WO2018166406A1 - Cell search method and ue - Google Patents

Abstract

The disclosure provides a cell search method and UE. The method may comprise: performing the combination and ranking of PSC correlation values N PSC_Proc times, and after each combination, selecting, from the combined PSC correlation values, the ranked top N_PSC PSC correlation values, to obtain N PSC_Proc×N_PSC PSC correlation values; selecting, from the N PSC_Proc×N_PSC PSC correlation values, N PSC correlation values, of which the number of times of occurrence exceeds a first preset number of times threshold; performing frame synchronization at the time slot positions corresponding to the N PSC correlation values, so as to select a frame start position and a scrambling code group number; and performing cell determination on the basis of the frame start position and scrambling code group number.

Description

Cell search method and UE

Cross-reference to related applications

The present application claims priority to Chinese Patent Application No. 201710145627.X filed on Jan. 13, 2017, the entire contents of

Technical field

The present disclosure relates to the field of communications technologies, and in particular, to a cell search method and a user terminal (UE, User Equipment).

Background technique

In the current Wideband Code Division Multiple Access (WCDMA) communication network, the UE synchronizes with the network side device through a three-step cell search. The first step is to implement slot synchronization by the primary synchronization channel (Primary). Synchronization Channel (P-SCH) assists in determining the slot header of the received signal; the second step implements frame synchronization, which is assisted by a Secondary Synchronization Channel (S-SCH) to determine the frame header of the received signal. The scrambling code group number of the primary scrambling code used by the cell; the third step is to implement pilot synchronization, which is assisted by a Primary Common Pilot Channel (P-CPICH) to determine the primary scrambling code number of the cell. In order to implement the cell search, the system message of the cell can be read out through the Primary Common Control Physical Channel (P-CCPCH) channel. However, in the above technique, only the Primary Synchronization Code (PSC) correlation value ranking and decision are performed once in the primary synchronization, which results in a relatively high probability of cell miss detection.

Summary of the invention

The purpose of the present disclosure is to provide a cell search method and a UE to solve the problem that the probability of cell miss detection is relatively high.

In order to achieve the above object, an embodiment of the present disclosure provides a cell search method, including: performing N _{PSC_Proc} Primary Synchronization Code (PSC) correlation value merging and sorting, and after each merge, after the merge Selecting pre-sequence N_PSC PSC correlation values in the PSC correlation values to obtain N _{PSC_Proc} × N_PSC PSC correlation values, wherein the N _{PSC_Proc} and N_PSC are both positive integers; in the N _{PSC_Proc} × N_PSC PSC correlation values Selecting N PSC correlation values whose number of occurrences exceeds a first preset number of thresholds, wherein the N is a positive integer; performing frame synchronization at a slot position corresponding to the N PSC correlation values to select a frame start position and a scrambling code group number; performing cell determination based on the frame start position and the scrambling code group number.

In some optional embodiments, performing frame synchronization on a slot position corresponding to the N PSC correlation values to select a frame start position and a scrambling code group number, including: for the N PSC correlation values In the slot position corresponding to each PSC correlation value, the N _{SSC_Proc} Secondary Synchronization Code (SSSC) correlation value is combined and sorted, and each merged is selected in the SSC correlation value after the merge. The first N_SSC SSC correlation values are obtained to obtain N×N _{SSC_Proc} × N_SSC SSC correlation values, wherein each SSC correlation value corresponds to one frame start position and one scrambling code group number, and the N _{SSC_Proc} and N_SSC are positive An integer; selecting, among the N×N _{SSC_Proc} ×N_SSC correlation values, an ISC correlation value that occurs more than a second preset number of thresholds, and selecting a frame start position and a disturbance corresponding to the I SSC correlation value The code group number, and the I is a positive integer.

In some optional embodiments, the step of performing frame synchronization on a slot position corresponding to the N PSC correlation values to select a frame start position and a scrambling code group number, further comprising: calculating the N The peak ratio of the SSC correlation value group of the slot position corresponding to each PSC correlation value of each of the PSC correlation values, wherein the SSC correlation value group of the slot position corresponding to one PSC correlation value includes the slot position for N _{SSC_Proc} times SSC The SSC correlation value obtained by combining the correlation values, wherein the peak ratio is a ratio of a maximum SSC correlation value in the SSC correlation value group to a mean value of correlation value modulus values in the SSC correlation value group; corresponding to the N PSC correlation values Selecting N_PAR slot positions among the N slot positions, wherein the peak value of the SSC correlation value group corresponding to the N_PAR slot positions is ranked before the N_PAR in the peak ratio of the N SSC correlation value groups, wherein The N_PAR is a positive integer; in the frame start position and the scrambling code group number corresponding to the I SSC correlation value, a frame start position and a scrambling code group number corresponding to the J SSC correlation values are selected, where The time slot to which the frame start position corresponding to the J SSC correlation values belongs Is set to the slot positions N_PAR slot position, the J is a positive integer.

In some optional embodiments, the step of performing frame synchronization on a slot position corresponding to the N PSC correlation values to select a frame start position and a scrambling code group number, further comprising: a frame start position and a scrambling code group number corresponding to the SSC correlation values are used as a set, and Y scrambling code group numbers are selected in the set, and each scrambling code group number in the Y scrambling code group numbers is The number of corresponding frame start positions in the set is within a third predetermined number of thresholds, and the Y is a positive integer; for each of the Y scrambling code group numbers, in the set The frame start position corresponding to the largest SSC correlation value among the SSC correlation values corresponding to the scrambling code group number is selected.

In some optional embodiments, the performing cell determination based on the frame start position and the scrambling code group number includes: using, for each symbol of a target frame start position in the selected frame start position, respectively The H scrambling codes in the scrambling code group corresponding to the corresponding scrambling code group are descrambled and despread, and obtain M correlation values corresponding to each scrambling code, where M is the number of symbols included in the starting position of the target frame. Wherein H is a number of scrambling codes included in the scrambling code group, wherein the target frame starting position is any one of the selected frame start positions; and each of the scrambling codes corresponds to M The correlation values are respectively added to obtain H related power values; the minimum correlation power value of the H related power values is multiplied by the preset power parameter value to obtain a power threshold value; and the H related power values are determined. Whether there is a related power value that is greater than the power threshold. If there is a related power value greater than the power threshold in the H related power values, it is determined that the target frame start location has a cell.

The embodiment of the present disclosure further provides a user terminal, including: a merging module, configured to perform N _{PSC_Proc} PSC correlation value merging and sorting, and select a pre-sorting N_PSC in the merged PSC correlation value after each merging. PSC correlation values to obtain N _{PSC_Proc} × N_PSC PSC correlation values, wherein the N _{PSC_Proc} and N_PSC are both positive integers; a selection module, configured to select more occurrences in the N _{PSC_Proc} × N_PSC PSC correlation values a first PSP correlation value of the first preset number of thresholds, wherein the N is a positive integer; a frame synchronization module, configured to perform frame synchronization at a slot position corresponding to the N PSC correlation values, to select a frame start a location and scrambling code group number; a determining module, configured to perform cell determination based on the frame start location and the scrambling code group number.

In some optional embodiments, the frame synchronization module includes: a first merging unit, configured to perform N _{SSC_Proc} times SSC correlation values for slot positions corresponding to each of the N PSC correlation values Combining and sorting, and selecting the pre-sorting N_SSC SSC correlation values in the SSC correlation values after the combination to obtain N×N _{SSC_Proc} × N_SSC SSC correlation values, wherein each SSC correlation value corresponds to a frame start position and a scrambling code group number, and the N _{SSC_Proc} and the N_SSC are both positive integers; the first selecting unit is configured to select the number of occurrences in the N×N _{SSC_Proc} × N_SSC SSC correlation values to exceed And selecting a frame start position and a scrambling code group number corresponding to the I SSC correlation value, where the I is a positive integer.

