WO2005122449A1 - Procede permettant de verifier la validite d'une liste de modes de compression - Google Patents

Procede permettant de verifier la validite d'une liste de modes de compression Download PDF

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Publication number
WO2005122449A1
WO2005122449A1 PCT/CN2005/000780 CN2005000780W WO2005122449A1 WO 2005122449 A1 WO2005122449 A1 WO 2005122449A1 CN 2005000780 W CN2005000780 W CN 2005000780W WO 2005122449 A1 WO2005122449 A1 WO 2005122449A1
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WO
WIPO (PCT)
Prior art keywords
gap
frames
compression mode
consecutive
occupied
Prior art date
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PCT/CN2005/000780
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English (en)
Chinese (zh)
Inventor
Shilin Pan
Pingping Xing
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Huawei Technologies Co., Ltd.
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Publication date
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Publication of WO2005122449A1 publication Critical patent/WO2005122449A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received

Definitions

  • the invention relates to the technical field of code division multiple access (CDMA) communication system switching, and in particular, to a method for checking the validity of a compressed mode pattern sequence during a switching process.
  • CDMA code division multiple access
  • FDD frequency division multiplexing
  • TDD time division multiplexing
  • inter-system handover preparation user equipment (UE) is required to measure the target cell of the handover.
  • the frequencies of these measurements are generally different from the frequencies at which the current UE works, and inter-frequency measurements or inter-system measurements need to be performed. Since a set of transceivers can only work on a set of transmitting and receiving frequencies at the same time, to measure signals of other frequencies, the receiver needs to stop working and switch the frequency to the target frequency for measurement. Therefore, a mechanism is needed to generate a certain idle time slot in the downlink radio frame. This is the compressed mode.
  • the compression mode is shown in Figure 1.
  • the upper part of the figure is a wireless frame with gaps, and the lower part of the figure is a partial enlargement of a wireless frame with a gap.
  • the gap is halved by a spreading factor, code puncturing, etc.
  • the transmission data gap (GAP) formed by technology for a period of time.
  • the base station does not transmit any data to the radio.
  • the UE can use GAP to convert its RF receiver to the target frequency to be monitored and measure the target frequency.
  • a specific compression mode pattern is generated, and all the compression mode patterns invoked during multiple measurement processes at the same time form a sequence of compression mode patterns.
  • the configuration parameters of a compressed mode pattern are shown in FIG. 2, and one cycle of the compressed mode pattern illustrated in FIG. 2 includes two segments of a transmission gap pattern 1 (TG pattern1) and a transmission gap pattern 2 (TG pattern2).
  • the length of transmission gap mode 1 (TGPL1) and the length of transmission gap mode 2 (TGPL2) determine the cycle length of the compression mode pattern, the transmission slot start slot number (TGSN), the length of transmission gap 1 (TGL1), and the transmission gap 2
  • the length (TGL2) and transmission gap interval (TGD) determine the location of the GAP.
  • Gap 1 (GAP1) and Gap 2 (GAP2) GAP is the length of GAP, ranging from 0 to 14 slots (slots), distributed in 1 or 2 frames.
  • the transmission slot control frame slot number (TGCFN) determines the moment when the first compression mode pattern is started in the compression mode pattern sequence, and the compression gap activation time offset (DeltaCFN) is the next compression mode pattern started in the compression mode pattern. Time offset from the previous compression mode pattern started.
  • each compression mode pattern is based on its different startup time, GAP length, and cycle parameters.
  • GAP overlap When superimposed on a wireless frame, a situation in which the same frame is occupied by multiple compressed mode GAPs in the wireless frame may be caused, that is, GAP overlap may be caused.
  • the third generation mobile communication protocol stipulates that GAPs in compressed mode styles must not overlap at any time, otherwise gaps generated by multiple compressed mode styles will appear in the same radio frame and conflicts will occur. At the same time, in order to ensure the channel transmission quality during the start of the compressed mode pattern sequence, 3GPP 25.133 also specifies that the maximum number of consecutive slots allowed is two frames.
  • Each cell in Figure 3 represents a frame.
  • the frames occupied by GAP are filled with black, and the frames not occupied by GAP are not filled with color.
  • GAP occupied collision frames are filled with gray.
  • the first wireless frame is compressed mode 1, the period is 8 frames, and the third frame filled with black is occupied by GAP; the second wireless frame is compressed mode 2, the period is 8 frames, and the first filled with black are ⁇ 3 and ⁇ 3.
  • the frame has GAP occupied; the third Nai wireless frame is the result of superimposing compressed mode 1 and compressed mode 2 simultaneously.
  • the first frame is filled with black to indicate that GAP is occupied, and the third frame is filled with gray to indicate that GAP occupation conflicts.
  • the general method is to adopt a pre-configured compression mode style with a short length and a simple multiple relationship to form a style combination set. Each time the parameters are pre-configured in the background, multiple compression modes in the same group will be used. Styles are configured at the same time.
  • the radio network controller takes out the compression mode patterns required for measurement from the pattern combination set, forms a compression mode pattern sequence, and configures all the compression mode patterns in the compression mode pattern sequence.
  • the parameters are sent to the base station Node B and the UE through a signaling message. During this period, the compressed mode pattern sequence is not checked.
  • Figure 4 shows that when the delta CFN of compression mode style 2 is 1 frame compared to compression mode style 1, there is no conflict in the pre-configured compression mode styles.
