WO2009082899A1 - Procédé et dispositif de recherche du mode et du point de fréquence - Google Patents
Procédé et dispositif de recherche du mode et du point de fréquence Download PDFInfo
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- WO2009082899A1 WO2009082899A1 PCT/CN2008/072396 CN2008072396W WO2009082899A1 WO 2009082899 A1 WO2009082899 A1 WO 2009082899A1 CN 2008072396 W CN2008072396 W CN 2008072396W WO 2009082899 A1 WO2009082899 A1 WO 2009082899A1
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- Prior art keywords
- energy
- grid
- frequency
- subunit
- minimum bandwidth
- Prior art date
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- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000012937 correction Methods 0.000 claims description 14
- 230000008569 process Effects 0.000 claims description 6
- 238000003306 harvesting Methods 0.000 claims description 2
- 238000002372 labelling Methods 0.000 claims description 2
- 238000005259 measurement Methods 0.000 description 13
- 238000010586 diagram Methods 0.000 description 6
- 230000001360 synchronised effect Effects 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000010267 cellular communication Effects 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/20—Selecting an access point
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details 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
- H04B1/005—Details 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 adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
- H04B1/0053—Details 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 adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details 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
- H04B1/69—Spread spectrum techniques
- H04B1/707—Spread spectrum techniques using direct sequence modulation
- H04B1/7073—Synchronisation aspects
- H04B1/7075—Synchronisation aspects with code phase acquisition
- H04B1/70758—Multimode search, i.e. using multiple search strategies
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details 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
- H04B1/69—Spread spectrum techniques
- H04B1/707—Spread spectrum techniques using direct sequence modulation
- H04B1/7073—Synchronisation aspects
- H04B1/7075—Synchronisation aspects with code phase acquisition
- H04B1/7077—Multi-step acquisition, e.g. multi-dwell, coarse-fine or validation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details 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
- H04B1/69—Spread spectrum techniques
- H04B1/707—Spread spectrum techniques using direct sequence modulation
- H04B1/7073—Synchronisation aspects
- H04B1/7087—Carrier synchronisation aspects
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
- H04J11/0069—Cell search, i.e. determining cell identity [cell-ID]
- H04J11/0083—Multi-mode cell search, i.e. where several modes or systems can be used, e.g. backwards compatible, dual mode or flexible systems
Definitions
- the present invention relates to the field of communications technologies, and in particular, to a method and apparatus for searching for a system and a frequency point. Background technique
- the frequencies used in different countries, regions or wireless networks may be part of a frequency resource.
- the UE User Equipment
- the UE may not know which frequencies are currently accessible.
- a common method for this problem in the prior art is: for each possible different frequency range, such as GSM (Global System for Mobile Communications) / LTE (Long Term Evolution) , Long Term Evolution) / WCDMA (Wideband Code Division Multiple Access) for searching.
- GSM Global System for Mobile Communications
- LTE Long Term Evolution
- WCDMA Wideband Code Division Multiple Access
- This method requires repeated measurements for each frequency point, resulting in a longer measurement period.
- a 60Mhz frequency band it may include GSM/LTE/WCDMA standard.
- the measurement results of each system need to be averaged, so the entire measurement workload is relatively large.
- due to the existence of various standards it is possible to synchronize several frequency points of the highest power of each system, resulting in a relatively long time required.
- the UE may need to look at whether a certain GSM frequency point can be synchronized, and then see if a certain LTE frequency point can be synchronized, and then see if a certain WCDMA frequency point can be synchronized. Synchronization, thus causing the search process to take a long time overall.
- Embodiments of the present invention provide a search method and apparatus for a system and a frequency point to shorten the time for searching for access frequency points and standards.
- an embodiment of the present invention provides a search method for a system and a frequency point, including:
- the energy on the minimum bandwidth of the various modes is combined to be sorted; the frequency and the system with the largest amount of energy in the sorting result are accessed.
- the embodiment of the invention further provides a system for searching for a frequency and a frequency point, comprising: a grid energy acquisition unit, configured to acquire signal energy of each grid according to a frequency grid in a frequency range;
- a system energy obtaining unit configured to obtain energy of each system in a minimum bandwidth according to signal energy of each grid obtained by the grid energy acquiring unit;
- a sorting unit configured to sort the energy of the minimum bandwidths of the various modes acquired by the standard energy obtaining unit
- an access unit configured to access a frequency and a system of a specific quantity of energy in the sorting result of the sorting unit.