In some optional embodiments, the frame synchronization module further includes: a calculating unit, configured to calculate a peak of the SSC correlation value group of the slot position corresponding to each of the N PSC correlation values The SSC correlation value group of the slot position corresponding to one PSC correlation value includes the SSC correlation value obtained by combining the N _{SSC_Proc} times SSC correlation value at the slot position, and the peak ratio is the maximum SSC in the SSC correlation value group. a ratio of the correlation value to the mean value of the correlation value modulus values in the SSC correlation value group; and a second selection unit, configured to select N_PAR time slot positions among the N time slot positions corresponding to the N PSC correlation values, where And the peak value of the SSC correlation value group corresponding to the N_PAR slot positions is ranked before the N_PAR in the peak ratio of the N SSC correlation value groups, where the N_PAR is a positive integer; the third selection unit is used for And selecting, in a frame start position and a scrambling code group number corresponding to the I SSC correlation value, a frame start position and a scrambling code group number corresponding to the J SSC correlation values, where the J SSC correlation values correspond to The slot position to which the frame start position belongs is the N_PAR Position of the relief slot position, the J is a positive integer.

In some optional embodiments, the frame synchronization module further includes: a fourth selecting unit, configured to use, as a set, a frame start position and a scrambling code group number corresponding to the J SSC correlation values, and Selecting Y scrambling code group numbers in the set, and the number of corresponding scrambling code group numbers in the set of the scrambling code group numbers in the set is within a third preset number threshold And the Y is a positive integer; the fifth selecting unit is configured to select, in each of the Y scrambling code group numbers, the SSC correlation value corresponding to the scrambling code group number in the set. The starting position of the frame corresponding to the largest SSC correlation value.

In some optional embodiments, the determining module includes: a descrambling and despreading unit, configured to respectively use a corresponding scrambling code group number for each symbol of a target frame start position in the selected frame start position The H scrambling codes in the corresponding scrambling code group are descrambled and despread to obtain M correlation values corresponding to each scrambling code, where M is the number of symbols included in the starting position of the target frame, where the H a scrambling code number included in the scrambling code group, wherein the target frame start position is any one of the selected frame start positions; the accumulating unit is configured to use the M correlations corresponding to each scrambling code The values are respectively accumulated to obtain H related power values; the power calculation unit is configured to multiply the minimum correlation power value of the H related power values by a preset power parameter value to obtain a power threshold value; Determining whether there is a relevant power value greater than the power threshold value in the H related power values, and if there is a related power value in the H related power values that is greater than the power threshold value, determining the There is a cell at the start of the target frame.

The embodiment of the present disclosure further provides a user terminal, including: a processor, a transceiver, a memory, a user interface, and a bus interface, wherein: the processor is configured to read a program in the memory, and perform the following process: N _{PSC_Proc} times PSC correlation values are combined and sorted, and after each combination, the pre-sequencing N_PSC PSC correlation values are selected in the PSC correlation values of the current merge to obtain N _{PSC_Proc} × N_PSC PSC correlation values, wherein The N _{PSC_Proc} and the N_PSC are both positive integers; among the N _{PSC_Proc} × N_PSC PSC correlation values, N PSC correlation values whose occurrence times exceed the first preset number of thresholds are selected, wherein the N is a positive integer; Performing frame synchronization on the slot positions corresponding to the N PSC correlation values to select a frame start position and a scrambling code group number; performing cell determination based on the frame start position and the scrambling code group number.

In some optional embodiments, performing, by the processor, performing frame synchronization on a slot position corresponding to the N PSC correlation values to select a frame start position and a scrambling code group number, including: for the N _Select the slot position corresponding to each PSC correlation value of the PSC correlation value, perform N _{SSC_Proc} times SSC correlation value combination and sorting, and select N_SSC SSC correlations in the SSC correlation values after the combination after each combination. a value to obtain N×N _{SSC_Proc} × N_SSC SSC correlation values, where each SSC correlation value corresponds to one frame start position and one scrambling code group number, and the N _{SSC_Proc} and N_SSC are both positive integers; _{Selecting, from the} N×N _{SSC_Proc} × N_SSC correlation values, an ISC correlation value whose number of occurrences exceeds a second preset number of thresholds, and selecting a frame start position and a scrambling code group number corresponding to the I SSC correlation values, I is a positive integer.

In some optional embodiments, the processor performs frame synchronization on a slot position corresponding to the N PSC correlation values to select a frame start position and a scrambling code group number, and further includes: a calculation center a peak ratio of the SSC correlation value group of the slot position corresponding to each of the PSC correlation values, wherein the SSC correlation value group of the slot position corresponding to one PSC correlation value includes the slot position for N _{SSC_Proc} The SSC correlation value obtained by combining the sub-SSC correlation values, the peak ratio being a ratio of the maximum SSC correlation value in the SSC correlation value group to the mean value of the correlation value modulus values in the SSC correlation value group; the N PSC correlations Selecting N_PAR slot positions in the N slot positions corresponding to the value, wherein the peak value of the SSC correlation value group corresponding to the N_PAR slot positions is prior to sorting the N_PAR in the peak ratio of the N SSC correlation value groups The N_PAR is a positive integer; in the frame start position and the scrambling code group number corresponding to the I SSC correlation values, a frame start position and a scrambling code group number corresponding to the J SSC correlation values are selected, where , the frame start position corresponding to the J SSC correlation values belongs to The slot position is the slot position N_PAR slot position, the J is a positive integer.

In some optional embodiments, the processor performs frame synchronization on a slot position corresponding to the N PSC correlation values to select a frame start position and a scrambling code group number, and further includes: Determining a frame start position and a scrambling code group number corresponding to the J SSC correlation values as a set, and selecting Y scrambling code group numbers in the set, each scrambling code group in the Y scrambling code group numbers The number of corresponding frame start positions in the set is within a third predetermined number of thresholds, and the Y is a positive integer; for each of the Y scrambling code group numbers, The frame start position corresponding to the largest SSC correlation value among the SSC correlation values corresponding to the scrambling code group number is selected in the set.

In some optional embodiments, the performing, by the processor, performing cell determination based on the frame start position and the scrambling code group number, including: for each of the target frame start positions in the selected frame start position a symbol, which is descrambled and despread using H scrambling codes in the scrambling code group corresponding to the corresponding scrambling code group number, respectively, to obtain M correlation values corresponding to each scrambling code, where M is the starting position of the target frame a number of symbols included, wherein the H is a scrambling code number included in the scrambling code group, wherein the target frame start position is any one of the selected frame start positions; each scrambling code is used The corresponding M correlation values are respectively accumulated to obtain H related power values; the minimum correlation power value of the H related power values is multiplied by the preset power parameter value to obtain a power threshold value; and the H pieces are determined. Whether there is a relevant power value greater than the power threshold value in the related power value, and if there is a related power value greater than the power threshold value among the H related power values, determining that the target frame start position exists Community.

The foregoing technical solutions of the present disclosure have at least the following beneficial effects: in the embodiment of the present disclosure, performing N _{PSC_Proc} sub-PSC correlation value merging and sorting, and selecting N_PSC pre-sorting among the merged PSC correlation values after each merging PSC correlation values to obtain N _{PSC_Proc} × N_PSC PSC correlation values, wherein the N _{PSC_Proc} and N_PSC are positive integers; selecting the number of occurrences in the N _{PSC_Proc} × N_PSC PSC correlation values exceeds a first preset number of thresholds N PSC correlation values, wherein the N is a positive integer; frame synchronization is performed at a slot position corresponding to the N PSC correlation values to select a frame start position and a scrambling code group number; based on the frame The start position and the scrambling code group number are used for cell determination. Since the previous N_PSC PSC correlation values are selected for each combination, more cells can be selected, and then the _{number of} occurrences of the N _{PSC_Proc} × N_PSC PSC correlation values after the N _{PSC_Proc} merge is selected exceeds the first preset number of times. The N PSC correlation values of the threshold can reduce the probability of cell miss detection.

