WO2014127657A1 - 增强wcdma系统前导检测处理能力的方法和装置 - Google Patents

增强wcdma系统前导检测处理能力的方法和装置 Download PDF

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Publication number
WO2014127657A1
WO2014127657A1 PCT/CN2013/088032 CN2013088032W WO2014127657A1 WO 2014127657 A1 WO2014127657 A1 WO 2014127657A1 CN 2013088032 W CN2013088032 W CN 2013088032W WO 2014127657 A1 WO2014127657 A1 WO 2014127657A1
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detection
preamble detection
preamble
task
time
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PCT/CN2013/088032
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English (en)
French (fr)
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王华勇
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中兴通讯股份有限公司
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Publication of WO2014127657A1 publication Critical patent/WO2014127657A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B1/00Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69Spread spectrum techniques
    • H04B1/707Spread spectrum techniques using direct sequence modulation
    • H04B1/7073Synchronisation aspects
    • H04B1/7075Synchronisation aspects with code phase acquisition

Definitions

  • the present invention relates to the field of mobile communications, and more particularly to a method and apparatus for enhancing the preamble detection processing capability of a WCDMA system.
  • the access slot is pre-defined by the base station NodeB, and the user equipment (User Equipment, UE for short) can be used to send the access preamble or The time period of the incoming message.
  • the access time slot information is sent to the UE receiving the message in a system broadcast manner, and then the UE accesses the WCDMA system through a Physical Random Access Channel (PRACH) in the access slot.
  • PRACH Physical Random Access Channel
  • the UE Before accessing the WCDMA system cell, the UE first randomly selects an available access slot and a random signature, and sends a preamble to the base station by using the initial transmit power through the PRACH; the base station detects the preamble to determine whether the UE requests access. If the base station does not detect that the UE requests access, the acquisition indicator (AI) is not sent to the UE, and the UE will increase the preamble transmit power by the step indicated by the base station, and at the next allocated access time.
  • AI acquisition indicator
  • the preamble is retransmitted in the slot until the AI is received from the base station, or the number of preamble transmissions reaches the maximum allowed number, or the transmission power exceeds the maximum allowed power; if the base station detects that there is a UE requesting access, it captures the indication channel ( AICH, Acquisition Indicator Channel) sends an acquisition indication, notifies the UE to send a random access message, and the preamble detection process is completed.
  • FIG. 1 is a schematic diagram of the timing relationship between AICH and PRACH in the WCDMA system.
  • the time of the PRACH access slot is selected based on the downlink physical channel AICH. According to the physical layer parameters of the upper layer configuration, the time offset between the PRACH access slot and the corresponding AICH access slot has the following two options. Choose:
  • ⁇ ⁇ — a 12800 chips (2.5 access slots)
  • the delay of the fiber pull must be less than 108 chips (chip) in the case of maximum hardware task support, that is, support for fiber extensions of less than 20km.
  • the fiber may need to support more than 20km. If it exceeds 20km, the time interval specified by the protocol cannot be met, resulting in the failure of this access.
  • Task 0/task 1/task 2 is invalid, resulting in invalid use of shared resources and wasting valuable hardware and software shared resources.
  • the related technical solutions can generally be processed by the following three schemes: 1) After the software and hardware processing finds that the time interval specified by the protocol cannot be met, the NodeB directly discards In this preamble, the UE cannot receive the AICH response and retransmits the preamble (Preamble) at the specified time. 2) The NodeB does not judge the time interval. As long as the preamble is correctly received, the AICH response is sent, and the UE is at the corresponding time interval. The AICH cannot be received, that is, the preamble is retransmitted at a specified time; 3) the length of the search window is reduced, so that the task can meet the time interval specified by the protocol in the process of hardware and software implementation.
  • both the scheme 1) and the scheme 2) cause the UE to fail to access the UE in the current cell, which not only increases the access delay of other UEs in the cell, but also reduces the access success rate of the UE.
  • Invalid preamble or AICH resulting in a decrease in the effective utilization rate of the NodeB software and hardware shared resources and an increase in power consumption;
  • scheme 3) reducing the cell search radius, causing some UEs at the cell boundary to fail to access the network.
  • the base station is partially extended due to the delay in the fiber extension or other cases.
  • the present invention provides a method for enhancing the preamble detection processing capability of a WCDMA system, which is used to solve the problem that some UEs cannot access due to an increase in delay in a fiber-optic remote or other situation in the prior art.
  • the present invention provides a method for enhancing a preamble detection processing capability of a WCDMA system, including: acquiring a corresponding preamble detection instruction according to a preamble sent by a UE in a WCDMA system; and according to the obtained preamble detection instruction, It is judged whether the detection task corresponding to the preamble detection instruction can be completed within a predetermined time; if it is determined that the detection task cannot be completed within a predetermined time, the startup time of the detection task is advanced.
  • the method further includes: predicting whether the performance of the preamble detection can meet the requirement of the corresponding UE after the start time of the detection task is advanced; if the prediction result is that the performance of the preamble detection cannot be satisfied.
  • the corresponding UE needs to reduce the constraint of detecting the 4096 chip length in the detection task.
  • determining whether the detection task corresponding to the preamble detection instruction can be completed within a predetermined time according to the obtained preamble detection instruction comprises: corresponding to the preamble detection instruction according to historical information of the preamble detection and current hardware resource usage The execution status of the detection task is predicted; based on the predicted result, it is determined whether the detection task corresponding to the preamble detection instruction can be completed within a predetermined time.
  • the method includes: determining whether the SNR is within a predetermined range after advancing the startup time of the detection task; After the start time is advanced, if the SNR is within a predetermined range, it is determined that the performance of the preamble detection can meet the requirements of the corresponding UE. Otherwise, it is determined that the performance of the preamble detection cannot meet the requirements of the corresponding UE.
  • the method comprises: adjusting the scrambling code sequence according to the amount of time to advance the detection task start time, so that the antenna data of the preamble detection is consistent with the scrambling code sequence.
  • the method code sequence is adjusted accordingly to achieve that the antenna data of the preamble detection is consistent with the scrambling code sequence.
  • the present invention provides an apparatus for enhancing a preamble detection processing capability of a WCDMA system, including: an obtaining unit, configured to: obtain a corresponding preamble detection instruction according to a preamble sent by a UE in a WCDMA system; and the determining unit is configured to: Determining, according to the obtained preamble detection instruction, whether the detection task corresponding to the preamble detection instruction can be completed within a predetermined time; the time adjustment unit is configured to: when the detection task cannot be completed within a predetermined time, the task is detected Kai Move ahead of time.
  • the apparatus further includes: a prediction unit, configured to: before the start time of the detection task is advanced, predict whether the performance of the preamble detection can meet the requirement of the corresponding UE after the start time of the detection task is advanced;
  • the constraint is set to: when the prediction unit predicts that the performance of the preamble detection cannot meet the requirement of the corresponding UE, the constraint of detecting the 4096 chip length in the detection task is reduced.
  • the determining unit includes: a first prediction module, configured to: predict, according to the historical information of the preamble detection and the current hardware resource usage, the execution status of the detection task corresponding to the preamble detection instruction; the first determining module is set to According to the prediction result of the first prediction module, it is determined whether the detection task corresponding to the preamble detection instruction can be completed within a predetermined time.
