Gaussian filter minimum frequency shift keying
  • QPSK Adaptive Quadrature Phase Shift Keying
  • the downlink subset received signal related parameter includes at least one of the following: a downlink subset received signal quality, and a downlink subset received signal strength;
  • the present invention also provides a system for detecting interference suppression cancellation support capability of a mobile terminal, the system comprising: a terminal determining module, configured to determine a mobile terminal that needs to learn the single antenna interference suppression cancellation support capability;
  • the interference implementation and analysis judging module is configured to apply one or more rounds of co-channel interference to a specific subset of downlink TDMA frames of the mobile terminal that is determined to be required to perform single-antenna interference suppression cancellation support capability, and analyze and apply the intra-frequency interference period
  • the downlink subset of the one or more measurement reports reported by the terminal receives the signal related parameter, and accordingly determines whether the mobile terminal has the single antenna interference suppression cancellation support capability.
  • the terminal determining module is further configured to: determine, by using a related parameter of the mobile terminal interference processing capability that is reported by the mobile terminal, whether the single antenna interference suppression cancellation support capability of the mobile terminal needs to be learned; or
  • the related parameters embodying the interference processing capability of the mobile terminal include at least one of the following: a DARP capability, a downlink received signal quality, and a downlink received signal strength.
  • the specific subset of the TDMA frame of the mobile terminal is a TDMA frame corresponding to the downlink subset received signal quality and the downlink subset received signal strength in the downlink measurement report defined by 3GPP TS 45.008.
  • the interference implementation and analysis determination module is further configured to apply one or more rounds of co-channel interference to a specific subset of downlink TDMA frames of the mobile terminal by using a stepwise comparison method or a predefined comparison method.
  • the interference signal of the same frequency interference is:
  • the downlink subset received signal related parameter includes at least one of the following: a downlink subset received signal quality, and a downlink subset received signal strength;
  • the interference implementation and analysis determining module is further configured to compare the downlink subset received signal related parameter with a preset threshold threshold, and if it is better than the threshold threshold, determine that the mobile terminal has a single The antenna interference suppression cancels the support capability; otherwise, it is determined that the mobile terminal does not have the single antenna interference suppression cancellation support capability.
  • the present invention provides a method and system for detecting interference cancellation cancellation support capability of a mobile terminal, and determining a mobile terminal that needs to learn the single antenna interference suppression cancellation support capability, and the mobile terminal that is determined to be required to perform single antenna interference suppression cancellation support capability Applying one or more rounds of co-channel interference to a specific subset of the downlink TDMA frames of the terminal; analyzing the downlink subset received signal quality and the downlink subset received signal in the one or more measurement reports reported by the mobile terminal corresponding to the intra-frequency interference period The strength and other related parameters determine whether the mobile terminal has the single antenna interference suppression cancellation support capability.
  • the invention can detect the single antenna interference suppression cancellation support capability of the mobile terminal without affecting the voice quality to the greatest extent, thereby ensuring the robustness of the voice call, and enabling the GSM network to be in an environment with limited interference. Still get good overall network performance.