DRAWINGS

FIG. 1 is a schematic structural diagram of a network according to an embodiment of the present disclosure;

2 is a schematic flowchart of a cell search method according to an embodiment of the present disclosure;

FIG. 3 is a schematic diagram of an example of a primary synchronization process according to an embodiment of the present disclosure;

FIG. 4 is a schematic diagram of an example of a frame synchronization process according to an embodiment of the present disclosure;

FIG. 5 is a schematic diagram of an example of a cell determining process according to an embodiment of the present disclosure;

FIG. 6 is a schematic structural diagram of a UE according to an embodiment of the present disclosure;

FIG. 7 is a schematic structural diagram of another UE according to an embodiment of the present disclosure;

FIG. 8 is a schematic structural diagram of another UE according to an embodiment of the present disclosure;

FIG. 9 is a schematic structural diagram of another UE according to an embodiment of the present disclosure;

FIG. 10 is a schematic structural diagram of another UE according to an embodiment of the present disclosure;

FIG. 11 is a schematic structural diagram of another UE according to an embodiment of the present disclosure.

detailed description

The technical problems, the technical solutions, and the advantages of the present invention will be more clearly described in conjunction with the accompanying drawings and specific embodiments.

Referring to FIG. 1 , FIG. 1 is a schematic structural diagram of a network according to an embodiment of the present disclosure. As shown in FIG. 1 , the UE 11 and the network side device 12 are included. The UE 11 may be a mobile phone, a tablet personal computer, or a laptop (Laptop). Terminal-side devices, such as a personal digital assistant (PDA), a mobile Internet device (MID), or a wearable device, need to be described in the embodiment of the present disclosure. The specific type of UE 11 is not limited. The UE 11 can establish communication with the network side device 12, wherein the network in the figure can indicate that the UE 11 and the network side device 12 establish wireless communication, and the network side device 12 can be an evolved base station (eNB) or other base station, or It may be a network side device such as an access point device. It should be noted that the specific type of the network side device 12 is not limited in the embodiment of the present disclosure.

In addition, the embodiments of the present disclosure may be applied to a Wideband Code Division Multiple Access (WCDMA) system. Of course, the embodiments of the present disclosure are not limited. For example, the principles of the invention in the embodiments of the present disclosure may also be applied to Other communication systems. Some specific descriptions and examples in the embodiments of the present disclosure may be exemplified by a WCDMA system.

Referring to FIG. 2, an embodiment of the present disclosure provides a cell search method, as shown in FIG. 2, including the following steps:

201. Perform N _{PSC_Proc} PSC correlation value combining and sorting, and select, before each merge, the pre-sequencing N_PSC PSC correlation values in the current PSC correlation value to obtain N _{PSC_Proc} × N_PSC PSC correlation values, Wherein, N _{PSC_Proc} and N_PSC are both positive integers;

202. Select, among the N _{PSC_Proc} × N_PSC PSC correlation values, N PSC correlation values whose number of occurrences exceeds a first preset number of thresholds, where N is a positive integer;

203. Perform frame synchronization on a slot position corresponding to the N PSC correlation values to select a frame start position and a scrambling code group number.

204. Perform cell determination based on the frame start location and the scrambling code group number.

The PSC correlation value may be a correlation value obtained by performing related operations on the received data and the PSC, wherein the PSC is a known synchronization sequence in the WCDMA system, and may be the first 256 chips transmitted in each time slot. (chip), of course, the embodiment of the present disclosure does not limit this. For example, the above PSC correlation value can be obtained by a related operation represented by the following formula:

Where C(n) represents the PSC correlation value, c _p (i) represents the known sequence, ie PSC, and r(i+n) represents the received data.

The PSC correlation value combination may be performed by accumulating the PSC correlation values of the N _t slots, and combining the accumulated PSC correlation values with the last combined PSC correlation values, wherein the first merged PSC of the first merge is performed. The correlation value can be all zeros. That is, the i-th PSC correlation value combination may include accumulating the PSC correlation values of the i-th N _t time slots, and combining the accumulated PSC correlation values with the i-1-time combined PSC correlation values, where i is 1 Then, the PSC correlation values of the i-1 merges may be all zeros.

By step 201, the N_PSC PSC correlation values before the sorting of the correlation values after each combination can be obtained, that is, N _{PSC_Proc} × N_PSC PSC correlation values are obtained. The above N_PSC may be a positive integer set in advance, and may be a double number. For example, N_PSC may be equivalent to 2×N_PSC, but the values of the two N_PSCs are different. For example, when 2×N_PSC is equal to 4, N_PSC may be defined. Equal to 2, of course, in this case, it is also possible to directly define that N_PSC is equal to 4, that is, the method of not using 2×N_PSC. Of course, it can also be singular, and the embodiment of the present disclosure is not limited. In addition, the above N _{PSC_Proc} may be a positive integer set in advance. In addition, the above sorting may be sorted from large to small.

In step 202, selecting, among the N _{PSC_Proc} × N_PSC PSC correlation values, the N PSC correlation values whose occurrence times exceed the first preset number of thresholds may be, the number of repetitions in the N _{PSC_Proc} × N_PSC PSC correlation values exceeds the first N PSC correlation values of the preset number of thresholds (Thres_PSC). Because the pre-sorting N_PSC PSC correlation values are selected in each of the merged PSC correlation values obtained in step 201, such that in different merges, some identical PSC correlation values may exist. For example, the first PSC correlation value is merged before the pre-sorting N_PSC PSC correlation value is the location set [4 8 6 5 3 7], that is, the front N _t time slot outputs the position set [4 8 6 5 3 7]; The secondary PSC correlation value is merged before the pre-sorting N_PSC PSC correlation value is the location set [4 11 9 5 10 1], that is, the 2N _t time slot outputs the position set [4 11 9 5 10 1]; the third PSC The correlation value before the pre-sorting N_PSC PSC correlation value is the location set [4 2 15 16 12 7], that is, the first 3N _t time slot outputs the position set [4 2 15 16 12 7]; the first preset number of thresholds ( Thres_PSC) is 2, then the position where the number of occurrences exceeds 2 is 4 (3 occurrences).

After selecting the above N PSC correlation values, frame synchronization can be performed at the slot positions corresponding to the N PSC correlation values to select the frame start position and the scrambling code group number. Since the PSC correlation value can be obtained based on the PSC of a certain time slot and the received data, a PSC correlation value can correspond to a slot position. The frame synchronization may be performed by using the SSC correlation value for frame synchronization, which is not limited in this embodiment of the disclosure. And the above selection frame start position and scrambling code group number can be understood as determining at least one frame start position and a corresponding scrambling code group number by frame synchronization. In addition, the above frame start position can also be understood as a frame header.

The frame start position and the scrambling code group number determined by the frame synchronization may be used to perform cell determination based on the frame start position and the scrambling code group number to determine whether there is a cell in the start position of the frame, and the purpose of the cell search is achieved. .

Since the previous N_PSC PSC correlation values are selected for each combination, more cells can be selected, that is, the weaker cells can be allowed to be selected, and the probability of missed detection of the weak cells is reduced. And by _selecting N _{PSC_Proc} × N_PSC PSC correlation values after N _{PSC_Proc} merges, the N PSC correlation values whose occurrence times exceed the first preset number of thresholds are selected, so that most invalid positions can be screened out, and more effective is retained. position. In this way, the probability of reducing the missed detection of the cell, and screening out most invalid positions, and retaining more effective positions, can achieve the effect of reducing the computational complexity of subsequent frame synchronization and cell determination.

In some optional embodiments, the process of selecting the foregoing N PSC correlation values may also be as shown in FIG. 3, i is equal to 0, and the PSC correlation of the ith N _t time slot is performed, that is, the correlation operation is performed to obtain the PSC correlation value. And accumulating the correlation values; the PSC correlation values of the (i-1) N _t slots before combining (where the first is all 0s); taking the largest 2N_PSC (or N_PSC) among the i-th merged PSC correlation values The slot position corresponding to the correlation value P_PSC; whether i is equal to N_PSC_Proc-1 (where N_PSC_Proc is equal to the above N _{PSC_Proc} ), if not, then i+1, continue to perform the above steps, and if so, 2N_PSC×N_PSC_Proc positions The time slot position P_PSC of Thres_PSC times is exceeded.