  • a first prediction module configured to: predict, according to the historical information of the preamble detection and the current hardware resource usage, the execution status of the detection task corresponding to the preamble detection instruction; the first determining module is set to According to the prediction result of the first prediction module, it is determined whether the detection task corresponding to the preamble detection instruction can be completed within a predetermined time.
  • the predicting unit comprises: a second determining module, configured to: determine whether the SNR is within a predetermined range after the starting time of the detecting task is advanced, and determine that the performance of the preamble detection can satisfy the corresponding if the SNR is within a predetermined range
  • the UE needs, otherwise, it is determined that the performance of the preamble detection cannot meet the requirements of the corresponding UE.
  • the embodiment of the present invention determines the detection task corresponding to the preamble detection instruction.
  • the task startup time of the detection task is advanced to provide the system delay. More time is reserved to ensure that the inspection task can meet the time information specified in the protocol, which does not require additional hardware resources.
  • Figure 1 is a schematic diagram of the timing relationship between AICH and PRACH in WCDMA system
  • Figure 2 is the timing relationship between PRACH access preamble and AICH in practical application
  • Figure 3 is a timing relationship diagram of task operation under maximum task support
  • 4 is a preferred flowchart of a method for enhancing a preamble detection processing capability of a WCDMA system in an embodiment of the present invention
  • FIG. 5 is a schematic diagram of a preferred implementation of a method for enhancing a preamble detection processing capability of a WCDMA system according to an embodiment of the present invention
  • FIG. 6 is a diagram showing a relationship between original antenna data and new antenna data and a scrambling code sequence in a method for enhancing a preamble detection processing capability of a WCDMA system according to an embodiment of the present invention
  • FIG. 7 is a schematic diagram showing a variable length of a preamble integral in a method for enhancing a preamble detection processing capability of a WCDMA system according to an embodiment of the present invention
  • FIG. 8 is a block diagram showing a preferred structure of an apparatus for enhancing a preamble detection processing capability of a WCDMA system according to an embodiment of the present invention
  • FIG. 9 is another preferred flow chart of a method for enhancing the preamble detection processing capability of a WCDMA system in an embodiment of the present invention.
  • Figure 10 is a structural diagram of a raw scrambling code sequence generator
  • Figure 11 is a structural diagram of a new scrambling code sequence generator for inversely deriving the X/Y initial value in the embodiment of the present invention.
  • the present invention provides a method and apparatus for enhancing the preamble detection processing capability of a WCDMA system, in order to solve the problem that a base station cannot access due to an increase in delay of the base station in the case of the optical fiber being extended or otherwise.
  • the invention will be described in detail in conjunction with the embodiments. Need to say
  • a preferred embodiment of the present invention provides a method for enhancing the preamble detection processing capability of a WCDMA system. As shown in FIG. 4, the method includes the following steps:
  • S404 Determine, according to the obtained preamble detection instruction, a detection task corresponding to the preamble detection instruction, Whether it can be completed within a predetermined time; specifically, in the communication field agreement, the time parameters of the preamble detection are related, for example, _ a ⁇ 7680 chips, etc., in the specific operation process, the protocol can be The time parameter specified in the determination is made as a predetermined time.
  • the execution status of the detection task corresponding to the preamble detection instruction may be predicted according to the historical information of the preamble detection and the usage information of the current hardware resource; and according to the prediction result, determining whether the detection task corresponding to the preamble detection instruction can be scheduled The time (the time specified in the agreement) is completed.
  • the startup time of the detection task is advanced. Specifically, when it is determined that the detection task cannot meet the time parameter specified in the protocol, the startup time of the detection task may be advanced. By advancing the start-up time, more time can be reserved for the transmit delay and receive delay in the WCDMA system, so that the fiber can be extended to provide sufficient margin.
  • FIG. 5 shows an implementation schematic diagram of the foregoing solution.
  • the WCDMA preamble detection calculates the ADP (Amplitude Delay Profile) of the configured task
  • all tasks are generally used to save hardware resources.
  • Serial processing For special applications where the PRACH and AICH time intervals specified by the protocol are not met, if the processing end time of the first task can be advanced, the transmission delay Tx_delay and the reception delay Rx-delay can be reserved. More time, that is, it can support farther fiber far-reaching.
  • the current conventional WCDMA preamble detection hardware design scheme if the method of increasing the working clock frequency or increasing the hardware resources is used, the problem of over-design may be caused, the design complexity is increased, and the hardware resources are wasted.
  • the above solution is to advance the task start time of calculating ADP, and the corresponding end time will also be advanced. In this way, it is only necessary to modify the corresponding configuration parameters in the software layer through simple judgment, without adding additional hardware resources, which is beneficial to the reduction of complexity and the optimization of cost performance.
  • the advancement amount of the startup time is equivalent to the margin for the delay, and the amount of the advancement can be adjusted according to the actual application, thereby achieving a more flexible configuration. ⁇ With this scheme, if the advancement time of the task startup time is K chips, it is equivalent to introducing a K chips time noise in the front end of the antenna data for correlation calculation, where the true signal correlation
  • the antenna data is (4096-K) chips.
  • the detection task corresponding to the preamble detection instruction is determined, and when it is determined that the detection task cannot meet the time information specified in the protocol, the task activation time of the detection task is advanced. Provide more reservation time for system delay, and ensure that the detection task can meet the time information specified in the protocol, which does not require additional hardware resources.
  • the invention effectively solves the problem that the base station cannot access due to the delay increase in the optical fiber remote or other cases in the related art, and enhances the capability of the preamble detection processing of the WCDMA system.
  • the method comprises: adjusting the scrambling code sequence according to the amount of time to advance the detection task start time, so that the antenna data of the preamble detection is consistent with the scrambling code sequence.
  • the scrambling code sequence for preamble detection and the scrambling code sequence for antenna data scrambling will be different.
  • the scrambling sequence of the original preamble detection and the antenna data scrambling sequence are identical, but if the scrambling code is still used before the preamble detection start time, the descrambling cannot be performed correctly.
  • the scrambling code under the start-up time advance scheme must also be adjusted to align with the actual antenna data. Therefore, the initial value of the scrambling code X/Y needs to be recursive.
  • K be the advance of the preamble detection start time, that is, the antenna data of the front K chips is noise, so it is only necessary to ensure that the length of the K chips is (4096-K) chips and the antenna data scrambling sequence is before (4096). -K) The chipping length of the chip is the same, so that the descrambling can be performed correctly.
  • the foregoing method is further optimized. Specifically, before the startup time of the detection task is advanced, the method further includes: predicting, after the startup time of the detection task is advanced, the preamble detection Whether the performance can meet the requirements of the corresponding UE. Preferably, after determining whether the start time of the detection task is advanced, whether the SNR (Signal to Noise Ratio) is within a predetermined range, and if the SNR is within a predetermined range, Determining the performance of the preamble detection can meet the requirements of the corresponding UE.
  • SNR Signal to Noise Ratio
  • the detection task will be The constraint of detecting 4096 chip length is reduced.
  • the scrambling code sequence is adjusted correspondingly after completing 4096 chip lengths, so that the antenna data of the preamble detection is consistent with the scrambling code sequence.