  • FIG. 1 is a schematic diagram of a network architecture of a GSM in the prior art
  • FIG. 2 is a flowchart of a method for detecting interference cancellation cancellation support capability of a mobile terminal according to the present invention
  • FIG. 3 is a flowchart of a method for detecting interference cancellation suppression support capability of a mobile terminal by using a stepwise comparison method according to an embodiment of the present invention
  • FIG. 4 is a flowchart of a method for detecting interference suppression cancellation support capability of a mobile terminal by using a predefined comparison method according to an embodiment of the present invention
  • FIG. 5 is a schematic diagram of the BSS applying interference to a downlink TDMA frame subset for full rate speech coding according to an embodiment of the present invention
  • FIG. 6 is a half-rate speech coding, BSS versus downlink TDMA frame according to an embodiment of the present invention; a schematic diagram of the application of interference;
  • FIG. 7 is a schematic diagram of the BSS applying interference to a downlink TDMA frame subset for adaptive multi-rate speech coding according to an embodiment of the present invention, wherein the number of SID-UPDATE frames is 3;
  • FIG. 8 is a schematic diagram of the BSS applying interference to a downlink TDMA frame subset for adaptive multi-rate speech coding according to an embodiment of the present invention, wherein the number of SID-UPDATE frames is 1;
  • FIG. 9 is a schematic diagram of a system structure for detecting interference cancellation cancellation support capability of a mobile terminal according to the present invention. detailed description
  • a method for detecting interference cancellation cancellation support capability of a mobile terminal according to the present invention mainly includes the following steps:
  • Step 201 The base station subsystem (BSS) determines a mobile terminal that needs to learn the single antenna interference suppression cancellation support capability.
  • BSS base station subsystem
  • the BSS can determine whether it needs to be known by the relevant parameters of the mobile terminal's interference processing capability, such as the downlink advanced receiver performance (DARP, Downlink Advanced Receiver Performance) capability, the downlink received signal quality, and the downlink received signal strength reported by the mobile terminal.
  • DARP Downlink Advanced Receiver Performance
  • the single antenna interference suppression elimination support capability of the mobile terminal is the downlink advanced receiver performance (DARP, Downlink Advanced Receiver Performance) capability, the downlink received signal quality, and the downlink received signal strength reported by the mobile terminal.
  • DARP Downlink Advanced Receiver Performance
  • the BSS determines whether it is necessary to learn the single antenna interference suppression cancellation support capability of one or some mobile terminals served by certain carrier frequencies or cells based on the measurement results of the uplink;
  • the BSS determines whether it is necessary to know the single antenna interference rejection cancellation support capability of some or some of the mobile terminals served by certain carrier frequencies or cells based on the traffic load.
  • Step 202 The BSS applies one or more rounds of co-channel interference to a specific subset of downlink TDMA frames of the mobile terminal that is determined to be required to perform single-antenna interference suppression cancellation support capability.
  • the BSS analyzes one of the corresponding mobile terminal reports during the intra-frequency interference period. Or a downlink subset of the plurality of measurement reports, the received signal quality, the downlink subset received signal strength, and the like, and the mobile terminal is determined according to the Does it have single antenna interference suppression cancellation support capability.
  • step 202 the specific subset of downlink TDMA frames of the mobile terminal to which the co-channel interference is applied is: corresponding to the downlink subset received signal quality and the downlink subset received signal strength in the downlink measurement 4 report defined in 3GPP TS45.008 TDMA frame.
  • step 202 one or more rounds of the same frequency are applied, and one of the following two methods can be used.
  • Method 1 Gradual comparison method. Applying a round of co-channel interference to a specific subset of downlink TDMA frames, the power strength and duration of the applied co-channel interference can be set according to the BSS policy, and then analyzing one or more measurements reported by the mobile terminal during the application of the same-frequency interference.
  • the downlink subset of the report receives the signal quality, the downlink subset received signal strength and other related parameters, for example, whether these parameters are better than the set threshold threshold, and the BSS determines whether to continue to apply the same-frequency interference based on the analysis result.
  • the power intensity and duration of applying the co-channel interference can be set according to the BSS strategy, which can be equivalent to the corresponding setting of the previous round or different from the previous round. Settings. Then, the BSS analyzes the downlink sub-set received signal quality, the downlink subset received signal strength, and the like in one or more measurement reports reported by the mobile terminal during the same-frequency interference, for example, whether the parameters are better than the set
  • the threshold threshold value the threshold threshold value can be equivalent to the corresponding setting of the previous round, or can be different from the corresponding setting of the previous round.
  • the BSS determines whether to continue to apply co-channel interference based on the analysis results. By analogy, until the BSS considers that the single-antenna interference suppression cancellation capability of the mobile terminal can be obtained, the process of the BSS robustly learning the single-antenna interference suppression cancellation capability of the mobile terminal is completed.