  • the GAP occupied in the picture is filled with black.
  • the frames not occupied by GAP are not filled. Color, frames with GAP occupation conflicts are filled with gray.
  • the first wireless frame is compressed mode 1, with a period of 8 frames, and the third frame filled with black has GAP occupied; the second wireless frame is compressed mode 2, with a period of 8 frames, and the first filled with black has GAP Occupation; DeltaCFN is 0 frames.
  • the compression mode pattern sequence is started, the compression mode pattern sequence is superimposed to the third radio frame.
  • the first and third frames filled with black have GAP occupied, but there are no frames filled with gray.
  • GAP occupation conflicts there is no conflict between compressed mode 1 and compressed mode 2, but if DeltaCFN is configured as 2 frames, the compressed mode pattern sequence directly conflicts.
  • Figure 5 shows the case where the compressed mode pattern sequence conflicts when the delta CFN of compressed mode style 2 is 2 frames compared to compressed mode 1.
  • the frames occupied by GAP are filled with black, and the frames not occupied by GAP are not filled with color.
  • Frames with GAP occupation conflicts are filled with gray.
  • the first radio frame is compressed mode 1, the period is 8 frames, and the third frame filled with black has GAP occupation;
  • the second radio frame is compressed mode style 2, the period is 8 frames, and the first frame filled with black is GAP occupancy; DeltaCFN is 2 frames.
  • the compressed mode pattern sequence is started, the compressed mode pattern sequence is superimposed into a third radio frame, and there are GAP occupation conflicts in frames 1 and 3 filled with gray.
  • GAP occupation conflict in compressed mode style sequence is
  • the compression mode style sequence can be configured, when the compression mode style sequence is used to form the compression mode style sequence in the compression mode style set, if the parameters are modified during field operation, the compression mode style sequence after parameter configuration is not fully performed in the prior art. Check that there is no corresponding guarantee for the validity of the parameters, which may lead to conflicts between compression mode styles in the started compression mode style sequence. Undetectable. For example, when the measurement of a different system is started during a user's call, after the compressed mode pattern sequence is executed for a period of time, the GAP overlaps, and the compressed mode pattern sequence fails to start, causing Node B to return to the wireless link reconfiguration failure, a process interruption, and eventually a different system switch failure . Summary of the invention
  • the main object of the present invention is to provide a method for checking the validity of a compressed mode pattern sequence, which can fully check the validity of a compressed mode pattern sequence and improve the success rate of starting the compressed mode pattern sequence.
  • the present invention provides a method for checking the validity of a compressed pattern pattern sequence, which method includes the following steps:
  • the step A may include:
  • Al calculate the least common multiple of all compression mode pattern cycles in the compression mode pattern sequence, the activation time deviation of the last compression mode pattern started in the compression mode pattern sequence relative to the first compression mode pattern started, DeltaCFN, a greater than or equal to the allowable The sum of the three remaining margins of the maximum number of frames occupied by consecutive GAPs;
  • step A2 Determine the check length of the compression mode pattern sequence according to the sum of the three obtained in step A1.
  • the step A2 may be: determining the sum of the three obtained in step A1 as the check length of the compression mode pattern sequence.
  • the step A2 may also be: comparing the sum of the three obtained in step A1 with the maximum inspection length determined in advance according to the real-time requirements of the system. If the sum of the three is not greater than the maximum inspection length, take the sum of the three as the Inspection length. If the sum of the three is greater than the maximum inspection length, take the maximum inspection length as the inspection length.
  • the step B may include:
  • step Bl check whether there is a GAP occupation conflict on the compression mode style sequence within the check length, and if there is a GAP occupation conflict, the compression mode style sequence is invalid; otherwise, perform step B2;
  • the step B may also include:
  • step Bl Check the compression mode style sequence within the check length to check whether the number of consecutive GAP frames exceeds the maximum allowed consecutive GAP frame number. If the number of consecutive GAP frames exceeds the maximum allowed consecutive GAP frame number , The compression mode style sequence is invalid; otherwise, step B2 is performed;
  • the method for checking whether there is a GAP occupancy conflict may be as follows: first, each compression mode pattern in the compression mode pattern sequence is used to mark the frame occupied by GAP within the check length, and then check whether the same frame is repeatedly labeled, If the same frame is repeatedly labeled, there is a GAP occupation conflict in the compressed mode style sequence; if no frame is repeatedly labeled, there is no GAP occupation conflict in the compressed mode style sequence.
  • a one-dimensional array can be used to represent the GAP occupation of the compression mode style sequence, and the index of the array is the frame number.
  • the process of checking for GAP occupation conflicts can include:
  • the compression gap of the next compression mode style is separated from the first coordinate of the previous compression mode style by activating the time offset DeltaCFN coordinates, and the GAP of the next compression mode style will be Fill in the occupation marks in turn until the check length is checked;
  • a one-dimensional array is used to represent the compressed mode style sequence.
  • the index of the array is the frame number.
  • the length of the array is the check length of the compressed mode style sequence.