In some optional embodiments, the frame synchronization is performed at a slot position corresponding to the N PSC correlation values to select a frame start position and a scrambling code group number, including:

And performing N _{SSC_Proc} times SSC correlation value merging and sorting for the slot positions corresponding to each of the N PSC correlation values, and selecting the sorting among the merged SSC correlation values after each combination N_SSC SSC correlation values to obtain N×N _{SSC_Proc} × N_SSC SSC correlation values, wherein each SSC correlation value corresponds to one frame start position and one scrambling code group number, and the N _{SSC_Proc} and N_SSC are positive integers ;

_Selecting, among the N×N _{SSC_Proc} ×N_SSC SSC correlation values, an ISC correlation value whose number of occurrences exceeds a second preset number of thresholds, and selecting a frame start position and a scrambling code group corresponding to the I SSC correlation values. Number, the I is a positive integer.

The SSC correlation value may be a correlation value obtained after the SSC performs related operations on the received data, and the SSC may be a known synchronization sequence in the WCDMA system, and may be sent in the first 256 chip of each time slot, in fact, the first 256 chip. It can be considered that it is sent (PSC+SSC), so the SSC correlation is similar to the PSC and will not be described here.

The foregoing SSC correlation value combination may also be accumulated by the SSC correlation values of the N _t time slots, and the accumulated SSC correlation value is merged with the last combined SSC correlation value, wherein the first merged PSC correlation of the previous merge Values can be all zeros. Since the _{SSC_Proc} times SSC correlation value is combined and sorted in each slot position, and each merged, the N_SSC SSC correlation values before sorting are selected in the current SSC correlation value, so that N×N can be obtained. _{SSC_Proc} × N_SSC SSC correlation values.

In this implementation manner, among the N×N _{SSC_Proc} ×N_SSC SSC correlation values, one SSC correlation value whose occurrence number exceeds a second preset number threshold (Thres_SSC) is selected, and the I SSC correlation values may also be correspondingly The frame start position and the scrambling code group number are regarded as the first set, or such a first set can be directly generated. In this way, step 204 can perform cell determination by the frame start position and the scrambling code group number in the set. Since N _{SSC_Proc} times SSC correlation values are combined and sorted for each slot position, and each time after the combination, the pre-sequencing N_SSC SSC correlation values are selected in the current SSC correlation values, so that the weaker allowed is achieved. The cell is selected to improve the probability of cell _miss detection, and the frame start position corresponding to the I SSC correlation value whose number of occurrences exceeds the second preset number of thresholds is selected among the N×N _{SSC_Proc} × N_SSC SSC correlation values and Scrambling the code group number, this can achieve the screening of most invalid locations, retaining more effective locations.

Of course, in the embodiment of the present disclosure, the step of performing frame synchronization on the slot positions corresponding to the N PSC correlation values to select the frame start position and the scrambling code group number may also be implemented as follows:

For the slot positions corresponding to each of the above PSC correlation values, N _{SSC_Proc} times SSC correlation value combining is performed, and then, the combined SSC correlation values of all slot positions are performed from large to small. Sort, select the frame start position and scrambling code group number corresponding to the previous N_SSC SSC correlation values.

In some optional embodiments, the step of performing frame synchronization on a slot position corresponding to the N PSC correlation values to select a frame start position and a scrambling code group number, further includes:

Calculating a peak ratio of the SSC correlation value group of the slot position corresponding to each of the N PSC correlation values, where the SSC correlation value group of the slot position corresponding to one PSC correlation value includes the slot position _An SSC correlation value obtained by combining N _{SSC_Proc} times SSC correlation values, wherein the peak ratio is a ratio of a maximum SSC correlation value in the SSC correlation value group to a mean value of a correlation value modulus value in the SSC correlation value group;

Selecting N_PAR slot positions among N slot positions corresponding to the N PSC correlation values, wherein a peak ratio of the SSC correlation value group corresponding to the N_PAR slot positions is in the N SSC correlation value groups N_PAR before sorting in the peak ratio, wherein the N_PAR is a positive integer;

And selecting, in a frame start position and a scrambling code group number corresponding to the I SSC correlation value, a frame start position and a scrambling code group number corresponding to the J SSC correlation values, where the J SSC correlation values correspond to The slot position to which the frame start position belongs is the slot position in the N_PAR slot positions, and J is a positive integer.

In this embodiment, a peak comparison is performed for each slot position SSC correlation value group corresponding to the N PSC correlation values, and the N_PAR slot positions before the sorting in the peak ratio are selected, and then the frame corresponding to the I SSC correlation value is The frame start position and the scrambling code group number corresponding to the J SSC correlation values are selected in the start position and the scrambling code group number, that is, the frame start position corresponding to the I SSC correlation value and the corresponding time slot in the scrambling code group number The frame start position and the scrambling code group number that are not in the N_PAR slot positions are filtered out, and the step 204 uses the frame start position and the scrambling code group number corresponding to the J SSC correlation values to perform cell determination. In this way, the frame start position and the scrambling code group number corresponding to the lower slot position can be removed, thereby filtering out most invalid positions and reducing the amount of calculation. In addition, in the embodiment of the present disclosure, the frame start position and the scrambling code group number corresponding to the foregoing J SSC correlation values may be regarded as the second set, or the frame start position and the interference corresponding to the J SSC correlation values may be generated. The second set of code group numbers. The peak ratio may be a peak-to-average ratio of the coherent detection, and the average value of the correlation value modulus may be a mean value obtained by performing a modulo operation on each SSC correlation value in the SSC correlation value group. In addition, in this embodiment, the SSC correlation value group may be a correlation value of 64×15, where 64×15 is related to the frame structure of the WCDMA system, which is not limited thereto.

In some optional embodiments, the step of performing frame synchronization on a slot position corresponding to the N PSC correlation values to select a frame start position and a scrambling code group number, further includes:

Setting a frame start position and a scrambling code group number corresponding to the J SSC correlation values as a set, and selecting Y scrambling code group numbers in the set, each of the Y scrambling code group numbers The number of corresponding frame start positions of the code group number in the set is within a third predetermined number of thresholds, and the Y is a positive integer;

For each scrambling code group number of the Y scrambling code group numbers, a frame start position corresponding to the largest SSC correlation value among the SSC correlation values corresponding to the scrambling code group number is selected in the set.

In this embodiment, it is possible to implement, for each of the above-mentioned Y scrambling code group numbers, a frame corresponding to the largest SSC correlation value among the SSC correlation values corresponding to the scrambling code group number in the set. The starting position, so that the amount of calculation determined by the subsequent cells can be reduced. For example, the above set includes 6 groups of the same scrambling code group number (frame start position, scrambling code group number): [58214, 8], [58213, 8], [58212, 8], [58220, 8], [58211,8] and [58215,8], respectively, the corresponding SSC correlation values are: 10,9,8,7,6,5, that is, the scrambling code group number 8 has 6 corresponding start positions in the set. And the third preset number threshold (Mchip) is 10. Then, the largest SSC correlation value (or the strongest frame start position) among the SSC correlation values corresponding to the scrambling code group number 8 is [58214, 8], that is, only 58214 one frame start position is reserved between 58204 and 58224.

In this embodiment, the start position of the frame around the start position of the strongest frame in the same scrambling code group can be deleted, and the additional operation is further reduced. In addition, step 204 in this embodiment may be to perform cell determination based on selecting a frame start position and a scrambling code group number of the corresponding maximum value of the SSC correlation value. Further, a third set of a frame start position and a scrambling code group number including a maximum value of the SSC correlation value corresponding to each of the Y scrambling code group numbers may be generated, in step 204 in this embodiment. The cell determination may be based on the frame start position and the scrambling code group number within the set.