  • Method 2 Predefined comparison method.
  • the same-frequency interference can be applied to a specific subset of the downlink TDMA frame, and the downlink interference can also be performed.
  • a certain subset of TDMA frames does not impose co-channel interference.
  • Whether a round of detection detects the same frequency interference on a specific subset of downlink TDMA frames can be set according to the BSS policy (for example, in the first, second, fourth, fifth, seventh, eighth, and tenth rounds of detection, The same frequency set interference is applied to a specific subset of the TDMA frame, and the same frequency interference is not applied to the specific subset of the downlink TDMA frame when the 3rd, 6th, and 9th rounds are detected.
  • the power intensity and duration of the applied co-channel interference can also be based on BSS strategy to set. Until the predefined X-round detection is all completed.
  • the downlink subset received signal quality and the downlink subset received signal strength and other related parameters in one or more measurement reports reported by the mobile terminal are obtained by the mobile terminal's single antenna interference suppression cancellation capability, and thus, the completion is completed.
  • the BSS robustly learns the process of the single antenna interference suppression cancellation capability of the mobile terminal.
  • the BSS can analyze the downlink subset received signal quality, the downlink subset received signal strength, and other related parameters in the measurement report reported by the mobile terminal after the same-frequency interference, and combine various related thresholds preset by the BSS.
  • the value is used to determine the single antenna interference suppression cancellation capability of the mobile terminal.
  • the specific parameters of the determination of the single antenna interference suppression cancellation capability of the mobile terminal such as applying several rounds of co-channel interference, the power intensity and duration of the applied co-channel interference, and the set threshold threshold for judging, etc. It can be implemented according to the strategy of BSS.
  • the modulation method of the co-channel interference applied by the BSS may be various.
  • the co-channel interference is a phase of the measured signal phase modulated by Gaussian Filtered Minimum Shift Keying (GMSK).
  • GMSK Gaussian Filtered Minimum Shift Keying
  • Adaptive QPSK modulation can utilize the methods provided in the existing 3GPP TS 45.004. Same frequency The scrambling signal uses a different training sequence than the signal to be measured.
  • the BSS analyzes the measurement report reported by the mobile terminal, and combines the measurement report of the same-frequency interference back-feed feedback by applying one or more rounds of detection to the specific subset of the downlink TDMA frame of the mobile terminal.
  • the method of single antenna interference suppression cancellation support capability of the mobile terminal is further elaborated.
  • the mobile terminal is in the dedicated mode, and the BSS applies the same-frequency interference to the specific subset of the downlink TDMA frame by the step-by-step comparison method, and robustly learns the single-antenna interference suppression cancellation support capability of the mobile terminal;
  • the specific operations mainly include the following steps:
  • Step 301 The BSS determines, by using a related parameter that reflects the interference handling capability of the mobile terminal in the measurement report sent by the mobile terminal, such as a received signal quality of the complete set, to determine a mobile terminal that needs to perform single antenna interference suppression to eliminate the support capability.
  • a related parameter that reflects the interference handling capability of the mobile terminal in the measurement report sent by the mobile terminal such as a received signal quality of the complete set
  • the BSS can use multiple methods, for example, the relevant parameters in the measurement report transmitted by the mobile terminal that reflect the interference processing capability of the mobile terminal, such as the received signal quality of the complete set and the received signal strength of the complete set to determine the mobile terminal; or, the BSS is based on the uplink.
  • Single antenna interference suppression cancellation support capability for one or some mobile terminals of the service may be used.
  • the mobile terminal that needs to perform the single antenna interference suppression cancellation support capability is determined by using relevant parameters in the measurement report transmitted by the mobile terminal to reflect the interference processing capability of the mobile terminal, such as the received signal quality of the complete set.