  • the size of the sliding window is determined to be the minimum number of frames that cannot be occupied by consecutive GAPs. The process that the number of occupied frames exceeds the maximum allowed number of consecutive GAP occupied frames includes:
  • the method for labeling the bits occupied by GAP may be: if there is GAP occupation, it is represented by 1 in the array; if there is no GAP occupation, it is represented by 0 in the array;
  • the method for checking whether the consecutively labeled bits in the array in the window exceeds the maximum allowed number of consecutive GAP frames is as follows: sum the array members in the window, such as the result of all the sums Are not greater than the maximum allowed consecutive GAP frames, the number of consecutive GAP occupied frames in the wireless frame superimposed by the compressed mode pattern sequence being checked does not exceed the allowed maximum consecutive GAP occupied frames; if the sum obtained If there is more than the maximum number of consecutive GAP occupied frames, the number of consecutive GAP occupied frames after the compression mode pattern sequence is superimposed exceeds the maximum allowed continuous GAP occupied frames.
  • the method to check whether the number of frames occupied by consecutive GAP exceeds the maximum allowed number of consecutive GAP occupied frames is:
  • the maximum number of consecutive GAP frames occupied by the 3GPP protocol can be used as the maximum number of consecutive GAP frames.
  • the compressed mode pattern sequence is checked for GAP occupation conflicts and whether the number of consecutive GAP occupied frames exceeds the allowed maximum GAP occupied frame number, which avoids starting an invalid compressed mode pattern sequence and due to
  • the process interruption caused by starting an invalid compression mode pattern sequence improves the success rate of starting the compression mode pattern sequence, and ensures the smooth execution of different system measurements or different frequency measurements.
  • the check length of the compression mode pattern sequence used in the method not only satisfies the traversal of the compression mode pattern combination, but also does not affect the real-time performance of the system due to the length of the check length, which ensures the communication quality of the system.
  • FIG. 1 is a schematic diagram of a compressed mode style frame
  • FIG. 2 is a parameter diagram of a compression mode style
  • FIG. 3 is a schematic diagram of conflicts between compressed mode styles
  • FIG. 4 is a schematic diagram of no conflict between compression mode styles with the same repetition period
  • FIG. 5 is a schematic diagram showing a conflict between DeltaCFN changes caused by compression modes with the same repetition period
  • FIG. 6 is a schematic diagram of a compression mode pattern sequence according to an embodiment of the present invention.
  • FIG. 7 is a flowchart of a compressed mode style sequence check of the embodiment shown in FIG. 6; FIG.
  • FIG. 8 is a schematic diagram of a compression pattern style sequence in a check length in the embodiment shown in FIG. 6; FIG.
  • FIG. 9 is a schematic diagram of checking continuous GAP occupancy by the sliding window technique of the embodiment shown in FIG. 6. '' Ways of Carrying Out the Invention
  • the core idea of the present invention is: by determining the check length of the compressed mode pattern sequence, and checking the presence or absence of GAP occupancy conflicts on the compressed mode pattern sequence within the check length range and whether there are consecutive GAP occupancy exceeding the allowed maximum consecutive GAP occupancy frames By checking the number, you can avoid starting an invalid compression mode style sequence and improve the success rate of starting the compression mode style sequence.
  • the two compression mode styles illustrated in this embodiment are shown in FIG. 6.
  • the frames occupied by GAP are filled with black, and the frames not occupied by GAP are not filled with color.
  • the first wireless frame is compressed mode style 1, with a period of 8 frames, and the first frame filled with black is occupied by GAP;
  • the second wireless frame is compressed mode style 2, with a period of 8 frames, and the first frame filled with black
  • the GAP is occupied in frames 2 and 8; the second pattern is started after the first pattern, and DeltaCFN1 is 3 frames.
  • the steps for checking the validity of this compression mode style sequence are shown in Figure 7, and include the following steps:
  • Step 701 Calculate the least common multiple M1 of all compression mode style cycles in the compression mode style sequence, the deltaCFN of the last started compression mode style relative to the first started compression mode style, a greater than or equal to the maximum frame allowed to be continuously occupied by GAP
  • the remainder of the number M2 is the sum of the three M.
  • the least common multiple of the two compression mode style periods is calculated to be 8 frames; DeltaCFNl of the second compression mode style relative to the first compression mode style is the last
  • the activated compression mode style is relative to the DeltaCFN of the first activated compression mode style, that is, DeltaCFN is 3 frames;
  • a margin M2 that is greater than or equal to the maximum number of frames allowed to be continuously used by GAP is a value greater than or equal to 2
  • a preferred method is to take a margin of 2; calculate the sum M of the above three as 13 frames.
  • the size of the margin can be an empirical value obtained through multiple experiments.
  • Steps 702-704 Determine whether M is greater than the maximum inspection length determined in advance according to the system real-time requirements. If M is greater than the predetermined maximum inspection length, the actual inspection length is determined as the maximum inspection length. If M is not greater than the maximum inspection length, the actual inspection is performed. Take M for length. Under specific implementation conditions, if the system's real-time requirements do not strictly limit the maximum inspection length, this step can be omitted and the calculated M can be directly determined as the actual inspection length.
  • Step 705 Use a one-dimensional array to represent the compression mode style sequence.
  • the index of the array is the frame number.
  • the length of the array is the check length.
  • the frames occupied by GAP are marked. 1 indicates that GAP is occupied, and 0 indicates that no GAP is occupied.