For the frame synchronization introduced in the foregoing multiple embodiments, reference may also be made to FIG. 4. As shown in FIG. 4, i is equal to 0, and the SIC of the i-th N _t slot is related, that is, the relevant operation is performed to obtain the SSC correlation value, and Accumulating correlation values; SSC correlation values of (i-1) N _t slots before merging (where, all are 0 for the first time); taking the frame corresponding to the largest N_SSC correlation values among the i-th merged SSC correlation values a starting position P_SSC,i and a scrambling code group number G_SSC,i; determining whether i is equal to N_SSC_Proc-1 (where N_SSC_Proc is equal to the above N _{SSC_Proc} ), and if not, then i+1, continuing the above steps, and if so, The position exceeding the Thres_SSC times of the N_SSC×N_SSC_Proc positions is recorded as the first set Aj (j=0, 1, . . . , N−1); and the correlation value corresponding to the N slot positions corresponding to the N PSC correlation values is calculated. The peak-to-average ratio (or may be referred to as the peak ratio) PARj is sorted, the sorting is not in the Aj of the previous N_PAR, and the remaining positions are recorded as C, that is, the second set, the scrambling code group is the same in C, the frame header (from the frame) Start position) retains only the strongest position within +/- Mchip, ie the frame start position is within the third preset number of thresholds, Frame start position corresponding to the selected frame start position of the scrambling code group number of the maximum correlation values SSC.

In some optional embodiments, the determining, based on the frame start location and the scrambling code group number, comprises:

For each symbol of the start position of the target frame in the selected frame start position, the H scrambling codes in the scrambling code group corresponding to the corresponding scrambling code group number are respectively used for descrambling and despreading, and each scrambling code is obtained. The M correlation values, where M is the number of symbols included in the start position of the target frame, where H is the number of scrambling codes included in the scrambling code group, wherein the target frame start position is the selected frame The starting position of any frame in the starting position;

Accumulating the M correlation values corresponding to each scrambling code to obtain H related power values;

Multiplying a minimum correlation power value of the H related power values by a preset power parameter value to obtain a power threshold value;

Determining whether there is a relevant power value greater than the power threshold value among the H related power values, and if there is a related power value greater than the power threshold value among the H related power values, determining the target There is a cell at the beginning of the frame.

The frame start position and the corresponding scrambling code group number are selected in step 203 to select a frame start position and a scrambling code group number, where the frame start position and the scrambling code group corresponding to the I SSC correlation value may be included. a frame start position and a scrambling code group number corresponding to the J or J SSC correlation values, and may also be a frame start of a maximum value of the SSC correlation value corresponding to each scrambling code group number of the Y scrambling code group numbers Location and corresponding scrambling code group number.

The above H may be 8, that is, one scrambling code group may include 8 scrambling codes, and the above M may be 150, that is, one frame includes 150 symbols, of course, these are examples, and the embodiment of the present disclosure is not limited thereto. For example, the above M may also be 100 or 300 or the like.

Since each symbol is descrambled and despread using H scrambling codes, there are H M correlation values for each scrambling code, for example, assuming 150 symbols per frame, and 8 descrambling for each symbol. Despreading, then each scrambling code corresponds to 150 correlation values. Then, the correlation values corresponding to each scrambling code are accumulated, and the H related power value rates can be obtained.

Found H

Minimum value

Calculated power threshold

Among them, _{Thres scramb} is a preset power parameter value. When H

If there is a threshold greater than the threshold η _Scramb , the cell is considered to exist. It should be noted that, since there may be multiple frame start positions selected in step 203, in this embodiment, the foregoing operations are performed for each frame start position to determine whether there is a cell in each frame start position.

In this embodiment, a comparison between the correlation power and the minimum correlation power in each scrambling code group can be implemented, and the missed detection of the weak cell when the frame start position and the scrambling code group are the same is effectively prevented.

It should be noted that, since the start position of the target frame is any one of the start positions of the selected frame start position, the start position of any one of the selected frame start positions may be performed. The method of determining the cell is not described here. In addition, for each frame start position selected, the power threshold may be calculated using the same preset power parameter value when performing cell determination. Of course, in some scenarios, different pre-frames are used for different frame start positions. The power parameter value is also achievable, and the embodiment of the present disclosure is not limited thereto.

In another implementation, the foregoing determining the cell based on the frame start location and the scrambling code group number may include:

Determining, according to each symbol of the start position of the target frame in the selected frame start position, a scrambling code corresponding to the largest correlation value among the H correlation values of the symbol, and adding a counter corresponding to the scrambling code, wherein each a counter corresponding to each scrambling code;

After all the symbols at the start position of the target frame are descrambled and despread, it is determined whether the counter corresponding to the H scrambling codes has a counter whose count exceeds the preset count threshold. If yes, there will be a count exceeding the preset count threshold. The scrambling code corresponding to the counter is determined as the cell primary scrambling code, and it is determined that the cell exists at the starting position of the target frame.

For example, suppose a frame of 150 symbols, each symbol must be descrambled and despread 8 times. There will be 8 correlation values for each symbol, and each correlation value corresponds to one scrambling code, and the 8 correlation values are the largest. The counter of the scrambling code corresponding to the correlation value is incremented by 1. When the counter of a certain scrambling code exceeds a preset counting threshold (for example, 38 or 40), the scrambling code can be determined as the cell primary scrambling code, and the corresponding frame is determined. There is a cell at the starting location. In an implementation manner, it may be implemented to determine whether a cell exists by using a counter to further avoid cell miss detection.

Similarly, since there may be multiple frame start positions selected in step 203, in this embodiment, the above operation is performed for each frame start position to determine whether there is a cell at the start position of each frame.

It should be noted that, in the embodiment of the present disclosure, the foregoing implementation manner of determining whether a cell exists by using a power threshold, and the foregoing implementation manner of determining whether a cell exists by using a counter may be implemented in combination, that is, as long as any basic one is satisfied. When the condition is met, it can be determined that the cell exists. For example, taking 8 scrambling codes as an example, as shown in FIG. 5, i is equal to 0, and the ith symbol is descrambled and despread by 8 scrambling codes to obtain a correlation value Corj (j=0, 1, 7, 7). ), the counter with the largest correlation value is incremented by 1 to obtain Rj, and the (i-1) correlation value before the combination is obtained by CorAllj (accumulated correlation power), and it is judged whether i is equal to 10N _t -1, and if not, then i is incremented by 1, and execution is continued. The above steps, if not, the minimum value of CorAllj is CorMin (minimum correlation power value), and if there is a scrambling code whose Rj exceeds ThresCnt (preset count threshold) or CorAllj>ThresScramb*CorMin (power threshold), the cell is considered Exist, otherwise it does not exist.

In the embodiment of the present disclosure, the foregoing method may be applied to the UE in the network structure shown in FIG. 1.

In the embodiment of the present disclosure, the N _{PSC_Proc} times PSC correlation value is combined and sorted, and the N_PSC PSC correlation values before the sorting are selected in the PSC correlation values after the combination to obtain N _{PSC_Proc} × N_PSC PSCs. a correlation value, wherein the N _{PSC_Proc} and the N_PSC are both positive integers; and among the N _{PSC_Proc} × N_PSC PSC correlation values, N PSC correlation values whose occurrence times exceed a first preset number of thresholds are selected, wherein the N a positive integer; frame synchronization is performed at a slot position corresponding to the N PSC correlation values to select a frame start position and a scrambling code group number; and cell determination is performed based on the frame start position and the scrambling code group number. Since the previous N_PSC PSC correlation values are selected for each combination, more cells can be selected, and then the _{number of} occurrences of the N _{PSC_Proc} × N_PSC PSC correlation values after the N _{PSC_Proc} merge is selected exceeds the first preset number of times. The N PSC correlation values of the threshold can reduce the probability of cell miss detection.