- the embodiment of the invention has the following advantages:
- DRAWINGS 1 is a flow chart of a method for searching for a system and a frequency point according to an embodiment of the present invention
- FIG. 2 is another flow chart of a method for searching for a system and a frequency point according to an embodiment of the present invention
- FIG. 3 is an embodiment of the present invention
- FIG. 4 is a schematic diagram of calculating a minimum bandwidth energy in an LTE system according to an embodiment of the present invention
- FIG. 5 is a schematic structural diagram of a search device for a system and a frequency point according to an embodiment of the present invention
- FIG. 6 is a schematic diagram of a system and a frequency point in an embodiment of the present invention. Another structural schematic diagram of the search device;
- Fig. 7 is a block diagram showing the structure of a grid energy correcting unit of the system and the frequency point searching device in the embodiment of the present invention. detailed description
- a search method for a standard and a frequency point is provided.
- the terminal searches for an access system that should be used for a specific frequency point on the frequency band, as shown in FIG. 1 .
- Step sl01 obtaining the signal energy of each grid according to the frequency grid in the frequency range;
- step sl02 according to the signal energy of each grid, respectively obtaining the energy of each system in the minimum bandwidth;
- Step sl03 sorting the energy on the minimum bandwidth of each system to be sorted together;
- Step sl04 accessing a specific number of frequencies and systems with the largest amount of energy in the sorting result.
- the energy on the minimum bandwidth of various standards in the frequency band is obtained and sorted, and then the access system is determined according to the sorting result, so that the access system to be used for the specific frequency point can be quickly determined, thereby In the subsequent access process, the access success rate of the terminal is effectively improved.
- Step s201 Acquire signal energy of each grid according to a frequency grid in a frequency range.
- the signal energy of each grid is measured according to a frequency grid, and the signal energy obtained by multiple measurements is added and averaged as an average of each grid. Signal energy and record.
- Step s202 Correct the signal energy of each grid.
- the specific correction method can be: According to the adjacent frequency response of the filter, find a grid with the largest signal energy over the entire continuous frequency range. First, the grid is marked as not being corrected, and then the energy of the first adjacent frequency is subtracted from the first adjacent frequency attenuation of the maximum energy, and the energy of the second adjacent frequency is subtracted from the second adjacent frequency of the maximum energy. Amount of attenuation. In general, the attenuation of the third adjacent frequency is not corrected.
- Step s203 Acquire, according to the signal energy of each grid after the correction, the energy of each system in the minimum bandwidth, and mark according to the energy amount.
- the specific sorting method can be:
- the signal energy of the grid in the minimum bandwidth window is added, and the bandwidth window is swept in units of grids, and the energy of the window is calculated in each sliding.
- the size, and ultimately the energy measurement at each minimum bandwidth of this system is obtained over the entire frequency band.
- the window energy for the energy value measurement of the adjacent window, it is only necessary to subtract the energy value of the grid of the previous sliding window, and add the energy value of the grid that slides into the window. Use this method to reduce the amount of calculation. For example as shown in FIGS.
- n window equal to the window by subtracting the energy of the energy n-1, n-1 in the first window The energy of the grid, plus the energy of the last grid in window n.
- Step s204 After all the possible methods on the frequency band are completed in step s203, the energy levels on the minimum bandwidths of the various modes in the frequency band are combined and sorted.
- the result obtained in this way may be that the frequency of the GSM signal is strong, and the signal energy of the WCDMA signal of the 200th frequency is strong.
- the hybrid ordering is performed on the measurement results of different modes of frequency overlap. For example, WCDMA has a minimum bandwidth of 4.4 Mhz, and a strong GSM frequency point and an energy LTE frequency point are found in this bandwidth. For this overlap situation, the following decision formula needs to be considered, that is, the energy of the GSM frequency point is:
- EGSM > T 1 * EWCDMA/ (fwcDMA fosivi) ( 1 ) where: 1 ⁇ is the threshold, which can be taken as 10; fwcDMA, fGSM is the minimum bandwidth of WCDMA and GSM respectively (ie measurement bandwidth); EGSM, EWCDMA are measured separately The signal energy of GSM and WCDMA obtained over the bandwidth.
- the frequency point can be considered to be the frequency of GSM, thereby eliminating the possibility that it is a WCDMA frequency point. If the inequality is not true, the frequency point can be considered to be the frequency of WCDMA, not the GSM frequency.
- Step s205 Perform n-round synchronization of the frequency points and the system with the largest n energy possible in the sorting of all the systems on a certain frequency band, and the cell detects and receives the cell broadcast.
- the energy on the minimum bandwidth of various standards in the frequency band is obtained and sorted, and then the access is performed according to the sorting result, which can effectively improve the access success rate of the terminal and reduce the successful access required. time.