  • Step 706 Fill in the annotations of each compression mode style into the array one by one, and determine whether there are ⁇ being marked more than two times. If so, there is a GAP occupation conflict in the compression mode style sequence. The checked compression mode style sequence is invalid, and exit. Check; otherwise, go to step 707.
  • the method for determining whether a frame is labeled more than twice in this step may include:
  • step 3 Determine whether any array members are marked twice during the filling process. If it is, the GAP occupation conflict of the compression mode style sequence currently being checked; Otherwise, it is judged whether all compression mode styles have been filled in. If all compression mode styles have been filled in, the currently checked compression mode style sequence has no GAP occupation conflict; if there are unfilled compression mode styles, return to step 2.
  • the length of the array is 13, and the annotation of the compression mode style 1 is filled into the array as ⁇ 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0 ⁇ . ;
  • the compression mode style 2 has 3 frames of DeltaCFNl compared to the compression mode style 1.
  • the annotation of the compression mode style 2 is filled in the array, the first three digits of the array are not filled in, and the compression mode style is filled in from the fourth digit.
  • the annotation of 2 is filled with compression mode style 1 and compression mode style 2.
  • the array representing the compression mode style sequence is ⁇ 1, 0, 0, 1, 1, 0, 0, 0, 1, 0, 1, 1 ⁇ , When filling the compression mode style 2, there is no case where the array member is repeatedly assigned 1 and no frame is marked twice. Therefore, there is no GAP occupation conflict within the check length in the compression mode style sequence of the illustrated embodiment. Go to step 707.
  • the GAP occupancy of the compression mode style in this embodiment in the check length is shown in Figure 8.
  • the frame with GAP occupancy is filled with black, the frame without GAP occupancy is not filled with color, GAP occupancy conflict, or 3 consecutive frames and The above is occupied by GAP, filled with gray, DeltaCFN is three frames, the maximum number of frames allowed for continuous GAP is two frames, and the wireless frame within the check length is 13 frames.
  • the first wireless frame is compressed mode style 1, and GAP is occupied by frames 1 and 9 marked with black.
  • the second wireless frame is compressed mode style 2, with frames 1, 2, and 8 marked with black.
  • Frames, frames 9 and 10 have GAP occupied;
  • the third wireless frame is compression mode style 1 and compression mode style 2 to check the result of the length superposition.
  • the 9th frame is occupied by GAP.
  • the 11th, 12th, and 13th frames marked with gray are consecutive 3 frames occupied by GAP, but there is no GAP occupation overlap and no GAP occupation conflict.
  • Step 707 Determine whether the number of frames continuously occupied by the GAP exceeds 2 frames.
  • the array representing the compressed mode pattern sequence in step 705 may still be used, and a sliding window technique may be used to check whether the compressed mode pattern has more frames continuously occupied by GAP than 2 frames.
  • the sliding window is set to the minimum number of frames that is not allowed to be continuously occupied by GAP 3, and the sliding window starts from the 0 coordinate of the array representing the compression mode style sequence. Add the three array member values in the window to get the first A member value, then move the window backward by one, and then add the array member values in the window to get the second member value of array Y, and so on. If you add the array member values in a sliding window, It is found that the result obtained by the addition is equal to 3.
  • the inspected compressed mode pattern sequence is invalid and exits the inspection. If the last member of the array is added to the array member in the sliding window and the new number Y does not have a value equal to 3, the compression mode pattern sequence being checked is valid, and it exits after completing the check.
  • this embodiment shows an array of compressed mode style sequences: the first frame, the fourth frame, the fifth frame, the ninth frame, and the eleventh to thirteenth frames are 1 and the remaining bits are 0.
  • the sliding window first starts from the 0 coordinate of the array, and adds the array member values in the window to get the first member value of the new array Y, which is not equal to 3, and moves the window backward by one.
  • the compressed mode pattern of this embodiment the case where the GAP occupied frame continuously exceeds 2 frames in the check length is shown in FIG. 8.
  • the third wireless frame in FIG. 8 does not have a GAP occupied conflict, but the 11th gray frame Three consecutive frames of the frame, the 12th frame, and the 13th frame are occupied by the GAP. Therefore, the final check result in this embodiment is that the compressed mode pattern sequence is invalid.
  • the GAP occupation conflict check is performed first, and then continuous GAP occupation is performed. Check whether the number of frames exceeds the maximum allowed consecutive GAP occupied frames. In practical applications, you can also first check whether the number of consecutive GAP occupied frames exceeds the allowed maximum consecutive GAP occupied frames, and then check for GAP occupation conflicts. . However, to do this, it is necessary to create an array for labeling twice, which is more complicated than this embodiment.
  • the above-mentioned preferred embodiment determines the check length of the compression mode pattern sequence by checking the length of the compression mode pattern sequence within the length of the check and checking whether there are consecutive GAP occupied frames.
  • the number of frames occupied by the GAP exceeds the maximum allowed continuous GAP occupation.
  • the frame number check avoids initiating an invalid compression mode style sequence.
  • a maximum check length can be determined according to the specific implementation environment, and the compression is performed within the maximum check length range.
  • the pattern pattern sequence is checked to ensure the transmission quality of the system and improve the success rate of starting the compressed pattern pattern sequence.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)