  • Step 302 The BSS applies the same-frequency interference with the QPSK modulation of the measured signal to the downlink TDMA frame specific subset of the mobile terminal that is determined to be required to perform the single-antenna interference suppression cancellation support capability.
  • the modulation method of the co-channel interference applied by the BSS can be various, for example, the co-channel interference is one.
  • the power of the same-frequency interference can also be varied, such as the power of the same-frequency interference and the measured signal, or the same-frequency interference is 3 dB higher than the measured signal.
  • the same-frequency interference with the QPSK modulation of the measured signal is applied to a specific subset of the downlink TDMA frames of the mobile terminal, and the power of the same-frequency interference is higher than the measured signal power by 3 dB.
  • Step 303 The BSS applies the co-channel interference to a specific subset of downlink TDMA frames belonging to the same mobile terminal, and applies the same to a specific subset of downlink TDMA frames belonging to the same mobile terminal in each 104 multiframe in units of 104 multiframes. Frequency interference.
  • the frame number pair 104 is taken over (ie, frame number mod 104), and the result of the remainder is equal to (52, 53, 54, 55, 56, 57, 58, 59)
  • the frames belong to a specific subset of downlink TDMA frames to which the co-channel interference is applied; the SACCH frame also belongs to a particular subset of downlink TDMA frames, and the co-channel interference to the SACCH frame is applied to the position of the SACCH frame.
  • the frame number pair 104 is reserved (ie, frame number mod 104), and the remaining results are equal to (0, 2, 4, 6, 52, 54, 56, 58).
  • a frame of a sub-channel mobile terminal belonging to a specific subset of downlink TDMA frames the co-channel interference is applied to these; the SACCH frame of the mobile terminal in the first sub-channel also belongs to a specific subset of the downlink TDMA frame, to the SACCH frame Co-channel interference is applied to the position of the SACCH frame.
  • the frame number of its SID-UPDATE frame has neither a fixed position nor a fixed number, when the discontinuous transmission is off, there is no SID-UPDATE frame, and thus belongs to a specific subset of the downlink TDMA frame at this time.
  • the frame is only a SACCH frame; when the discontinuous transmission is turned on, the frames in the SID_UPDATE frame position are all SID_UPDATE frames, and the number of these SID UPDATE frames can be 1 in a hard frame of 104 times in a measurement report period. , can also be Multiple, these frames belong to a specific subset of TDMA frames, which are applied to the SID-UPDATE frame that occurs.
  • the SACCH frame also belongs to a specific subset of downlink TDMA frames, and co-channel interference to the SACCH frame is applied to all SACCH frames.
  • the number of SID_UPDATE frames is three is used.
  • FIG. 5 For the full-rate speech coding, a schematic diagram of the BSS applying interference to a specific subset of the downlink TDMA frames is shown in FIG. 5; for half-rate speech coding, a schematic diagram of the BSS applying interference to a specific subset of the downlink TDMA frames is shown in FIG. 6;
  • FIG. 5 and Fig. 6 For adaptive multi-rate speech coding, a schematic diagram of the BSS applying interference to a particular subset of downlink TDMA frames is shown in FIG.
  • ⁇ denotes a traffic channel
  • ⁇ denotes SACCH
  • ⁇ denotes an idle (IDLE) channel
  • ⁇ denotes an interference signal
  • Fig. 7 ⁇ denotes no data (NO DATA ), indicating SID UPDATE, ⁇ indicates
  • Step 304 Acquire relevant parameters such as downlink subset received signal quality, downlink subset received signal strength, and the like in one or more measurement reports reported by the mobile terminal during intra-channel interference.
  • the first method is to obtain an average value of the received signal quality parameter values in the downlink subset of the consecutive consecutive measurement reports
  • the second method is to obtain a standard deviation by using a downlink subset received signal quality parameter value in a continuous and recent downlink subset received signal quality less than a specific threshold value TO (for example, less than 2);
  • the third method is to combine the received signal quality of the downlink subset and the received signal strength of the downlink subset in the downlink measurement report, for example, only in the downlink of the measurement report that includes the downlink subset received signal strength less than a certain threshold value T1.