- An embodiment of the present invention further provides a search device for a system and a frequency point, as shown in FIG. 5, including:
- a grid energy acquisition unit 10 configured to acquire signal energy of each grid according to a frequency grid in a frequency range
- the system energy obtaining unit 20 is configured to obtain the energy of each system in the minimum bandwidth according to the signal energy of each grid acquired by the grid energy acquiring unit 10;
- the sorting unit 30 is configured to sort the energy on the minimum bandwidth of the various modes acquired by the standard energy acquiring unit 20;
- the access unit 40 is configured to access a specific number of the most energy frequency points and systems in the sorting result of the sorting unit 30.
- the device may further include:
- the grid energy correcting unit 50 is configured to correct the signal energy of each grid acquired by the grid energy acquiring unit 10, and provide the corrected grid energy to the standard energy harvesting unit 20.
- the system energy obtaining unit 20 may include:
- Window subunit 21 used for the selected system, according to the minimum bandwidth of the system
- a sliding window subunit 22 for sliding a minimum bandwidth window of the window subunit 21 in units of a grid
- the energy recording subunit 23 is used for each sliding of the sliding window subunit 22 Taking the signal energy sum of the grid in the minimum bandwidth window, that is, obtaining the energy of the system at each minimum bandwidth over the entire frequency band;
- the energy labeling subunit 24, the energy used to record the energy recording subunit 23 at each minimum bandwidth, is labeled according to the amount of energy.
- the sorting unit 30 may include:
- a mixed sorting sub-unit 31 for sorting energy according to a minimum bandwidth of different systems at each frequency point
- the system judging subunit 32 is configured to judge the strong energy frequency point when there is a strong energy frequency point of another system in the minimum bandwidth of a certain system.
- the system determining sub-unit 32 may be a first determining unit, configured to determine whether the inequality E ⁇ E ⁇ fz/fO is established, and when determining, determining that the strong energy frequency belongs to the first standard, otherwise Determining that the strong energy frequency belongs to the second system; wherein f is the minimum bandwidth of the first possible system, the possible first system signal energy, and f 2 is the smallest possible second mode Bandwidth, E 2 is the signal energy of the second possible system, and T is a preset threshold.
- the access unit 40 may include:
- a synchronization subunit 41 for synchronizing a specific number of frequency points and a system with the largest energy, the cell detecting and receiving the cell broadcast;
- the determining subunit 42 is configured to: when the cell synchronized by the synchronization subunit 41 receives the broadcast and the camping is successful, it is determined that the synchronization is successful and the search ends; otherwise, the synchronization subunit is notified to enter the next possible frequency band search;
- the receiving subunit 43 is configured to receive the system and the frequency point information through the cell broadcast when the determining subunit 42 determines that the synchronization is successful.
- the grid energy correction unit 50 may include:
- the grid acquisition subunit 51 is configured to obtain a grid with the largest signal energy in the frequency range.
- the flag sub-unit 52 is configured to use the raster flag obtained by the raster acquisition sub-unit 51 as no correction.
- a correction sub-unit 53 for subtracting the first adjacent-frequency attenuation of the maximum energy from the energy of the first adjacent frequency of the grid with the largest energy obtained by the grid acquisition sub-unit 51, using the grid
- the energy of the second adjacent frequency of the grid with the largest energy obtained by the subunit 51 is subtracted from the second adjacent frequency attenuation of the maximum energy.
- the loop subunit 54 is configured to, after the correction subunit 53 completes the correction of the grid with the largest energy, the control flag subunit 52 obtains the grid with the largest signal energy except the grid marked as not to be corrected, and repeats the above energy. Correct the process until all the grids are marked as not being corrected.
- the energy on the minimum bandwidth of various standards in the frequency band is obtained and sorted, and then the access is performed according to the sorting result, which can effectively improve the access success rate of the terminal and reduce the successful access required. time.
- the present invention can be implemented by hardware or by software plus a necessary general hardware platform.
- the technical solution of the present invention may be embodied in the form of a software product, which may be stored in a non-volatile storage medium (which may be a CD-ROM, a USB flash drive, a mobile hard disk, etc.), including several The instructions are for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform the methods described in various embodiments of the present invention.