Abstract

L'invention concerne un procédé permettant de vérifier la validité d'une liste de modes de compression. Le procédé permet de vérifier si l'intervalle (GAP) est en conflit et si le nombre de trames utilisées par le GAP continu dépasse le nombre de trames maximal que le GAP continu peut utiliser dans une longueur définie destinée à la liste de modes de compression utilisée pour mesurer la fréquence différente et le système différent dans un système d'accès multiple par répartition de code (CDMA), nous empêchant ainsi de commencer la liste non valide de modes de compression et d'améliorer la probabilité d'un succès du démarrage de la liste de modes de compression ; le procédé vérifiant uniquement la liste de modes de compression dans une longueur définie et répondant aux exigences en temps réel du système et garantissant ainsi la qualité de la transmission du système.
PCT/CN2005/000780 2004-06-07 2005-06-03 Procede permettant de verifier la validite d'une liste de modes de compression WO2005122449A1 (fr)

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CNB2004100455681A CN100403842C (zh) 2004-06-07 2004-06-07 一种检查压缩模式样式序列有效性的方法
CN200410045568.1 2004-06-07

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CN101123451B (zh) * 2007-04-25 2010-12-08 中兴通讯股份有限公司 一种宽带码分多址系统小区搜索压缩模式的控制方法
CN103716844B (zh) * 2012-09-28 2017-02-08 上海摩波彼克半导体有限公司 压缩模式图样重叠检测方法与装置
CN103716843B (zh) * 2012-09-28 2016-12-21 上海摩波彼克半导体有限公司 压缩模式图样重叠检测方法与装置

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CN1357984A (zh) * 2000-12-05 2002-07-10 华为技术有限公司 一种cdma系统压缩模式控制的方法
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