Referring to FIG. 6, an embodiment of the present disclosure provides a UE. As shown in FIG. 6, the UE 600 includes the following modules:

The merging module 601 is configured to perform N _{PSC_Proc} sub-PSC correlation value merging and sorting, and select, before each merging, the pre-sequencing N_PSC PSC correlation values in the current PSC correlation value to obtain N _{PSC_Proc} × N_PSC a PSC correlation value, wherein the N _{PSC_Proc} and the N_PSC are both positive integers;

The selecting module 602 is configured to select, among the N _{PSC_Proc} × N_PSC PSC correlation values, N PSC correlation values that the number of occurrences exceeds a first preset number of thresholds, where the N is a positive integer;

a frame synchronization module 603, configured to perform frame synchronization on a slot position corresponding to the N PSC correlation values, to select a frame start position and a scrambling code group number;

The determining module 604 is configured to perform cell determination based on the frame start position and the scrambling code group number.

In some optional embodiments, as shown in FIG. 7, the frame synchronization module 603 includes:

The first merging unit 6031 is configured to perform N _{SSC_Proc} times SSC correlation value merging and sorting for the slot positions corresponding to each of the N PSC correlation values, and after each merging, after the merging Selecting the pre-sequence N_SSC SSC correlation values in the SSC correlation values to obtain N×N _{SSC_Proc} × N_SSC SSC correlation values, wherein each SSC correlation value corresponds to one frame start position and one scrambling code group number, and N _{SSC_Proc} and N_SSC are both positive integers;

The first selecting unit 6032 is configured to select, among the N×N _{SSC_Proc} ×N_SSC SSC correlation values, one SSC correlation value that the number of occurrences exceeds a threshold of the second preset number of times, and select the corresponding one of the SSC correlation values. The frame start position and the scrambling code group number, and the I is a positive integer.

In some optional embodiments, as shown in FIG. 8, the frame synchronization module 603 further includes:

The calculating unit 6033 is configured to calculate a peak ratio of the SSC correlation value group of the slot position corresponding to each of the N PSC correlation values, where the SSC correlation value group of the slot position corresponding to one PSC correlation value And including, by the slot position, an SSC correlation value obtained by combining N _{SSC_Proc} times SSC correlation values, where the peak ratio is a ratio of a maximum SSC correlation value in the SSC correlation value group to a mean value of a correlation value modulus value in the SSC correlation value group. ;

a second selecting unit 6034, configured to select N_PAR slot positions in the N slot positions corresponding to the N PSC correlation values, where a peak ratio of the SSC correlation value group corresponding to the N_PAR slot positions is a N_PAR of the peak ratio of the N SSC correlation value groups, wherein the N_PAR is a positive integer;

a third selecting unit 6035, configured to select a frame start position and a scrambling code group number corresponding to the J SSC correlation values in a frame start position and a scrambling code group number corresponding to the I SSC correlation values, where The slot position to which the frame start position corresponding to the J SSC correlation values belongs is the slot position in the N_PAR slot positions, and the J is a positive integer.

In some optional embodiments, as shown in FIG. 9, the frame synchronization module 603 further includes:

a fourth selecting unit 6036, configured to use, as a set, a frame start position and a scrambling code group number corresponding to the J SSC correlation values, and select Y scrambling code group numbers in the set, the Y interferences The number of each scrambling code group number in the code group number in the set is within a third predetermined number of thresholds, and the Y is a positive integer;

a fifth selecting unit 6037, configured to: for each scrambling code group number of the Y scrambling code group numbers, select, in the set, a SSC correlation value corresponding to a largest SSC correlation value corresponding to the scrambling code group number The starting position of the frame.

In some optional embodiments, as shown in FIG. 10, the determining module 604 includes:

The descrambling and despreading unit 6041 is configured to descramble each of the symbols of the target frame start position in the selected frame start position by using the H scrambling codes in the scrambling code group corresponding to the corresponding scrambling code group number. De-spreading, obtaining M correlation values corresponding to each scrambling code, where M is the number of symbols included in the start position of the target frame, where H is the number of scrambling codes included in the scrambling code group, wherein The start position of the target frame is any one of the start positions of the selected frame start position;

The accumulating unit 6042 is configured to accumulate the M correlation values corresponding to each scrambling code to obtain H related power values;

The power calculation unit 6043 is configured to multiply the minimum correlation power value of the H related power values by a preset power parameter value to obtain a power threshold value;

The determining unit 6044 is configured to determine whether there is a related power value that is greater than the power threshold value, and if there is a related power value that is greater than the power threshold value among the H related power values, And determining that a cell exists in the start position of the target frame.

It should be noted that, in this embodiment, the foregoing UE 600 may be the UE in the embodiment shown in FIG. 1 to FIG. 5, and any implementation manner of the UE in the embodiment shown in FIG. 1 to FIG. 5 may be used in this embodiment. The foregoing UE 600 implements and achieves the same beneficial effects, and details are not described herein again.

Referring to FIG. 11, an embodiment of the present disclosure further provides a UE, where the UE includes: a processor 1100, a transceiver 1110, a memory 1120, a user interface 1130, and a bus interface, where:

The processor 1100 is configured to read a program in the memory 1120 and perform the following process:

Performing N _{PSC_Proc} times PSC correlation value merging and sorting, and _selecting , before each merging, the pre-sequencing N_PSC PSC correlation values in the current PSC correlation value to obtain N _{PSC_Proc} × N_PSC PSC correlation values, where The N _{PSC_Proc} and the N_PSC are both positive integers;

_Selecting, in the N _{PSC_Proc} × N_PSC PSC correlation values, N PSC correlation values whose number of occurrences exceeds a first preset number of thresholds, wherein the N is a positive integer;

Performing frame synchronization at a slot position corresponding to the N PSC correlation values to select a frame start position and a scrambling code group number;

Cell determination is performed based on the frame start position and the scrambling code group number.

The transceiver 1110 is configured to receive and transmit data under the control of the processor 1100.

In Figure 11, the bus architecture may include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 1100 and various circuits of memory represented by memory 1120. The bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein. The bus interface provides an interface. The transceiver 1110 can be a plurality of components, including a transmitter and a receiver, providing means for communicating with various other devices on a transmission medium. For different user equipments, the user interface 1130 may also be an interface capable of externally connecting the required devices, including but not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.

The processor 1100 is responsible for managing the bus architecture and general processing, and the memory 1120 can store data used by the processor 1100 in performing operations.

In some optional embodiments, performing frame synchronization on the slot positions corresponding to the N PSC correlation values performed by the processor 1100 to select a frame start position and a scrambling code group number, including:

And performing N _{SSC_Proc} times SSC correlation value merging and sorting for the slot positions corresponding to each of the N PSC correlation values, and selecting the sorting among the merged SSC correlation values after each combination N_SSC SSC correlation values to obtain N×N _{SSC_Proc} × N_SSC SSC correlation values, wherein each SSC correlation value corresponds to one frame start position and one scrambling code group number, and the N _{SSC_Proc} and N_SSC are positive integers ;

_Selecting, among the N×N _{SSC_Proc} ×N_SSC SSC correlation values, an ISC correlation value whose number of occurrences exceeds a second preset number of thresholds, and selecting a frame start position and a scrambling code group corresponding to the I SSC correlation values. Number, the I is a positive integer.

In some optional embodiments, the processor 1100 performs frame synchronization on a slot position corresponding to the N PSC correlation values to select a frame start position and a scrambling code group number, and further includes:

Calculating a peak ratio of the SSC correlation value group of the slot position corresponding to each of the N PSC correlation values, where the SSC correlation value group of the slot position corresponding to one PSC correlation value includes the slot position _An SSC correlation value obtained by combining N _{SSC_Proc} times SSC correlation values, wherein the peak ratio is a ratio of a maximum SSC correlation value in the SSC correlation value group to a mean value of a correlation value modulus value in the SSC correlation value group;

Selecting N_PAR slot positions among N slot positions corresponding to the N PSC correlation values, wherein a peak ratio of the SSC correlation value group corresponding to the N_PAR slot positions is in the N SSC correlation value groups N_PAR before sorting in the peak ratio, wherein the N_PAR is a positive integer;

And selecting, in a frame start position and a scrambling code group number corresponding to the I SSC correlation value, a frame start position and a scrambling code group number corresponding to the J SSC correlation values, where the J SSC correlation values correspond to The slot position to which the frame start position belongs is the slot position in the N_PAR slot positions, and J is a positive integer.