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Description
一种制式和频点的搜索方法以及装置 技术领域
本发明涉及通信技术领域,尤其涉及一种制式和频点的搜索方法 以及装置。 背景技术
随着无线通信技术迅速发展,越来越多的频谱资源将被分配给无 线通信或者蜂窝通信。 在不同的国家, 地区或无线网络中所使用的频 率可能是频语资源中的一部分。 当 UE ( User Equipment, 用户终端) 开机的时候, UE可能并不知道当前可以接入的频率有哪些。 同时, 在同一段频率范围内, 有可能同时存在多种接入制式的多个频点。 因 此对于 UE而言, 开机时并不知道应该在这个频段上的哪个频点上使 用哪种制式接入。
现有技术中对于该问题一种常用的方法为:在每个可用的频率范 围内, 对每个可能的不同制式如 GSM ( Global System for Mobile Communications, 全球移动通信系统 ) /LTE ( Long Term Evolution, 长期演进) /WCDMA ( Wideband Code Division Multiple Access, 宽带 码分多址)进行搜索。
在实现本发明的过程中, 发明人发现现有技术至少存在以下问 题:
该方法需要对每个频点重复进行多次测量, 导致测量周期比较 长。 例如对于一个 60Mhz的频段, 可能包括 GSM/LTE/WCDMA制 式, 对 GSM测量一次需要测量 60/0.2=300个频点, 对于 LTE需要测 量 60/1.25=48个频点, 对于 WCDMA需要测量 60/5=12个频点。 而 且每种制式的测量结果都需要平均, 因此整个测量工作量比较大。 而 且由于多种制式的存在,可能对于每种制式的最高功率的几个频点都 需要同步, 导致所需时间比较长。 例如对于一个 WCDMA的频点, UE可能需要先看某个 GSM的频点上是否能够同步, 然后再看某个 LTE的频点是否能够同步, 然后再看某个 WCDMA的频点是否能够
同步, 因此导致搜索过程总体花费的时间较长。 发明内容
本发明实施例提供一种制式和频点的搜索方法以及装置,以缩短 搜索接入频点和制式的时间。
为达到上述目的, 本发明实施例提供一种制式和频点的搜索方 法, 包括:
在频率范围内按照频率栅格获取各栅格的信号能量;
根据所述各栅格的信号能量,分别获取每一种制式在最小带宽上 的能量;
将所述各种制式最小带宽上的能量综合在一起进行排序; 对于所述排序结果中特定数量的能量最大的频点和制式进行接 入。
本发明实施例还提供一种制式和频点的搜索装置, 包括: 栅格能量获取单元,用于在频率范围内按照频率栅格获取各栅格 的信号能量;
制式能量获取单元,用于根据所述栅格能量获取单元获取的各栅 格的信号能量, 分别获取每一种制式在最小带宽上的能量;
排序单元,用于将所述制式能量获取单元获取的各种制式最小带 宽上的能量综合在一起进行排序;
接入单元,用于对于所述排序单元的排序结果中特定数量的能量 最大的频点和制式进行接入。
与现有技术相比, 本发明实施例具有以下优点:
通过使用本发明实施例,获取频段上各种制式的最小带宽上的能 量并排序, 进而根据排序结果进行接入, 可以减少搜索接入频点和制 式的时间, 并有效提高终端的接入成功率。 附图说明
图 1是本发明实施例中制式和频点的搜索方法的一种流程图; 图 2是本发明实施例中制式和频点的搜索方法的另一种流程图; 图 3是本发明实施例中计算 WCDMA制式下最小带宽能量的示 意图;
图 4是本发明实施例中计算 LTE制式下最小带宽能量的示意图; 图 5是本发明实施例中制式和频点的搜索装置的结构示意图; 图 6 是本发明实施例中制式和频点的搜索装置的另一结构示意 图;
图 7 是本发明实施例中制式和频点搜索装置的栅格能量修正单 元的结构示意图。 具体实施方式
本发明实施例中提供一种制式和频点的搜索方法,用于频段内存 在多个制式的情况下,终端对频段上特定频点应使用的接入制式的搜 索, 如图 1所示, 包括:
步骤 sl01、 在频率范围内按照频率栅格获取各栅格的信号能量; 步骤 sl02、根据各栅格的信号能量,分别获取每一种制式在最小 带宽上的能量;
步骤 sl03、 将各种制式最小带宽上的能量综合在一起进行排序; 步骤 sl04、对于排序结果中特定数量的能量最大的频点和制式进 行接入。
通过使用本发明实施例提供的方法,获取频段上各种制式的最小 带宽上的能量并排序, 进而根据排序结果确定接入制式, 可以快速确 定对于特定频点所应使用的接入制式,从而在之后的接入过程中有效 提高终端的接入成功率。
以下结合一具体的应用场景,对本发明的实施方式作进一步详细 描述。 其中, 接入所涉及的制式包括 GSM、 WCDMA和 LTE。 该实 施例中的制式和频点的搜索方法如图 2所示:
步骤 s201、 在频率范围内按照频率栅格获取每个栅格的信号能 量。
具体的, 在整个连续的频率范围内, 按照频率栅格(grid )测量 以每个栅格为带宽的信号能量,将多次测量所得的信号能量相加取平 均值, 作为每个栅格的信号能量并记录。