  • the preamble detection belongs to the coarse search, only a variety of parameters of the preamble transmission preamble need to be roughly estimated, and the accuracy requirement is not high. Therefore, the constraint of detecting the 4096 chip length specified by the protocol can be appropriately reduced (that is, the length of the preamble integral is variable), and the corresponding detection threshold is used to complete the preamble detection, thereby reducing the time overhead of the preamble detection and enhancing the equivalent hardware and software.
  • the preferred embodiment of the present invention further provides an apparatus for enhancing the preamble detection processing capability of the WCDMA system. Specifically, as shown in FIG. Includes:
  • the obtaining unit 802 is configured to obtain a corresponding preamble detection instruction according to a preamble sent by the UE in the WCDMA system.
  • the determining unit 804 is configured to determine, according to the obtained preamble detection instruction, whether the detection task corresponding to the preamble detection instruction can be completed within a predetermined time; specifically, in the protocol of the communication domain, the time parameter of the preamble detection is performed.
  • Related regulations for example, require _ a ⁇ 7680 chips, etc., during a specific operation, the time parameter specified in the protocol can be determined as a predetermined time.
  • the execution status of the detection task corresponding to the preamble detection instruction may be predicted according to the historical information of the preamble detection and the current hardware resource usage; and according to the prediction result, determining whether the detection task corresponding to the preamble detection instruction can be scheduled The time (the time specified in the agreement) is completed.
  • the time adjustment unit 806 is configured to advance the startup time of the detection task when the detection task cannot be completed within a predetermined time. Specifically, when it is determined that the detection task cannot meet the time parameter specified in the protocol, the startup time of the detection task may be advanced. By advancing the startup time,
  • the transmission delay and the reception delay are reserved for more time, which in turn allows the fiber to be extended to provide sufficient margin.
  • the detection task corresponding to the preamble detection instruction is determined, and when it is determined that the detection task cannot meet the time information specified in the protocol, the task activation time of the detection task is advanced. Provide more reservation time for system delay, and ensure that the detection task can meet the time information specified in the protocol, which does not require additional hardware resources.
  • the invention effectively solves the problem that the base station cannot access due to the delay increase in the optical fiber remote or other cases in the related art, and enhances the capability of the preamble detection processing of the WCDMA system.
  • the apparatus further includes: a prediction unit, configured to predict whether the performance of the preamble detection can meet the requirement of the corresponding UE after the start time of the detection task is advanced before advancing the startup time of the detection task;
  • a prediction unit configured to predict whether the performance of the preamble detection can meet the requirement of the corresponding UE after the start time of the detection task is advanced before advancing the startup time of the detection task;
  • the prediction unit predicts that the performance of the preamble detection cannot satisfy the requirement of the corresponding UE, the constraint of detecting the 4096 chip length in the detection task is reduced.
  • the determining unit includes: a first prediction module, configured to predict, according to the historical information of the preamble detection and the current hardware resource usage, the execution status of the detection task corresponding to the preamble detection instruction; the first determining module, configured to The result predicted by the first prediction module determines whether the detection task corresponding to the preamble detection instruction can be completed within a predetermined time.
  • a first prediction module configured to predict, according to the historical information of the preamble detection and the current hardware resource usage, the execution status of the detection task corresponding to the preamble detection instruction
  • the first determining module configured to The result predicted by the first prediction module determines whether the detection task corresponding to the preamble detection instruction can be completed within a predetermined time.
  • the prediction unit comprises: a second determining module, configured to determine whether the SNR is within a predetermined range after the start time of the detection task is advanced, and if the SNR is within a predetermined range, determining that the performance of the preamble detection can satisfy the corresponding The UE needs, otherwise, it is determined that the performance of the preamble detection cannot meet the requirements of the corresponding UE.
  • a second determining module configured to determine whether the SNR is within a predetermined range after the start time of the detection task is advanced, and if the SNR is within a predetermined range, determining that the performance of the preamble detection can satisfy the corresponding The UE needs, otherwise, it is determined that the performance of the preamble detection cannot meet the requirements of the corresponding UE.
  • the apparatus further includes: a scrambling code sequence adjusting unit, configured to: after advancing the starting time of the detecting task, adjust the scrambling code sequence according to the amount of time that the starting time of the detecting task is advanced, to implement the preamble
  • the detected antenna data is consistent with the scrambling code sequence, and after the constraint of detecting the 4096-chip length in the detection task is reduced, the scrambling code sequence is reduced according to the reduction of the constraint of detecting the length of 4096 chips in the detection task. Corresponding adjustments are made, and the antenna data of the preamble detection is consistent with the scrambling code sequence.
  • the preferred embodiment provides a specific method for enhancing the preamble detection processing capability of the WCDMA system, and FIG. 9 shows a preferred flowchart of the foregoing method. As shown in FIG. 9, the method includes the following steps:
  • Step S901 The service layer sends the preamble detection signaling according to the application, and mainly includes an initial value of the X scrambling code, an access slot, and parameter information related to the cell and the frequency point.
  • Step S902 after receiving the preamble detection signaling, the software layer decomposes the signaling into multiple subtasks that the hardware can process separately according to the processing granularity of the hardware; and simultaneously combines the task history information maintained by the software layer (mainly including the startup time of the task). The stop time and the situation in which each task in each access slot occupies hardware resources), thereby judging the usage of the hardware shared resources, and predicting the execution of each subtask of the signaling decomposition.
  • Step S903 determining a processing manner of each subtask according to the predicted execution status of each subtask. If the hardware sharing resources are sufficient, the sub-tasks can be processed in this time period, and the time interval violations specified by the protocol will not occur.
  • the S910 is processed according to the normal situation, that is, the parameters are delivered to the hardware according to the parameters sent by the service layer. If the hardware sharing resource is insufficient and the time interval requirement specified by the protocol cannot be met, then the process goes to step S904 to perform exception processing.
  • Step S904 judging whether the performance of the preamble detection can meet the application requirement if the startup time advancement scheme is used. Because after all, using this scheme, a noise is introduced, but when the SNR (Signal to Noise Ratio) is within the acceptable range, its impact on performance is negligible. If the time advancement scheme cannot satisfy the performance indicator, the process goes to step S905; otherwise, the range of the time advancement amount is determined according to the specified signal to noise ratio, and the process goes to step S906.
  • SNR Signal to Noise Ratio
  • Step S905 judging whether the performance of the preamble detection can meet the application requirement if the integral length variable scheme is used. If the integral length variable scheme cannot meet the performance index, the process goes to step S901 to notify the service layer that the preamble detection signaling configured this time cannot be completed, please reconfigure; otherwise, determine the integration length according to the specified signal to noise ratio. The variable range, and jumps to step S907.
  • Step S906 according to the time advance range determined in step S904, synthesizing the current software and hardware running conditions and various delay estimates, and selecting an optimal value as the final timing advance.
  • Step S907 according to the variable integral length range determined in step S905, synthesizing current hardware and software running conditions and various delay estimates, and selecting an optimal value as the final integral length.
  • Step S908 according to the parameter values determined in step S906 or step 907, modify the startup time of the task and the time point of loading the antenna data, and other related time parameters, to ensure the consistency of the task execution and the antenna data, and adjust the corresponding The leading detection threshold.