In some optional embodiments, the processor 1100 performs frame synchronization on a slot position corresponding to the N PSC correlation values to select a frame start position and a scrambling code group number, and further includes:

Setting a frame start position and a scrambling code group number corresponding to the J SSC correlation values as a set, and selecting Y scrambling code group numbers in the set, each of the Y scrambling code group numbers The number of corresponding frame start positions of the code group number in the set is within a third predetermined number of thresholds, and the Y is a positive integer;

For each scrambling code group number of the Y scrambling code group numbers, a frame start position corresponding to the largest SSC correlation value among the SSC correlation values corresponding to the scrambling code group number is selected in the set.

In some optional embodiments, the performing, by the processor 1100, performing cell determination based on the frame start location and the scrambling code group number, including:

For each symbol of the start position of the target frame in the selected frame start position, the H scrambling codes in the scrambling code group corresponding to the corresponding scrambling code group number are respectively used for descrambling and despreading, and each scrambling code is obtained. The M correlation values, where M is the number of symbols included in the start position of the target frame, where H is the number of scrambling codes included in the scrambling code group, wherein the target frame start position is the selected frame The starting position of any frame in the starting position;

Accumulating the M correlation values corresponding to each scrambling code to obtain H related power values;

Multiplying a minimum correlation power value of the H related power values by a preset power parameter value to obtain a power threshold value;

Determining whether there is a relevant power value greater than the power threshold value among the H related power values, and if there is a related power value greater than the power threshold value among the H related power values, determining the target There is a cell at the beginning of the frame.

It should be noted that, in this embodiment, the foregoing UE may be the UE in the embodiment shown in FIG. 1 to FIG. 5, and any implementation manner of the UE in the embodiment shown in FIG. 1 to FIG. 5 may be used in this embodiment. The foregoing UE implements and achieves the same beneficial effects, and details are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed method and apparatus may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.

In addition, each functional unit in various embodiments of the present disclosure may be integrated into one processing unit, or each unit may be physically included separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of hardware plus software functional units.

The above-described integrated unit implemented in the form of a software functional unit can be stored in a computer readable storage medium. The above software functional unit is stored in a storage medium and includes a plurality of instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform part of the steps of the transceiving method of the various embodiments of the present disclosure. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like, and the program code can be stored. Medium.

The above is a preferred embodiment of the present disclosure, and it should be noted that those skilled in the art can also make several improvements and refinements without departing from the principles of the present disclosure. It should be considered as the scope of protection of this disclosure.

Claims (15)

1. A cell search method includes:

   Perform N _{PSC_Proc} secondary primary synchronization code PSC correlation value combination and ordering, and select N_PSC PSC correlation values before sorting in the current combined PSC correlation value after each combination to obtain N _{PSC_Proc} × N_PSC PSC correlation values Wherein the N _{PSC_Proc} and the N_PSC are both positive integers;

   _Selecting, in the N _{PSC_Proc} × N_PSC PSC correlation values, N PSC correlation values whose number of occurrences exceeds a first preset number of thresholds, wherein the N is a positive integer;

   Performing frame synchronization at a slot position corresponding to the N PSC correlation values to select a frame start position and a scrambling code group number;

   Cell determination is performed based on the frame start position and the scrambling code group number.
2. The method of claim 1, wherein the frame synchronization is performed at a slot position corresponding to the N PSC correlation values to select a frame start position and a scrambling code group number, including:

   And performing S _{S S S S S S S S S S S S S S} Selecting the pre-sequence N_SSC SSC correlation values to obtain N×N _{SSC_Proc} × N_SSC SSC correlation values, where each SSC correlation value corresponds to one frame start position and one scrambling code group number, and the N _{SSC_Proc} and N_SSC are both Is a positive integer;

   _Selecting, among the N×N _{SSC_Proc} ×N_SSC SSC correlation values, an ISC correlation value whose number of occurrences exceeds a second preset number of thresholds, and selecting a frame start position and a scrambling code group corresponding to the I SSC correlation values. Number, the I is a positive integer.
3. The method of claim 2, wherein the step of performing frame synchronization at a slot position corresponding to the N PSC correlation values to select a frame start position and a scrambling code group number, further comprising:

   Calculating a peak ratio of the SSC correlation value group of the slot position corresponding to each of the N PSC correlation values, where the SSC correlation value group of the slot position corresponding to one PSC correlation value includes the slot position _An SSC correlation value obtained by combining N _{SSC_Proc} times SSC correlation values, wherein the peak ratio is a ratio of a maximum SSC correlation value in the SSC correlation value group to a mean value of a correlation value modulus value in the SSC correlation value group;

   Selecting N_PAR slot positions in the N slot positions corresponding to the N PSC correlation values, wherein a peak ratio of the SSC correlation value group corresponding to the N_PAR slot positions is in the N SSC correlation value groups N_PAR before sorting in the peak ratio, wherein the N_PAR is a positive integer;

   And selecting, in a frame start position and a scrambling code group number corresponding to the I SSC correlation value, a frame start position and a scrambling code group number corresponding to the J SSC correlation values, where the J SSC correlation values correspond to The slot position to which the frame start position belongs is the slot position in the N_PAR slot positions, and J is a positive integer.
4. The method of claim 3, wherein the step of performing frame synchronization at a slot position corresponding to the N PSC correlation values to select a frame start position and a scrambling code group number, further comprising:

   Setting a frame start position and a scrambling code group number corresponding to the J SSC correlation values as a set, and selecting Y scrambling code group numbers in the set, each of the Y scrambling code group numbers The number of corresponding frame start positions of the code group number in the set is within a third predetermined number of thresholds, and the Y is a positive integer;

   For each scrambling code group number of the Y scrambling code group numbers, a frame start position corresponding to the largest SSC correlation value among the SSC correlation values corresponding to the scrambling code group number is selected in the set.
5. The method according to any one of claims 1 to 4, wherein the performing the cell determination based on the frame start position and the scrambling code group number comprises:

   For each symbol of the start position of the target frame in the selected frame start position, the H scrambling codes in the scrambling code group corresponding to the corresponding scrambling code group number are respectively used for descrambling and despreading, and each scrambling code is obtained. The M correlation values, where M is the number of symbols included in the start position of the target frame, where H is the number of scrambling codes included in the scrambling code group, wherein the target frame start position is the selected frame The starting position of any frame in the starting position;

   Accumulating the M correlation values corresponding to each scrambling code to obtain H related power values;

   Multiplying a minimum correlation power value of the H related power values by a preset power parameter value to obtain a power threshold value;

   Determining whether there is a relevant power value greater than the power threshold value among the H related power values, and if there is a related power value greater than the power threshold value among the H related power values, determining the target There is a cell at the beginning of the frame.
6. A user terminal comprising:

   The merging module is configured to perform N _{PSC_Proc} PSC correlation value merging and sorting, and select N_PSC PSC correlation values in the PSC correlation values after the merging after each merging to obtain N _{PSC_Proc} × N_PSC PSCs a correlation value, wherein the N _{PSC_Proc} and the N_PSC are both positive integers;

   a selection module, configured to select, among the N _{PSC_Proc} × N_PSC PSC correlation values, N PSC correlation values whose occurrence times exceed a first preset number of thresholds, wherein the N is a positive integer;

   a frame synchronization module, configured to perform frame synchronization on a slot position corresponding to the N PSC correlation values, to select a frame start position and a scrambling code group number;