步骤 s202、 对各栅格的信号能量进行修正。
具体的修正方法可以为: 根据滤波器的邻带频率响应, 在整个连 续的频率范围内, 找到信号能量最大的一个栅格。 首先将此栅格标志 为不用修正,然后将其第一邻频的能量减去该最大能量的第一邻频衰 减量, 将其第二邻频的能量减去该最大能量的第二邻频衰减量。 一般 而言, 第三邻频的衰减量不用修正。
之后在除去已标记为不用修正的栅格中再找出能量最大的一个 栅格, 并重复上述步骤, 对上述步骤进行循环直到所有的栅格都被标 志为不用修正。
步骤 s203、根据修正后各栅格的信号能量,分别获取每一种制式 在最小带宽上的能量, 并按照所述能量大小进行标记。
具体的排序方法可以为:
对于选定的制式, 按照该制式的最小带宽开窗, 将最小带宽窗中 的栅格的信号能量相加, 并且以栅格为单位滑动该带宽窗, 在每次滑 动中, 计算该窗口能量的大小, 最终在整个频带上得到这种制式的每 个最小带宽上的能量测量值。 在窗口能量的计算过程中, 对于相邻窗 口的能量值测量, 只需减去前一个滑出窗口的栅格的能量值, 并加上 后一个滑入窗口的栅格的能量值即可, 使用该方法可以降低计算量。 例如如图 2和图 3中所示, 在 WCDMA或 LTE制式下, 在计算窗口 n和窗口 n-1时, 窗口 n的能量等于窗口 n-1的能量减去上窗口 n-1 中第一个栅格的能量, 再加上窗口 n中最后一个栅格的能量。
在整个连续的频率范围内,在找到的能量最大的一个最小带宽上 开窗, 并且将这个开窗标志为已经找到, 且将能量排序值置为 1或对 开窗内的能量值进行标记,然后将这个开窗左右一半的最小带宽上的
能量测量值置 0。 之后进行循环迭代, 找出除已标记的最小带宽开窗 和能量测量值置 0的窗口外的能量最大的栅格, 并重复上述步骤, 给 出能量排序,直到所有的最小带宽开窗都被标志上能量排序值或者置
0。
步骤 s204、 对该频段上所有可能的制式完成步骤 s203后, 将频 段内各种制式最小带宽上的能量大小综合在一起进行排序。
这样得到的结果可能是 1号频点 GSM信号能量强, 200号频点 WCDMA的信号能量强。 在某个频段上, 可以找出 n个最强信号和 制式(n的数量可以根据需要进行设置), 如果碰到频率重叠的问题, 这里可以进行不同制式的混合排序。混合排序是对频率重叠的不同制 式的测量结果进行的, 比如 WCDMA最小带宽 4.4Mhz, 在这个带宽 内找到了一个能量强的 GSM频点, 和一个能量强的 LTE频点。 对这 种重叠的情况需要考虑下面的判定公式, 即 GSM频点的能量为:
EGSM>T 1 * EWCDMA/ (fwcDMA fosivi) ( 1 ) 其中: 1\为门限, 可以取为 10; fwcDMA , fGSM分别为 WCDMA 和 GSM的最小带宽 (即测量带宽); EGSM, EWCDMA分别为在测量带 宽上得到的 GSM和 WCDMA的信号能量。
如果该不等式成立, 可以认为这个频点是 GSM的频点, 从而排 除其是 WCDMA频点的可能性。 如果该不等式不成立, 可以认为该 频点是 WCDMA的频点, 而非 GSM频点。
同理对于 LTE的信号和 GSM重叠也可以进行类似处理,判断下 列不等式是否成立:
EGSM>T2 *ELTE (fLTE fosivi) ( 2 ) 而对于 LTE的信号和 WCDMA重叠可以进行类似处理, 判断下 列不等式是否成立:
ELTE>T3 *EWCDMA/ (fwcDMA ^ΤΕ) ( 3 ) 上述不等式(1 ) ~ ( 3 ) 中, Tl , T2, Τ3 , 取不同的门限。 在具 体实施时所使用的不等式以及参数不限于上述不等式和参数。 另外, 在重叠情况下, 都是判断带宽小的测量信号是否真实。
步骤 s205、对某个频段上所有制式上排序中找到可能 n个能量最 大的频点和制式进行 n轮的同步, 小区检测和接收小区广播。
如果小区广播接收到, 并且驻留成功, 则通过小区广播接收其他 制式和频点信息, 退出搜索, 否则, 进入下一个可能的频段搜索。 直 到搜索到一个可用的制式或者频段为止, 否则, 搜索完所有的制式和 频点。
通过使用本发明实施例提供的方法,获取频段上各种制式的最小 带宽上的能量并排序, 进而根据排序结果进行接入, 可以有效提高终 端的接入成功率, 并减少成功接入所需的时间。
本发明的实施例还提供一种制式和频点的搜索装置, 如图 5 所 示, 包括:
栅格能量获取单元 10 , 用于在频率范围内按照频率栅格获取各 栅格的信号能量;
制式能量获取单元 20 , 用于根据栅格能量获取单元 10获取的各 栅格的信号能量, 分别获取每一种制式在最小带宽上的能量;
排序单元 30 , 用于将制式能量获取单元 20获取的各种制式最小 带宽上的能量综合在一起进行排序;
接入单元 40 , 用于对于排序单元 30的排序结果中特定数量的能 量最大的频点和制式进行接入。
如图 6所示, 该装置还可以包括:
栅格能量修正单元 50 , 用于对栅格能量获取单元 10获取的各栅 格的信号能量进行修正 ,并将修正后的栅格能量提供给制式能量获取 单元 20。