  • Step S909 according to the initial value of the original scrambling code provided by the service layer, combined with the various parameter values determined in step S906 or step 907 and step 908, the initial value of the scrambling code X/Y is recursed to ensure the antenna data of the preamble detection. Align with the scrambling code sequence.
  • the 4th initial value X/Y inverse is determined by the following recursive process: 3GPP agreement, before it ⁇
  • the generator structure of the new 4 sigma sequence is shown in Figure 11.
  • the lowest bit of the 25 bit state value of x/y is padded to the bit by the calculated one state value after the shift. Taking the start time 768 chips as an example, it needs to iterate 768 times, and obtain the state value of the x/y sequence before 768 chips as the initial state value (X, y) generated by the new scrambling code. This set of values is the new parameter. To generate a scrambling code for preamble detection.
  • the corresponding need to modify the corresponding scrambling code is to increase the one-step inverse push process, that is, if the 768 chips is advanced, the x/y sequence state of the previous 768chips is inversely derived according to the initial state of the antenna data scrambling code x/y sequence, as the preamble detection scrambling code.
  • the generated input parameters are used to obtain the scrambling code required for the preamble detection.
  • Step S910 the preamble detection task and related parameters are sent, and the related information of the current delivery task is maintained to the task history information table.
  • Step S91 After the hardware layer receives the preamble detection task sent by the software layer, the task is advanced. Line validity detection, timing detection, and scheduling processing according to task running timing information assigned by the software layer.
  • Step S912 Initialize the hardware by using the antenna data loading time point and the recursive X/Y initial value sent by the software layer, and start the hardware operation according to the startup time of the task.
  • Step S913 The hardware reads the antenna data from the antenna data loading time point, generates a scrambling code sequence by using the X/Y value of the software configuration, and sends the shared hardware coherent accumulation resource to calculate the ADP value of the corresponding integration length.
  • Step S914 the software layer performs further processing after receiving the ADP value reported by the hardware, and then reports the final preamble detection result to the service layer.
  • the embodiments of the present invention effectively solve the problem that the base station cannot access due to the delay increase due to the delay in the optical fiber in the related art, and enhance the preamble detection processing capability of the WCDMA system.

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Abstract

一种增强宽带码分多址WCDMA系统前导检测处理能力的方法和装置,其中,该方法包括:根据WCDMA系统中用户设备 UE发送的前导,获取对应的前导检测指令;根据获取到的前导检测指令,判断前导检测指令对应的检测任务,是否能够在预定的时间内完成;若判定检测任务不能够在预定的时间内完成,则将检测任务的启动时间提前。本发明实施例有效地解决了相关技术中基站在光纤拉远或其它情况下由于延迟增大导致部分UE无法接入的问题,增强了WCDMA系统前导检测处理能力。

Description

增强 WCDMA系统前导检测处理能力的方法和装置
技术领域
本发明涉及移动通讯领域,特别是涉及一种增强 WCDMA系统前导检测 处理能力的方法和装置。
背景技术
在宽带码分多址 (Wideband-Code Division Multiple Access , 简称 WCDMA) 系统中, 接入时隙是基站 NodeB 预先定义好的、 用户设备 (User Equipment, 简称 UE)可以用来发送接入前导或者接入消息的时间段。接入时 隙信息以系统广播的方式发送给接收到此消息的 UE, 然后 UE在接入时隙 通过物理随机接入信道 (Physical Random Access Channel , 简称 PRACH)接 入 WCDMA 系统。