  • the subset receives the signal quality parameter value to obtain an average value;
  • the fourth method is to combine the received signal quality of the downlink subset in the downlink measurement report and the received signal strength of the downlink subset, for example, only the received signal strength of the downlink subset is less than a certain
  • the downlink subset received signal quality parameter values in the measurement report of the threshold value T2 are obtained by standard deviation.
  • the subset receives the signal quality parameter values for the standard deviation.
  • Step 305 The BSS compares the two types of parameter values, such as the downlink subset received signal quality and the downlink subset received signal strength, according to the acquisition result of step 304, and compares with a preset threshold threshold, if the result of step 304 is better than If the threshold value is preset, the interference suppression capability of the terminal is considered to be strong, and the mobile terminal supporting single-antenna interference suppression cancellation may be considered as a mobile terminal that supports single-antenna interference suppression cancellation.
  • the threshold value is preset, the interference suppression capability of the terminal is considered to be strong, and the mobile terminal supporting single-antenna interference suppression cancellation may be considered as a mobile terminal that supports single-antenna interference suppression cancellation.
  • the interference suppression capability of the terminal is considered to be strong, which may be supported.
  • a specific threshold value RQAVG1 for example, less than 2
  • Method 2 if N consecutively recent, the downlink subset receives a signal quality less than a specific threshold value TO (such as less than 2), the standard deviation of the downlink subset received signal quality parameter value is less than a specific threshold If the threshold RQCV1 (for example, less than 0.05), the interference suppression capability of the terminal is considered to be strong, and the mobile terminal supporting single-antenna interference suppression cancellation may be used;
  • a specific threshold value TO such as less than 2
  • the threshold RQCV1 for example, less than 0.05
  • the interference suppression capability of the terminal is considered to be strong, and the mobile terminal supporting single-antenna interference suppression cancellation may be used;
  • Method 3 if the downlink subset received signal strength is less than a threshold threshold T1 (for example, less than -65dBm), the downlink subset received signal quality parameter value is less than the threshold threshold RQAVG2 (for example, less than 2), then
  • the terminal has strong interference suppression capability, and may be a mobile terminal supporting single antenna interference suppression cancellation;
  • the terminal has strong interference suppression capability, and may be a mobile terminal that supports single antenna interference suppression cancellation.
  • Step 306 for a mobile terminal that may support single antenna interference suppression cancellation
  • BSS can be handled in a variety of ways, such as:
  • step 307 the BSS decides to continue to apply another round of co-channel interference based on the result.
  • the power intensity and duration of applying the co-channel interference can be set according to the strategy of the base station subsystem, which can be equivalent to the corresponding setting of the previous round. , can also be different from the corresponding settings in the previous round.
  • the BSS analyzes the received signal quality, the received signal strength, and the like in one or more measurement reports reported by the mobile terminal during the same-frequency interference, for example, whether the parameters are better than a set threshold threshold,
  • the threshold threshold can be equivalent to the corresponding setting of the previous round, or it can be different from the corresponding setting of the previous round.
  • BSS can be implemented in various ways according to the specific application environment and implementation characteristics. For example: In the maximum possible mode, in the judgment result after applying the same-frequency interference in each round, as long as the result is that the mobile terminal has the single-antenna interference suppression cancellation capability, the mobile terminal is considered to have single-antenna interference suppression cancellation. Capability; or use the strongest limit principle. In each round of judgments after applying the same-frequency interference, only the result of each judgment considers that the mobile terminal has single-antenna interference suppression cancellation capability, and the mobile terminal is considered to have Single antenna interference suppression cancellation capability.