具体地, 该制式能量获取单元 20可以包括:
开窗子单元 21 , 用于对于选定的制式, 按照制式的最小带宽开 \
滑动窗子单元 22 , 用于以栅格为单位滑动开窗子单元 21的最小 带宽窗;
能量记录子单元 23 , 用于在滑动窗子单元 22的每次滑动中, 获
取最小带宽窗中栅格的信号能量和,即在整个频段上得到制式在每个 最小带宽上的能量;
能量标记子单元 24 , 用于对能量记录子单元 23记录的制式在每 个最小带宽上的能量, 按照能量大小进行标记。
具体地, 该排序单元 30可以包括:
混合排序子单元 31 , 用于按照各频点上不同制式的最小带宽上 的能量进行排序;
制式判断子单元 32 , 用于在某制式的最小带宽上存在其他制式 的强能量频点时, 判断强能量频点的制式。 具体的, 所述制式判断子 单元 32可以为第一判断单元, 用于判断不等式 E^ E^fz/fO是否成 立, 成立时则判断所述强能量频点属于所述第一种制式, 否则判断所 述强能量频点属于所述第二种制式;其中 f 为可能的第一种制式的最 小带宽, 为可能的第一种制式的信号能量, f2为可能的第二种制式 的最小带宽, E2为可能的第二种制式的信号能量, T为预先设定的门 限值。
具体地, 该接入单元 40可以包括:
同步子单元 41 , 对于特定数量个能量最大的频点和制式中的每 一个进行同步, 小区检测和接收小区广播;
判断子单元 42, 用于当同步子单元 41进行同步的小区接收到广 播且驻留成功时, 判断为同步成功且搜索结束; 否则通知同步子单元 进入下一个可能的频段搜索;
接收子单元 43 , 用于当判断子单元 42判断为同步成功时, 通过 小区广播接收制式和频点信息。
如图 7所示, 该栅格能量修正单元 50可以包括:
栅格获取子单元 51 , 用于获取频率范围内信号能量最大的栅格。 标志子单元 52, 用于将栅格获取子单元 51获取的栅格标志为不 用修正。
修正子单元 53 , 用于使用栅格获取子单元 51获取的能量最大的 栅格的第一邻频的能量减去最大能量的第一邻频衰减量,使用栅格获
取子单元 51获取的能量最大的栅格的第二邻频的能量减去该最大能 量的第二邻频衰减量。
循环子单元 54, 用于当修正子单元 53对能量最大的栅格的修正 完成后, 控制标志子单元 52获取除标志为不用修正的栅格之外的信 号能量最大的栅格, 重复上述能量修正过程, 直至所有的栅格都标志 为不用修正。
通过使用本发明实施例提供的方法,获取频段上各种制式的最小 带宽上的能量并排序, 进而根据排序结果进行接入, 可以有效提高终 端的接入成功率, 并减少成功接入所需的时间。
通过以上的实施方式的描述,本领域的技术人员可以清楚地了解 到本发明, 可以通过硬件实现, 也可以借助软件加必要的通用硬件平 台的方式来实现。基于这样的理解, 本发明的技术方案可以以软件产 品的形式体现出来, 该软件产品可以存储在一个非易失性存储介质 (可以是 CD-ROM, U盘, 移动硬盘等) 中, 包括若干指令用以使 得一台计算机设备(可以是个人计算机, 服务器, 或者网络设备等) 执行本发明各个实施例所述的方法。
总之, 以上所述仅为本发明的较佳实施例而已, 并非用于限定本 发明的保护范围。 凡在本发明的精神和原则之内所作的任何修改、 等 同替换、 改进等, 均应包含在本发明的保护范围之内。
Claims
1、 一种制式和频点的搜索方法, 其特征在于, 包括:
在频率范围内按照频率栅格获取各栅格的信号能量;
根据所述各栅格的信号能量,分别获取每一种制式在最小带宽上 的能量;
将所述各种制式最小带宽上的能量综合在一起进行排序; 对于所述排序结果中特定数量的能量最大的频点和制式进行接 入。
2、 如权利要求 1所述制式和频点的搜索方法, 其特征在于, 所 述在频率范围内按照频率栅格获取各栅格的信号能量后, 还包括: 对所述获取的各栅格的信号能量进行修正。
3、 如权利要求 2所述制式和频点的搜索方法, 其特征在于, 所 述对所述获取的各栅格的信号能量进行修正包括:
获取频率范围内信号能量最大的栅格,并将所述栅格标志为不用 修正;
使用所述能量最大的栅格的第一邻频的能量减去所述最大能量 的第一邻频衰减量,使用所述能量最大的栅格的第二邻频的能量减去 该最大能量的第二邻频衰减量;
获取除所述标志为不用修正的栅格之外的信号能量最大的栅格, 重复上述能量修正过程, 直至所有的栅格都标志为不用修正。
4、 如权利要求 1所述制式和频点的搜索方法, 其特征在于, 所 述分别获取每一种制式在最小带宽上的能量包括:
对于选定的制式, 按照所述制式的最小带宽开窗;
以栅格为单位滑动所述最小带宽窗, 在每次滑动中, 获取所述最 小带宽窗中栅格的信号能量和,作为所述制式在每个最小带宽上的能 量;
对所述制式在每个最小带宽上的能量, 按照能量大小进行标记。
5、 如权利要求 1所述制式和频点的搜索方法, 其特征在于, 所
述将各种制式最小带宽上的能量综合在一起进行排序包括: 按照各频点上不同制式的最小带宽上的能量进行排序; 在某制式的最小带宽上存在其他制式的强能量频点时,判断所述 强能量频点所属的制式。