UE在接入 WCDMA 系统小区之前, 首先随机选择一个可用接入时隙 和随机签名, 通过 PRACH 向基站以初始发射功率发送前导 (Preamble); 基 站对前导进行检测, 以判断是否有 UE 请求接入; 如果基站没有检测到有 UE请求接入,则不会将捕获指示 (Acquisition Indicator,简称 AI)发送给 UE, UE将以基站指示的步长增加前导发射功率, 并在下一个分配的接入时隙中 重新发送前导, 直到接收到来自基站的 AI , 或前导发送次数达到了允许的 最大次数, 或发射功率超过了最大允许功率; 如果基站检测到有 UE请求接 入, 则通过捕获指示信道 (AICH, Acquisition Indicator Channel)发送捕获指 示, 通知 UE发送随机接入消息, 前导检测过程完成, 图 1为上述 WCDMA 系统中 AICH和 PRACH的时序关系的示意图。
由于 WCDMA属于严格的同步系统, PRACH接入时隙的时间是以下行 物理信道 AICH 为基准进行选择的。 根据上层配置的物理层参数不同, PRACH接入时隙与相应的 AICH接入时隙之间的时间偏移量有如下两种选 择:
1 ) 当 "AICH的发送时序模式 Transmission Timing == 0" 时:
τρ_ρ > 15360 chips (3个接入时隙)
τρa = 7680 chips(1.5个接入时隙)
τρm = 15360 chips(3个接入时隙)
2 ) 当 "AICH发送时序模式 Transmission Timing ==1" 时:
τρ_ρ > 20480 chips (4个接入时隙)
τρa = 12800 chips(2.5个接入时隙)
τρm = 20480 chips(4个接入时隙)
由上而知, 当 "AICH Transmission Timing = 0" 时, PRACH与 AICH之 间的时序要求最为严格。 在 NodeB 中实现的前导检测过程, 必须满足 Tp_a≤ 7680 chips的条件。 但由于各种物理或实现因素的原因导致各种延迟, 如空中传播延迟、 传输线传播延迟、 软硬件处理延迟等, 致使在满足此条件 的情况下需要付出的代价非常大。 具体如图 2所示, 空中延迟和软件处理延 迟相对比较固定, 假如需要光纤拉远到一定的距离, 则必须提高硬件的处理 速度和能力, 以便相应的降低硬件处理延迟, 给光纤拉远留足充裕的时间余 量。
如图 3的例子所示, 在硬件最大任务支持情况下光纤拉远的延迟必须小 于 108 chips (码片) , 即支持不到 20km的光纤拉远。 但实际应用中, 光纤 拉远可能需要支持超过 20km。 假如超过 20km, 则无法满足协议规定的时间 间隔, 导致本次接入失败, 任务 0/任务 1/任务 2无效, 导致共享资源无效占 用, 浪费宝贵的软硬件共享资源。
相关技术方案一般釆用提高工作频率、 增加软硬件并行度、 提高处理能 力等技术, 在设计中留有足够的余量来处理各种小区 UE的接入问题。 为满 足极少数情况下出现的恶劣情况, 相关技术不惜花费大量的代价, 重用大量 硬件资源, 或对软硬资源进行深度优化, 这不仅增加设计的复杂度, 而且浪 费资源, 增加 NodeB的成本代价。
如果余量设计不足或根本没有考虑光纤拉远的情况, 相关技术方案一般 可釆用如下三种方案进行处理: 1 ) NodeB 在软硬件处理之后发现无法满足 协议规定的时间间隔, 则直接丟弃本次前导, UE无法接收到 AICH回应, 在规定时间重新发送前导 (Preamble); 2 ) NodeB 并不进行时间间隔的判断, 只要正确接收到前导后即发送 AICH回应, UE在相应的时间间隔如果无法 接收到 AICH, 即在规定时间重新发送前导 (Preamble); 3 )减少搜索窗长度, 使本次任务在软硬件实现的过程中能满足协议规定的时间间隔。 上述提供的 三种方案中, 方案 1 )和方案 2 )均会导致本次小区 UE接入失败, 不仅增加 小区其它 UE的接入时延, 降低小区 UE的接入成功率, 同时由于需要处理 无效的前导或 AICH, 导致 NodeB软硬件共享资源有效使用率的降低和功耗 的增加; 方案 3 )减少了小区搜索半径, 导致小区边界的某些 UE无法接入 网络。
针对相关技术中基站在光纤拉远或其它情况下由于延迟增大导致部分
UE无法接入的问题, 目前尚未提出有效地解决方案。
发明内容
本发明提供了一种增强 WCDMA系统前导检测处理能力的方法,用以解 决现有技术中基站在光纤拉远或其它情况下由于延迟增大导致部分 UE无法 接入的问题。
为解决上述技术问题,一方面,本发明提供一种增强 WCDMA系统前导 检测处理能力的方法, 包括: 根据 WCDMA系统中 UE发送的前导, 获取对 应的前导检测指令; 根据获取到的前导检测指令, 判断前导检测指令对应的 检测任务, 是否能够在预定的时间内完成; 若判定检测任务不能够在预定的 时间内完成, 则将检测任务的启动时间提前。 优选地, 在将检测任务的启动时间提前之前, 方法还包括: 预测将检测 任务的启动时间提前后, 前导检测的性能是否能够满足对应的 UE的需求; 若预测结果为前导检测的性能不能满足对应的 UE的需求, 则将检测任务中 检测 4096码片长度的约束进行缩减。
优选地, 根据获取到的前导检测指令, 判断前导检测指令对应的检测任 务, 是否能够在预定的时间内完成, 包括: 根据前导检测的历史信息、 当前 硬件资源的使用情况,对前导检测指令对应的检测任务的执行情况进行预测; 根据预测的结果, 判断前导检测指令对应的检测任务, 是否能够在预定的时 间内完成。
优选地, 预测将检测任务的启动时间提前后, 前导检测的性能是否能够 满足对应的 UE的需求, 包括: 判断将检测任务的启动时间提前后, SNR是 否在预定的范围内;若将检测任务的启动时间提前后, SNR在预定的范围内, 则判定前导检测的性能能够满足对应的 UE的需求, 否则, 判定前导检测的 性能不能够满足对应的 UE的需求。
优选地, 在将检测任务的启动时间提前之后, 方法包括: 根据将检测任 务的启动时间提前的时间量, 将扰码序列进行相应的调整, 以实现前导检测 的天线数据与扰码序列一致。
优选地,在将检测任务中检测 4096码片长度的约束进行缩减之后,方法 码序列进行相应的调整, 以实现前导检测的天线数据与扰码序列一致。
另一方面,本发明还提供一种增强 WCDMA系统前导检测处理能力的装 置, 包括: 获取单元, 设置为: 根据 WCDMA系统中 UE发送的前导, 获取 对应的前导检测指令; 判断单元, 设置为: 根据获取到的前导检测指令, 判 断前导检测指令对应的检测任务, 是否能够在预定的时间内完成; 时间调整 单元, 设置为: 在检测任务不能够在预定的时间内完成, 则将检测任务的启 动时间提前。
优选地, 该装置还包括: 预测单元, 设置为: 在将检测任务的启动时间 提前之前, 预测将检测任务的启动时间提前后, 前导检测的性能是否能够满 足对应的 UE的需求; 缩减单元, 设置为: 在预测单元预测结果为前导检测 的性能不能满足对应的 UE的需求时,则将检测任务中检测 4096码片长度的 约束进行缩减。
优选地, 判断单元包括: 第一预测模块, 设置为: 根据前导检测的历史 信息、 当前硬件资源的使用情况, 对前导检测指令对应的检测任务的执行情 况进行预测; 第一判断模块, 设置为: 根据第一预测模块预测的结果, 判断 前导检测指令对应的检测任务, 是否能够在预定的时间内完成。
优选地, 预测单元包括: 第二判断模块, 设置为: 判断将检测任务的启 动时间提前后, SNR是否在预定的范围内, 若 SNR在预定的范围内, 则判 定前导检测的性能能够满足对应的 UE的需求, 否则, 判定前导检测的性能 不能够满足对应的 UE的需求。
本发明实施例的有益效果如下:
本发明实施例在进行前导检测的过程中, 对前导检测指令对应的检测任 务进行判断, 在判定检测任务不能满足协议中规定的时间信息时, 将检测任 务的任务启动时间提前, 为系统延迟提供更多的预留时间, 保证检测任务可 以满足协议中规定的时间信息, 这种方式无需额外的增加硬件资源。 本发明 实施例有效地解决了相关技术中基站在光纤拉远或其它情况下由于延迟增大 导致部分 UE无法接入的问题, 增强了 WCDMA系统前导检测处理能力。
附图概述
图 1 是 WCDMA系统中 AICH和 PRACH的时序关系的示意图; 图 2 是 PRACH的接入前导与 AICH在实际应用中的时序关系; 图 3 是件最大任务支持情况下任务运行的一种时序关系图; 图 4 是本发明实施例中增强 WCDMA系统前导检测处理能力的方法的 一种优选的流程图;
图 5 是本发明实施例中增强 WCDMA系统前导检测处理能力的方法的 一种优选的实现原理图;
图 6 是本发明实施例增强 WCDMA系统前导检测处理能力的方法中原 始天线数据和新天线数据与扰码序列的关系比对图;
图 7 是本发明实施例增强 WCDMA系统前导检测处理能力的方法中前 导积分长度可变的示意图;
图 8 是本发明实施例中增强 WCDMA系统前导检测处理能力的装置的 一种优选的结构框图;
图 9 是本发明实施例中增强 WCDMA系统前导检测处理能力的方法的 另一种优选的流程图;
图 10是原始扰码序列产生器的结构图;
图 11是本发明实施例中 X/Y初始值逆推的新扰码序列产生器结构图。
本发明的较佳实施方式
为了解决基站在光纤拉远或其它情况下由于延迟增大导致部分 UE无法 接入的问题,本发明实施例提供了一种增强 WCDMA系统前导检测处理能力 的方法和装置, 下文中将参考附图并结合实施例来详细说明本发明。 需要说
组合。
实施例 1
本发明优选的实施例提供了一种增强 WCDMA 系统前导检测处理能力 的方法, 如图 4所示, 该方法包括如下步骤:
S402,根据 WCDMA系统中 UE发送的前导,获取对应的前导检测指令;
S404,根据获取到的前导检测指令,判断前导检测指令对应的检测任务, 是否能够在预定的时间内完成; 具体地, 在通讯领域的协议中, 对前导检测 的时间参量进行了相关的规定, 例如, 要求 _a≤ 7680 chips等, 在具体操作 过程中, 可以将协议中规定的时间参量作为预定的时间进行判断。 优选地, 可以根据前导检测的历史信息、 当前硬件资源的使用信息, 对前导检测指令 对应的检测任务的执行情况进行预测; 根据预测的结果, 判断前导检测指令 对应的检测任务, 是否能够在预定的时间 (协议中规定的时间) 内完成。
S406, 若判定检测任务不能够在预定的时间内完成, 则将检测任务的启 动时间提前。具体地,在判断检测任务不能够满足协议中规定的时间参量时, 可以将检测任务的启动时间提前。通过将启动时间提前,可以为 WCDMA系 统中发送延迟和接收延迟预留更多的时间, 从而可以光纤拉远提供充足的余 量。
图 5示出上述方案的实现原理图,具体来说, 目前 WCDMA前导检测在 计算所配置任务的 ADP ( Amplitude delay profile, 幅度延迟分布) 时, 为节 约硬件资源, 所有的任务一般都是釆用串行处理的。 对于在某些无法满足协 议规定的 PRACH和 AICH时间间隔的特殊应用场合下, 如果能把第一个任 务的处理结束时间提前, 就可以给传送延迟 Tx— delay和接收延迟 Rx— delay 预留更多的时间, 也即可以支持更远的光纤拉远。 按照目前常规的 WCDMA 前导检测硬件设计方案,假如釆用提高工作时钟频率或增加硬件资源的方式, 会引起过度设计的问题, 增加设计复杂度和浪费硬件资源。 上述方案是把计 算 ADP的任务启动时间提前, 则相应的结束时间也会提前。 这样,仅需在软 件层经过简单的判断修改相应配置参数即可, 无需增加额外的硬件资源, 有 利于实现复杂度的降低, 达到性价比的最优化。 启动时间的提前量相当于给 延迟的余量, 可以根据实际应用来调节提前量的大小, 从而达到较为灵活的 配置。 釆用这种方案, 假如任务启动时间的提前量为 K chips, 相当于在进行 相关计算的天线数据前端引入一段 K chips时间的噪声, 其中真正信号相关 的天线数据是 (4096-K)chips。 这样虽然降低了积分长度, 但是只要保证提前 量在一合理的范围, 前导检测启动时间提前的方案在允许的性能损失范围内 是可以应用的, 并不会对前导检测性能造成很大的影响。
在上述优选的实施方式中, 在进行前导检测的过程中, 对前导检测指令 对应的检测任务进行判断, 在判定检测任务不能满足协议中规定的时间信息 时, 将检测任务的任务启动时间提前, 为系统延迟提供更多的预留时间, 保 证检测任务可以满足协议中规定的时间信息, 这种方式无需额外的增加硬件 资源。 本发明有效地解决了相关技术中基站在光纤拉远或其它情况下由于延 迟增大导致部分 UE无法接入的问题,增强了 WCDMA系统前导检测处理能 力。
优选地, 在将检测任务的启动时间提前之后, 方法包括: 根据将检测任 务的启动时间提前的时间量, 将扰码序列进行相应的调整, 以实现前导检测 的天线数据与扰码序列一致。
具体来说, 如图 6所示, 在釆用启动时间提前方案的情况下, 用于前导 检测的扰码序列和天线数据加扰的扰码序列会有所不同。 原始前导检测的扰 码序列和天线数据扰码序列是完全相同的, 但是如果前导检测启动时间点提 前仍然釆用这样的扰码, 则无法正确解扰。 为了正确解扰, 启动时间提前方 案下的扰码也必须进行相应的调整, 以便跟真实的天线数据对齐。 因此, 需 要对扰码初始值 X/Y进行递推。设 K为前导检测启动时间的提前量, 即前 K chips的天线数据是噪声, 故只需要保证 K chips后长度为 (4096-K)chips的扰 码序列与天线数据扰码序列的前 (4096-K)chips长度的扰码相同即可, 这样便 可正确地解扰。
在原有前导检测设计方案中, 根据 3GPP协议, Y扰码的全部比特位和 X扰码的最高比特位均是固定到 l'bl ,仅需对 X扰码的低 24比特进行配置。 在釆用启动时间提前方案的情况下, 需要硬件支持扰码初始值 X/Y的 25bit 全部可配。 软件层在配置任务的时候根据应用场合由启动时间提前量迭代出 扰码初始值 X/Y, 并下发给硬件。
在本发明的一个优选的实施方式中, 还对上述方法进行了优化, 具体来 说, 在将检测任务的启动时间提前之前, 方法还包括: 预测将检测任务的启 动时间提前后, 前导检测的性能是否能够满足对应的 UE的需求, 优选地, 判断将检测任务的启动时间提前后, SNR ( Signal to Noise Ratio, 信噪比) 是否在预定的范围内,若 SNR在预定的范围内,则判定前导检测的性能能够 满足对应的 UE的需求, 否则, 判定前导检测的性能不能够满足对应的 UE 的需求; 若预测结果为前导检测的性能不能满足对应的 UE的需求, 则将检 测任务中检测 4096码片长度的约束进行缩减。 优选地, 在完成 4096码片长 将扰码序列进行相应的调整, 以实现前导检测的天线数据与扰码序列一致。
具体来说, 由于前导检测属于粗搜索, 仅需要对对端发送前导的各种参 数进行粗略估计, 精度的要求并不高。 因此, 可通过对协议规定的检测 4096 码片长度的约束进行适当缩减 (即前导积分长度可变) , 并配合相应的检测 门限来完成前导检测, 从而减少前导检测的时间开销, 增强同等软硬件资源 条件下的前导检测处理能力。如图 7所示,原有前导检测方案,需要处理 4096 码片的时间开销; 而釆用新的前导检测方案后, 仅需要处理 N ( N < 4096 ) 码片的时间开销。
实施例 2
基于上述实施例 1中提供的增强 WCDMA系统前导检测处理能力的方法, 本发明优选的实施例还提供了一种增强 WCDMA 系统前导检测处理能力的 装置, 具体地, 如图 8所示, 该装置包括:
获取单元 802 , 用于根据 WCDMA系统中 UE发送的前导, 获取对应的 前导检测指令; 判断单元 804, 用于根据获取到的前导检测指令, 判断前导检测指令对 应的检测任务, 是否能够在预定的时间内完成; 具体地, 在通讯领域的协议 中,对前导检测的时间参量进行了相关的规定,例如,要求 _a≤ 7680 chips等 , 在具体操作过程中,可以将协议中规定的时间参量作为预定的时间进行判断。 优选地, 可以根据前导检测的历史信息、 当前硬件资源的使用情况, 对前导 检测指令对应的检测任务的执行情况进行预测; 根据预测的结果, 判断前导 检测指令对应的检测任务, 是否能够在预定的时间 (协议中规定的时间) 内 完成。
时间调整单元 806, 用于在检测任务不能够在预定的时间内完成, 则将 检测任务的启动时间提前。 具体地, 在判断检测任务不能够满足协议中规定 的时间参量时, 可以将检测任务的启动时间提前。 通过将启动时间提前,
WCDMA系统中发送延迟和接收延迟预留更多的时间, 进而可以光纤拉远提 供充足的余量。
在上述优选的实施方式中, 在进行前导检测的过程中, 对前导检测指令 对应的检测任务进行判断, 在判定检测任务不能满足协议中规定的时间信息 时, 将检测任务的任务启动时间提前, 为系统延迟提供更多的预留时间, 保 证检测任务可以满足协议中规定的时间信息, 这种方式无需额外的增加硬件 资源。 本发明有效地解决了相关技术中基站在光纤拉远或其它情况下由于延 迟增大导致部分 UE无法接入的问题,增强了 WCDMA系统前导检测处理能 力。
优选地, 该装置还包括: 预测单元, 用于在将检测任务的启动时间提前 之前, 预测将检测任务的启动时间提前后, 前导检测的性能是否能够满足对 应的 UE的需求; 缩减单元, 用于在预测单元预测结果为前导检测的性能不 能满足对应的 UE的需求时,则将检测任务中检测 4096码片长度的约束进行 缩减。 优选地,判断单元包括:第一预测模块,用于根据前导检测的历史信息、 当前硬件资源的使用情况, 对前导检测指令对应的检测任务的执行情况进行 预测; 第一判断模块, 用于根据第一预测模块预测的结果, 判断前导检测指 令对应的检测任务, 是否能够在预定的时间内完成。
优选地, 预测单元包括: 第二判断模块, 用于判断将检测任务的启动时 间提前后, SNR是否在预定的范围内, 若 SNR在预定的范围内, 则判定前 导检测的性能能够满足对应的 UE的需求, 否则, 判定前导检测的性能不能 够满足对应的 UE的需求。
优选地, 该装置还包括: 扰码序列调整单元, 用于在将检测任务的启动 时间提前之后, 根据将检测任务的启动时间提前的时间量, 将扰码序列进行 相应的调整, 以实现前导检测的天线数据与扰码序列一致, 以及, 在将检测 任务中检测 4096码片长度的约束进行缩减之后,根据将检测任务中检测 4096 码片长度的约束进行缩减的缩减量, 将扰码序列进行相应的调整, 以前导检 测的天线数据与扰码序列一致。
实施例 3
基于上述实施例 1和实施例 2中提供的技术方案, 本优选的实施例提供 了一种增强 WCDMA系统前导检测处理能力的具体的方法,图 9示出上述方 法的一种优选的流程图, 如图 9所示, 该方法包括如下步骤:
步骤 S901 ,业务层根据应用下发前导检测信令,主要包括 X扰码初始值、 接入时隙以及小区和频点相关的参数信息。
步骤 S902 , 软件层在接收到前导检测信令之后, 根据硬件的处理粒度, 把信令分解成硬件能够单独处理的多个子任务; 同时结合软件层维护的任务 历史信息 (主要包括任务的启动时间、 停止时间以及各个接入时隙各任务占 用硬件资源的情况) , 从而判断硬件共享资源的使用情况, 并预测本次信令 分解的各子任务的执行情况。 步骤 S903 , 根据预测的本次各子任务的执行情况来决定各子任务的处理 方式。 如果硬件共享资源充分, 在此时间段内完全能进行各子任务的处理, 不会发生协议规定的时间间隔违例的情况, 则执行 S910按正常情况处理, 即按业务层下发的参数对硬件进行配置; 否则, 由于硬件共享资源匮乏, 无 法满足协议规定的时间间隔要求, 则跳转到步骤 S904进行异常处理。
步骤 S904 , 判断假如釆用启动时间提前方案, 前导检测的性能能否满足 应用需求。 因为毕竟釆用此方案, 会引入一段噪声, 但当 SNR (信噪比)在 可接受的范围之内, 其对性能的影响是可以忽略的。 如果时间提前方案不能 满足性能指标, 则跳转到步骤 S905; 否则, 则根据指定的信噪比确定时间提 前量的范围, 并跳转到步骤 S906。
步骤 S905 , 判断假如釆用积分长度可变方案, 前导检测的性能能否满足 应用需求。 如果积分长度可变方案不能满足性能指标, 则跳转到步骤 S901 , 通知业务层, 本次所配置的前导检测信令无法完成, 请重新配置; 否则, 则 根据指定的信噪比确定积分长度可变的范围, 并跳转到步骤 S907。
步骤 S906 , 根据步骤 S904确定的时间提前量范围, 综合当前软硬件运 行情况和各种延迟估算, 折中选择一最优值作为最终的时间提前量。
步骤 S907 , 根据步骤 S905确定的可变积分长度范围, 综合当前软硬件 运行情况和各种延迟估算, 折中选择一最优值作为最终的积分长度。
步骤 S908 , 根据步骤 S906或步骤 907中所确定的参数值, 修改任务的 启动时间和天线数据装载的时间点, 以及其它相关的时间参数, 以确保任务 执行与天线数据的一致性, 并调整相应的前导检测门限。
步骤 S909 , 根据业务层提供的原始扰码初始值, 并结合步骤 S906或步 骤 907以及步骤 908确定的各种参数值,对扰码初始值 X/Y进行递推,以保证 前导检测的天线数据与扰码序列对齐。
4尤码初始值 X/Y逆推由如下递推过程确定: 3GPP协议规定, 其前^
确定, 只要保证 x/y初始状态值相同就可
假如需要生成如图 6所示的新的前导检测扰码序列, 需要根据天线数据对应 4尤码序列的子序列 x/y的初始状态, 逆推出 K chips之前对应的 x/y序列的初 始状态 xl/yl ,则 xl/yl即可作为前导检测 4尤码序列对应的 x/y的新初始状态, 具体推导如下:
PRACH长扰码所釆用的原始扰码序列产生器的结构如图 10所示, 其表 达式为:
xn(i+25) =xn(i+3) + xn(i) modulo 2, i=0, ... , 225-27 y(i+25) = y(i+3)+y(i+2) +y(i+l) +y(i) modulo 2, i=0,…, 225-27 由此, 经过对以上表达式的变换, 得出新扰码子序列的表达式为: xn(i) = (xn(i+25) - xn(i+3)) modulo 2, i=0, ... , 225-27
y(i) = (y(i+25) - y(i+3) - y(i+2) - y(i+l) ) modulo 2, i=0,…, 225-27
由此, 新 4尤码序列的产生器结构如图 1 1所示, x/y的 25 bit状态值的最 低位都是在移位之后由计算得到的一位状态值填充到该 bit。以启动时间提前 768 chips为例, 需要迭代 768次, 得到 768 chips之前的 x/y序列的状态值作 为新的扰码生成的初始状态值 (X , y) , 这一组值就是新的参数来生成用于前 导检测的扰码。
因此, 对应扰码所需要修改的就是增加一步逆推过程, 即如果启动提前 768chips , 则根据天线数据扰码 x/y序列初始状态逆推出 768chips以前的 x/y 序列状态, 作为前导检测扰码生成的输入参数, 从而得到前导检测所需的扰 码。
步骤 S910 , 下发前导检测任务和相关参数, 并把本次下发任务的相关信 息维护到任务历史信息表。
步骤 S91 1 , 硬件层在接收到软件层下发的前导检测任务之后, 对任务进 行有效性检测、 时序检测, 并根据软件层分配的任务运行时序信息进行调度 处理。
步骤 S912,釆用软件层下发的天线数据装载时间点和递推的 X/Y初始值 初始化硬件, 并根据任务的启动时间启动硬件运行。
步骤 S913 , 硬件从天线数据装载时间点开始读取天线数据, 以软件配置 的 X/Y值为初始值产生扰码序列,一并送入共享的硬件相干累加资源计算相 应积分长度的 ADP值。
步骤 S914, 软件层在接收到硬件上报的 ADP值后做进一步处理, 然后 将最终的前导检测结果报告给业务层。