  • the BSS For the judgment result of the mobile terminal which does not support the single antenna interference suppression cancellation, the BSS considers that the process of robustly knowing the capability of the mobile terminal ends, and executes step 307.
  • Step 307 the process of the BSS robustly learning the single antenna interference suppression cancellation capability of the mobile terminal ends.
  • the mobile terminal is in the dedicated mode, and the BSS applies the same-frequency interference to the specific subset of the downlink TDMA frame by using the predefined comparison method, and robustly learns the single-antenna interference suppression cancellation support capability of the mobile terminal.
  • the specific operations mainly include the following steps: Parameters, such as DARP capability, full set received signal quality, etc., to determine the mobile terminal that needs to be aware of the single antenna interference suppression cancellation support capability.
  • the BSS can use a plurality of methods, for example, the mobile terminal can determine the mobile terminal by using relevant parameters of the mobile terminal interference processing capability, such as DARP capability, full set received signal quality, and full set received signal strength; or, the BSS is based on Uplink measurements to determine the need to know the single antenna interference suppression cancellation support capability of some or some mobile terminals served by certain carrier frequencies or cells; or, the BSS determines based on the traffic load to be aware of certain carrier frequencies or Single antenna interference suppression cancellation support capability of one or some mobile terminals of the cell service.
  • relevant parameters of the mobile terminal interference processing capability such as DARP capability, full set received signal quality, and full set received signal strength
  • the BSS is based on Uplink measurements to determine the need to know the single antenna interference suppression cancellation support capability of some or some mobile terminals served by certain carrier frequencies or cells
  • the BSS determines based on the traffic load to be aware of certain carrier frequencies or Single antenna interference suppression cancellation support capability of one or some mobile terminals of the cell service.
  • each round detection corresponds to one measurement report period (ie, one 104 multiframe)
  • each round In-detection may apply co-channel interference to a specific subset of downlink TDMA frames, or may not apply co-channel interference to a specific subset of downlink TDMA frames.
  • Whether a round of detection detects that the same frequency interference is applied to a specific subset of downlink TDMA frames may be set according to the BSS policy (for example, when detecting 1, 2, 4, 5, 7, 8, 10, 11, 13, 14 rounds; Applying co-channel interference to a specific subset of downlink TDMA frames, no co-channel interference for a specific subset of downlink TDMA frames when detecting 3rd, 6th, 9th, and 12th rounds, power intensity and duration of co-channel interference applied Can be set according to the BSS policy.
  • Step 403 The BSS applies the same-frequency interference with the QPSK modulation of the measured signal to the downlink TDMA frame specific subset of the mobile terminal that is determined to be required to perform the single-antenna interference suppression cancellation support capability.
  • the modulation method of co-channel interference applied by the BSS can be various.
  • the co-channel interference is an interference signal with the same phase as the signal to be measured modulated by GMSK, or a GMSK with a phase difference of two from the measured signal.
  • the modulated signal can be embodied as an adaptive QPSK modulated signal composed of the measured signal.
  • the power of the same-frequency interference can be various, such as the power of the same-frequency interference and the measured signal, or the same-frequency interference is 3 dB higher than the measured signal.
  • the same-frequency interference with the QPSK modulation of the measured signal is applied to a specific subset of the downlink TDMA frames of the mobile terminal, and the power of the same-frequency interference is higher than the measured signal power by 3 dB.
  • Step 404 The BSS applies the co-channel interference to a specific subset of downlink TDMA frames belonging to the same mobile terminal, and applies the same to a specific subset of downlink TDMA frames belonging to the same mobile terminal in each 104 multiframe in units of 104 multiframes. Frequency interference.
  • the frame number pair 104 is taken over (ie, frame number mod 104), and the result of the remainder is equal to (52, 53, 54, 55, 56, 57, 58, 59)
  • Frames belong to a specific subset of TDMA frames, and the same frequency is applied to these frames;
  • SACCH frames also belong to a specific subset of TDMA frames, and co-channel interference to SACCH frames is applied to the position of the SACCH frame.