6、 如权利要求 5所述制式和频点的搜索方法, 其特征在于, 所 述判断所述强能量频点所属的制式包括:
对于可能的第一种制式, 最小带宽为 f , 信号能量为 E1 ;
对于可能的第二种制式, 最小带宽为 f2, 信号能量为 E2;
则判断不等式 E^ E^fz/fO是否成立, 其中 T为预先设定的门 限值;
成立时则判断所述强能量频点属于所述第一种制式,否则判断所 述强能量频点属于所述第二种制式。
7、 如权利要求 1所述制式和频点的搜索方法, 其特征在于, 所 述对于所述排序结果中特定数量的能量最大的频点和制式进行接入 包括:
对于所述特定数量个能量最大的频点和制式中的每一个进行同 步, 小区检测和接收小区广播;
如果小区广播接收到且驻留成功,则通过小区广播接收制式和频 点信息, 搜索结束; 否则进入下一个可能的频段搜索, 直到搜索到一 个可用的制式和频点。
8、 一种制式和频点的搜索装置, 其特征在于, 包括
栅格能量获取单元,用于在频率范围内按照频率栅格获取各栅格 的信号能量;
制式能量获取单元,用于根据所述栅格能量获取单元获取的各栅 格的信号能量, 分别获取每一种制式在最小带宽上的能量;
排序单元,用于将所述制式能量获取单元获取的各种制式最小带 宽上的能量综合在一起进行排序;
接入单元,用于对于所述排序单元的排序结果中特定数量的能量 最大的频点和制式进行接入。
9、 如权利要求 8所述制式和频点的搜索装置, 其特征在于, 还 包括:
栅格能量修正单元,用于对所述栅格能量获取单元获取的各栅格 的信号能量进行修正,并将修正后的栅格能量提供给所述制式能量获 取单元。
10、 如权利要求 9所述制式和频点的搜索装置, 其特征在于, 所 述栅格能量修正单元包括:
栅格获取子单元, 用于获取频率范围内信号能量最大的栅格; 标志子单元,用于将所述栅格获取子单元获取的栅格标志为不用 修正;
修正子单元,用于使用所述能量最大的栅格的第一邻频的能量减 去所述最大能量的第一邻频衰减量,使用所述能量最大的栅格的第二 邻频的能量减去该最大能量的第二邻频衰减量;
循环子单元,用于当所述修正子单元对能量最大的栅格的修正完 成后,控制所述标志子单元获取除所述标志为不用修正的栅格之外的 信号能量最大的栅格, 重复上述能量修正过程, 直至所有的栅格都标 志为不用修正。
11、 如权利要求 8所述制式和频点的搜索装置, 其特征在于, 所 述制式能量获取单元包括:
开窗子单元, 用于对于选定的制式, 按照所述制式的最小带宽开 \
滑动窗子单元,用于以栅格为单位滑动所述开窗子单元的最小带 宽窗;
能量记录子单元, 用于在所述滑动窗子单元的每次滑动中, 获取 所述最小带宽窗中栅格的信号能量和,即在整个频段上得到所述制式 在每个最小带宽上的能量;
能量标记子单元,用于对所述能量记录子单元记录的制式在每个 最小带宽上的能量, 按照能量大小进行标记。
12、 如权利要求 8所述制式和频点的搜索装置, 其特征在于, 所
述排序单元包括:
混合排序子单元 ,用于按照各频点上不同制式的最小带宽上的能 量进行排序;
制式判断子单元,用于在某制式的最小带宽上存在其他制式的强 能量频点时, 判断所述强能量频点所述的制式。
13、 如权利要求 12所述制式和频点的搜索装置, 其特征在于, 所述制式判断子单元为第一判断单元,用于判断不等式 E^T^E^fz/fO 是否成立, 成立时则判断所述强能量频点属于所述第一种制式, 否则 判断所述强能量频点属于所述第二种制式;其中 f 为可能的第一种制 式的最小带宽, 为可能的第一种制式的信号能量, f2为可能的第二 种制式的最小带宽, E2为可能的第二种制式的信号能量, T为预先设 定的门限值。
14、 如权利要求 8所述制式和频点的搜索装置, 其特征在于, 所 述接入单元包括:
同步子单元,对于所述特定数量个能量最大的频点和制式中的每 一个进行同步, 小区检测和接收小区广播;
判断子单元,用于当所述同步子单元进行同步的小区接收到广播 且驻留成功时, 判断为同步成功且搜索结束; 否则通知所述同步子单 元进入下一个可能的频段搜索;
接收子单元, 用于当所述判断子单元判断为同步成功时, 通过小 区广播接收制式和频点信息。
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US8886208B2 (en) * | 2012-03-19 | 2014-11-11 | Qualcomm Incorporated | Method and apparatus of simultaneously monitoring GSM channels |
WO2014000143A1 (en) | 2012-06-25 | 2014-01-03 | Microsoft Corporation | Input method editor application platform |