尽管为示例目的, 已经公开了本发明的优选实施例, 本领域的技术人员 将意识到各种改进、 增加和取代也是可能的, 因此, 本发明的范围应当不限 于上述实施例。
工业实用性
本发明实施例有效地解决了相关技术中基站在光纤拉远或其它情况下由 于延迟增大导致部分 UE无法接入的问题,增强了 WCDMA系统前导检测处 理能力。

Claims

权 利 要 求 书
1、 一种增强宽带码分多址 WCDMA系统前导检测处理能力的方法, 所 述方法包括以下步骤:
根据 WCDMA系统中用户设备 UE发送的前导,获取对应的前导检测指 令;
根据获取到的所述前导检测指令, 判断所述前导检测指令对应的检测任 务, 是否能够在预定的时间内完成;
若判定所述检测任务不能够在所述预定的时间内完成, 则将所述检测任 务的启动时间提前。
2、如权利要求 1所述的方法, 其中, 在将所述检测任务的启动时间提前 之前, 所述方法还包括:
预测将所述检测任务的启动时间提前后, 前导检测的性能是否能够满足 对应的 UE的需求;
若预测结果为前导检测的性能不能满足对应的 UE的需求, 则将所述检 测任务中检测 4096码片长度的约束进行缩减。
3、如权利要求 1或 2所述的方法, 其中, 所述根据获取到的所述前导检 测指令, 判断所述前导检测指令对应的检测任务, 是否能够在预定的时间内 完成, 包括:
根据前导检测的历史信息、 当前硬件资源的使用情况, 对所述前导检测 指令对应的检测任务的执行情况进行预测;
根据预测的结果, 判断所述前导检测指令对应的检测任务, 是否能够在 预定的时间内完成。
4、如权利要求 2所述的方法, 其中,预测将所述检测任务的启动时间提 前后, 前导检测的性能是否能够满足对应的 UE的需求, 包括:
判断将所述检测任务的启动时间提前后,信噪比 SNR是否在预定的范围 内;
若将所述检测任务的启动时间提前后, SNR在预定的范围内, 则判定前 导检测的性能能够满足对应的 UE的需求, 否则, 判定前导检测的性能不能 够满足对应的 UE的需求。
5、如权利要求 1所述的方法, 其中, 在将所述检测任务的启动时间提前 之后, 所述方法包括:
根据将所述检测任务的启动时间提前的时间量, 将扰码序列进行相应的 调整, 以实现前导检测的天线数据与扰码序列一致。
6、 如权利要求 2所述的方法, 其中, 在将所述检测任务中检测 4096码 片长度的约束进行缩减之后, 所述方法包括: 扰码序列进行相应的调整, 以实现前导检测的天线数据与扰码序列一致。
7、 一种增强宽带码分多址 WCDMA系统前导检测处理能力的装置, 包 括:
获取单元, 设置为: 根据 WCDMA系统中用户设备 UE发送的前导, 获 取对应的前导检测指令;
判断单元, 设置为: 根据获取到的所述前导检测指令, 判断所述前导检 测指令对应的检测任务, 是否能够在预定的时间内完成;
时间调整单元, 设置为: 在所述检测任务不能够在所述预定的时间内完 成, 则将所述检测任务的启动时间提前。
8、 如权利要求 7所述的装置, 其中, 还包括:
预测单元, 设置为: 在将所述检测任务的启动时间提前之前, 预测将所 述检测任务的启动时间提前后, 前导检测的性能是否能够满足对应的 UE的 需求;
缩减单元, 设置为: 在所述预测单元预测结果为前导检测的性能不能满 缩减。
9、 如权利要求 7或 8所述的装置, 其中, 所述判断单元包括: 第一预测模块, 设置为: 根据前导检测的历史信息、 当前硬件资源的使 用情况, 对所述前导检测指令对应的检测任务的执行情况进行预测;
第一判断模块, 设置为: 根据第一预测模块预测的结果, 判断所述前导 检测指令对应的检测任务, 是否能够在预定的时间内完成。
10、 如权利要求 8所述的装置, 其中, 所述预测单元包括:
第二判断模块, 设置为: 判断将所述检测任务的启动时间提前后, 信噪 比 SNR是否在预定的范围内, 若 SNR在预定的范围内, 则判定前导检测的 性能能够满足对应的 UE的需求, 否则, 判定前导检测的性能不能够满足对 应的 UE的需求。
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101136689A (zh) * 2006-12-05 2008-03-05 中兴通讯股份有限公司 一种前导检测中的天线数据存取调度方法
CN102264149A (zh) * 2010-05-26 2011-11-30 中兴通讯股份有限公司 一种宽带码分多址系统终端随机接入方法及装置
WO2012057675A1 (en) * 2010-10-29 2012-05-03 Telefonaktiebolaget L M Ericsson (Publ) Method and arrangement in a communications network

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1750441B (zh) * 2004-09-16 2010-05-05 中兴通讯股份有限公司 宽带码分多址系统接入信道前导检测方法
CN101098186B (zh) * 2006-06-27 2012-05-09 中兴通讯股份有限公司 一种确定随机接入前导检测动态门限的方法
CN100550668C (zh) * 2006-08-08 2009-10-14 华为技术有限公司 一种实现多小区接入前导检测资源复用的方法和装置
CN101217808B (zh) * 2008-01-17 2013-01-16 中兴通讯股份有限公司 无线通信系统中随机接入信号的发送方法
CN101242671B (zh) * 2008-03-13 2011-06-08 北京北方烽火科技有限公司 一种wcdma基站rach前导检测功能实现方法
WO2012106798A1 (en) * 2011-02-11 2012-08-16 Research In Motion Limited Time-advanced random access channel transmission
CN102223654B (zh) * 2011-06-21 2017-04-26 中兴通讯股份有限公司 一种前导检测方法及系统
CN102843706A (zh) * 2011-06-22 2012-12-26 中兴通讯股份有限公司 一种随机接入信道配置参数优化方法、装置及系统
CN102447532B (zh) * 2012-01-19 2014-05-28 大唐移动通信设备有限公司 一种前导码检测方法及装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101136689A (zh) * 2006-12-05 2008-03-05 中兴通讯股份有限公司 一种前导检测中的天线数据存取调度方法
CN102264149A (zh) * 2010-05-26 2011-11-30 中兴通讯股份有限公司 一种宽带码分多址系统终端随机接入方法及装置
WO2012057675A1 (en) * 2010-10-29 2012-05-03 Telefonaktiebolaget L M Ericsson (Publ) Method and arrangement in a communications network

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
TECHNICAL SPECIFICATION GROUP RADIO ACCESS NETWORK: "3GPP TS 25.214 V11.4.0: Physical layer procedures (FDD) (Release 11", 3RD GENERATION PARTNERSHIP PROJECT (3GPP, 31 December 2012 (2012-12-31), pages 45 - 49 *

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