  • the frame number pair 104 is reserved (ie, frame number mod 104), and the remaining results are equal to (0, 2, 4, 6, 52, 54, 56, 58).
  • a frame of a sub-channel mobile terminal belonging to a specific subset of downlink TDMA frames the co-channel interference is applied to these; the SACCH frame of the mobile terminal in the first sub-channel also belongs to a specific subset of the downlink TDMA frame, to the SACCH frame Co-channel interference is applied to the position of the SACCH frame.
  • the frame number of its SID-UPDATE frame has neither a fixed position nor a fixed number, when the discontinuous transmission is off, there is no SID-UPDATE frame, and thus belongs to a specific subset of the downlink TDMA frame at this time.
  • the frame is only a SACCH frame; when the discontinuous transmission is turned on, the frames in the SID_UPDATE frame position are all SID_UPDATE frames, and in one 104 multiframe corresponding to one measurement report, the number of these SID_UPDATE frames can be 1 There may be multiple, these frames belong to a specific subset of downlink TDMA frames, and the same-frequency interference is applied to the SID-UPDATE frame that appears.
  • the SACCH frame also belongs to a specific subset of downlink TDMA frames, and co-channel interference to the SACCH frame is applied to all SACCH frames.
  • an example in which the number of SID_UPDATE frames is one is used.
  • FIG. 5 For the full-rate speech coding, a schematic diagram of the BSS applying interference to a specific subset of the downlink TDMA frames is shown in FIG. 5; for half-rate speech coding, a schematic diagram of the BSS applying interference to a specific subset of the downlink TDMA frames is shown in FIG. 6;
  • For adaptive multi-rate speech coding a schematic diagram of the BSS applying interference to a particular subset of downlink TDMA frames is shown in FIG. In Fig. 5 and Fig.
  • ⁇ denotes a traffic channel
  • ⁇ denotes SACCH
  • ⁇ denotes an idle (IDLE) channel
  • ⁇ denotes an interference signal
  • NO DATA no data
  • SID UPDATE denotes SID UPDATE
  • voice/ Open Speech / Onset
  • ⁇ indicates IDLE channel
  • ⁇ indicates SACCH
  • ⁇ indicates interference signal.
  • Step 406 the process of the BSS robustly learning the single antenna interference suppression cancellation capability of the mobile terminal ends.
  • the present invention further provides a system for detecting the interference suppression cancellation support capability of the mobile terminal.
  • the system includes: the terminal determination module 10 and the interference implementation and analysis Judgment module 20.
  • the terminal determining module 10 is configured to determine a mobile terminal that needs to learn the single antenna interference suppression cancellation support capability.
  • the interference implementation and analysis judging module 20 is configured to apply one or more rounds of co-channel interference to a specific subset of downlink TDMA frames of the mobile terminal that is determined to be required to perform single-antenna interference suppression cancellation support capability, and analyze the period of applying the same-frequency interference.
  • the downlink subset received signal related parameter downlink subset received signal quality and/or downlink subset received signal strength
  • the terminal determining module 10 is further configured to: embody the mobile by using the mobile terminal a parameter related to the terminal interference processing capability (DARP capability, downlink received signal quality, and/or downlink received signal strength), determining whether the single antenna interference suppression cancellation support capability of the mobile terminal needs to be known; or determining based on the uplink measurement result Whether it is necessary to know the single antenna interference suppression cancellation support capability of the mobile terminal served by the carrier frequency or the cell; or, based on the traffic load, determine whether it is necessary to know the single antenna interference suppression cancellation support capability of the mobile terminal served by the carrier or the cell.
  • DARP capability terminal interference processing capability
  • downlink received signal quality downlink received signal quality
  • downlink received signal strength downlink received signal strength
  • the interference implementation and analysis decision module 20 may apply one or more rounds of co-channel interference to a particular subset of downlink TDMA frames of the mobile terminal by a stepwise comparison method or a predefined comparison method.