   And a determining module, configured to perform cell determination based on the frame start position and the scrambling code group number.
7. The user terminal of claim 6, wherein the frame synchronization module comprises:

   a first merging unit, configured to perform N _{SSC_Proc} times SSC correlation value merging and sorting for a slot position corresponding to each of the N PSC correlation values, and each merged after the merging Selecting the pre-sequence N_SSC SSC correlation values in the SSC correlation values to obtain N×N _{SSC_Proc} × N_SSC SSC correlation values, where each SSC correlation value corresponds to one frame start position and one scrambling code group number, and the N _{Both SSC_Proc} and N_SSC are positive integers;

   a first selecting unit, configured to select, among the N×N _{SSC_Proc} ×N_SSC SSC correlation values, an ISC correlation value that occurs more than a second preset number of thresholds, and select a frame corresponding to the I SSC correlation value The starting position and the scrambling code group number, and the I is a positive integer.
8. The user terminal of claim 7, wherein the frame synchronization module further comprises:

   a calculating unit, configured to calculate a peak ratio of the SSC correlation value group of the slot position corresponding to each of the N PSC correlation values, where the SSC correlation value group of the slot position corresponding to one PSC correlation value includes The slot position is obtained by combining the _{SSC_Proc} times SSC correlation values, and the peak ratio is the ratio of the maximum SSC correlation value in the SSC correlation value group to the mean value of the correlation value modulus values in the SSC correlation value group;

   a second selecting unit, configured to select N_PAR slot positions among N slot positions corresponding to the N PSC correlation values, where a peak ratio of the SSC correlation value group corresponding to the N_PAR slot positions is Determining the pre-sequence N_PAR in the peak ratio of the N SSC correlation value groups, wherein the N_PAR is a positive integer;

   a third selecting unit, configured to select, according to a frame start position and a scrambling code group number corresponding to the I SSC correlation values, a frame start position and a scrambling code group number corresponding to the J SSC correlation values, where the The slot position to which the frame start position corresponding to the J SSC correlation values belongs is the slot position in the N_PAR slot positions, and the J is a positive integer.
9. The user terminal of claim 8, wherein the frame synchronization module further comprises:

   a fourth selecting unit, configured to use, as a set, a frame start position and a scrambling code group number corresponding to the J SSC correlation values, and select Y scrambling code group numbers in the set, the Y scrambling codes The number of each scrambling code group number in the group number in the set is within a third predetermined number of thresholds, and the Y is a positive integer;

   a fifth selecting unit, configured to: for each scrambling code group number of the Y scrambling code group numbers, select, in the set, a SSC correlation value corresponding to a largest SSC correlation value corresponding to the scrambling code group number The starting position of the frame.
10. The user terminal according to any one of claims 6 to 9, wherein the determining module comprises:

    The descrambling and despreading unit is configured to perform descrambling on each of the symbols of the target frame start position in the selected frame start position by using the H scrambling codes in the scrambling code group corresponding to the corresponding scrambling code group number. Expanding, obtaining M correlation values corresponding to each scrambling code, where M is a number of symbols included in a start position of the target frame, where H is a number of scrambling codes included in the scrambling code group, wherein the target The start position of the frame is any one of the start positions of the selected frame start position;

    An accumulating unit, configured to accumulate M correlation values corresponding to each scrambling code to obtain H related power values;

    a power calculation unit, configured to multiply a minimum correlation power value of the H related power values by a preset power parameter value to obtain a power threshold value;

    a determining unit, configured to determine whether there is a related power value that is greater than the power threshold value, and if there is a related power value that is greater than the power threshold value in the H related power values, Then determining that there is a cell at the start position of the target frame.
11. A user terminal includes: a processor, a transceiver, a memory, a user interface, and a bus interface, wherein:

    The processor is configured to read a program in the memory and perform the following process:

    Performing N _{PSC_Proc} times PSC correlation value merging and sorting, and _selecting , before each merging, the pre-sequencing N_PSC PSC correlation values in the current PSC correlation value to obtain N _{PSC_Proc} × N_PSC PSC correlation values, where The N _{PSC_Proc} and the N_PSC are both positive integers;

    _Selecting, in the N _{PSC_Proc} × N_PSC PSC correlation values, N PSC correlation values whose number of occurrences exceeds a first preset number of thresholds, wherein the N is a positive integer;

    Performing frame synchronization at a slot position corresponding to the N PSC correlation values to select a frame start position and a scrambling code group number;

    Cell determination is performed based on the frame start position and the scrambling code group number.
12. The user terminal according to claim 11, wherein the frame synchronization performed by the processor at the slot positions corresponding to the N PSC correlation values to select a frame start position and a scrambling code group number includes:

    And performing N _{SSC_Proc} times SSC correlation value merging and sorting for the slot positions corresponding to each of the N PSC correlation values, and selecting the sorting among the merged SSC correlation values after each combination N_SSC SSC correlation values to obtain N×N _{SSC_Proc} × N_SSC SSC correlation values, wherein each SSC correlation value corresponds to one frame start position and one scrambling code group number, and the N _{SSC_Proc} and N_SSC are positive integers ;

    _Selecting, among the N×N _{SSC_Proc} ×N_SSC SSC correlation values, an ISC correlation value whose number of occurrences exceeds a second preset number of thresholds, and selecting a frame start position and a scrambling code group corresponding to the I SSC correlation values. Number, the I is a positive integer.
13. The user terminal according to claim 12, wherein the processor performs frame synchronization at a slot position corresponding to the N PSC correlation values to select a frame start position and a scrambling code group number, and further includes :

    Calculating a peak ratio of the SSC correlation value group of the slot position corresponding to each of the N PSC correlation values, where the SSC correlation value group of the slot position corresponding to one PSC correlation value includes the slot position _An SSC correlation value obtained by combining N _{SSC_Proc} times SSC correlation values, wherein the peak ratio is a ratio of a maximum SSC correlation value in the SSC correlation value group to a mean value of a correlation value modulus value in the SSC correlation value group;

    Selecting N_PAR slot positions among N slot positions corresponding to the N PSC correlation values, wherein a peak ratio of the SSC correlation value group corresponding to the N_PAR slot positions is in the N SSC correlation value groups N_PAR before sorting in the peak ratio, wherein the N_PAR is a positive integer;

    And selecting, in a frame start position and a scrambling code group number corresponding to the I SSC correlation value, a frame start position and a scrambling code group number corresponding to the J SSC correlation values, where the J SSC correlation values correspond to The slot position to which the frame start position belongs is the slot position in the N_PAR slot positions, and J is a positive integer.
14. The user terminal according to claim 13, wherein the processor performs frame synchronization at a slot position corresponding to the N PSC correlation values to select a frame start position and a scrambling code group number, and further includes :

    Setting a frame start position and a scrambling code group number corresponding to the J SSC correlation values as a set, and selecting Y scrambling code group numbers in the set, each of the Y scrambling code group numbers The number of corresponding frame start positions of the code group number in the set is within a third predetermined number of thresholds, and the Y is a positive integer;

    For each scrambling code group number of the Y scrambling code group numbers, a frame start position corresponding to the largest SSC correlation value among the SSC correlation values corresponding to the scrambling code group number is selected in the set.
15. The user terminal according to any one of claims 11 to 14, wherein the performing, by the processor, performing cell determination based on the frame start position and the scrambling code group number comprises:

    For each symbol of the start position of the target frame in the selected frame start position, the H scrambling codes in the scrambling code group corresponding to the corresponding scrambling code group number are respectively used for descrambling and despreading, and each scrambling code is obtained. The M correlation values, where M is the number of symbols included in the start position of the target frame, where H is the number of scrambling codes included in the scrambling code group, wherein the target frame start position is the selected frame The starting position of any frame in the starting position;

    Accumulating the M correlation values corresponding to each scrambling code to obtain H related power values;

    Multiplying a minimum correlation power value of the H related power values by a preset power parameter value to obtain a power threshold value;

    Determining whether there is a relevant power value greater than the power threshold value among the H related power values, and if there is a related power value greater than the power threshold value among the H related power values, determining the target There is a cell at the beginning of the frame.

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