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Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1333983A (zh) * | 1998-11-24 | 2002-01-30 | 艾利森公司 | 蜂窝式无线电话对蜂窝信道的加速扫描 |
CN1468021A (zh) * | 2002-05-29 | 2004-01-14 | 日本电气株式会社 | 高速全波段小区搜索蜂窝电话 |
CN1640157A (zh) * | 2002-07-24 | 2005-07-13 | 摩托罗拉公司 | 在cdma通信系统中获取载波频率的方法和装置 |
JP2007129322A (ja) * | 2005-11-01 | 2007-05-24 | Sharp Corp | 無線通信方法及び無線通信システム |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2768586B1 (fr) * | 1997-09-12 | 1999-12-03 | Nortel Matra Cellular | Estimation previsionnelle du rapport signal a interferences dans un reseau cellulaire de radiocommunications |
AU2004202550A1 (en) * | 2003-06-18 | 2005-01-13 | Nec Australia Pty Ltd | Cell search process for wireless communication system |
GB2409610B (en) * | 2003-12-23 | 2005-11-23 | Nec Technologies | Cellular network acquisition method and apparatus |
US20080181097A1 (en) * | 2006-11-16 | 2008-07-31 | Interdigital Technology Corporation | Method and ofdm receiver with multi-dimensional window processing unit for robustly decoding rf signals |
US7945004B2 (en) * | 2007-12-14 | 2011-05-17 | Motorola Mobility, Inc. | Method and apparatus for detecting a frequency band and mode of operation |
US8243775B2 (en) * | 2008-12-18 | 2012-08-14 | Qualcomm Incorporated | ID-cell index search algorithm and carrier frequency offset estimation |
-
2008
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Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1333983A (zh) * | 1998-11-24 | 2002-01-30 | 艾利森公司 | 蜂窝式无线电话对蜂窝信道的加速扫描 |
CN1468021A (zh) * | 2002-05-29 | 2004-01-14 | 日本电气株式会社 | 高速全波段小区搜索蜂窝电话 |
CN1640157A (zh) * | 2002-07-24 | 2005-07-13 | 摩托罗拉公司 | 在cdma通信系统中获取载波频率的方法和装置 |
JP2007129322A (ja) * | 2005-11-01 | 2007-05-24 | Sharp Corp | 無線通信方法及び無線通信システム |
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---|
See also references of EP2237635A4 * |
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CN101472321A (zh) | 2009-07-01 |
US8467787B2 (en) | 2013-06-18 |
EP2237635B1 (en) | 2014-01-22 |
EP2237635A1 (en) | 2010-10-06 |
US20100222056A1 (en) | 2010-09-02 |
EP2237635A4 (en) | 2011-05-11 |
CN101472321B (zh) | 2010-11-10 |
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