  • the interference implementation and analysis determining module 20 is further configured to compare the downlink subset received signal related parameter with a preset threshold threshold, and if the threshold is wider than the threshold, determine that the mobile terminal has single antenna interference suppression cancellation support. Capability; otherwise, it is determined that the mobile terminal does not have single antenna interference suppression cancellation support capability.
  • the present invention can detect the single antenna interference suppression cancellation support capability of the mobile terminal without affecting the voice quality to the greatest extent, thereby ensuring the robustness of the voice call and enabling the GSM network to be interfered with. In a limited environment, still get good overall network performance.

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

Abstract

La présente invention concerne un procédé et un système permettant de détecter la capacité d'un terminal mobile de supporter une suppression et une annulation d'interférences. Le procédé consiste à : déterminer, par un sous-système de station de base (BSS), un terminal mobile pour lequel doit être effectuée une acquisition de capacité de SAIC (annulation d'interférences au moyen d'une antenne unique); appliquer, par le BSS, un ou plusieurs cycles d'interférences entre canaux au terminal mobile déterminé pour lequel doit être effectuée une acquisition de capacité de SAIC; analyser, par le BSS, des paramètres connexes dans un ou plusieurs rapports de mesure communiqués par le terminal mobile durant des périodes d'application des interférences entre canaux, les paramètres connexes comprenant une qualité du signal reçu et une intensité du signal reçu d'un sous-ensemble de liaison descendante, etc.; et estimer en conséquence si le terminal mobile a la capacité de supporter une SAIC. Avec la présente invention, la capacité du terminal mobile de supporter la SAIC peut être détectée sous les conditions préalables que la qualité vocale n'est pas influencée au maximum, la robustesse des communications vocales peut donc être garantie au point que de bonnes performances d'ensemble du réseau puissent être encore acquises par le réseau GSM dans l'environnement à interférences limitées.
PCT/CN2010/077299 2010-09-26 2010-09-26 Procédé et système permettant de détecter la capacité d'un terminal mobile de supporter une suppression et une annulation d'interférences WO2012037730A1 (fr)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013062460A1 (fr) * 2011-10-26 2013-05-02 Telefonaktiebolaget L M Ericsson (Publ) Procédés et nœuds de réseau pour déterminer une indication de réduction du brouillage et pour programmer une transmission

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CN101133670A (zh) * 2005-01-26 2008-02-27 松下电器产业株式会社 无线基站和终端装置
WO2009121391A1 (fr) * 2008-03-31 2009-10-08 Nokia Siemens Networks Oy Procédé et dispositif pour tester la capacité d'une station mobile à traiter au moins un second canal, et système de communication comprenant un tel dispositif
CN101938437A (zh) * 2010-09-15 2011-01-05 华为技术有限公司 单天线干扰消除能力识别方法和装置

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Publication number Priority date Publication date Assignee Title
CN101133670A (zh) * 2005-01-26 2008-02-27 松下电器产业株式会社 无线基站和终端装置
WO2009121391A1 (fr) * 2008-03-31 2009-10-08 Nokia Siemens Networks Oy Procédé et dispositif pour tester la capacité d'une station mobile à traiter au moins un second canal, et système de communication comprenant un tel dispositif
CN101938437A (zh) * 2010-09-15 2011-01-05 华为技术有限公司 单天线干扰消除能力识别方法和装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013062460A1 (fr) * 2011-10-26 2013-05-02 Telefonaktiebolaget L M Ericsson (Publ) Procédés et nœuds de réseau pour déterminer une indication de réduction du brouillage et pour programmer une transmission
US9794812B2 (en) 2011-10-26 2017-10-17 Telefonaktiebolaget L M Ericsson Methods and network nodes for determining an indication of interference mitigation and for scheduling a transmission

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