CN102076018B - Method and device for detecting physical broadcast channel - Google Patents

Abstract

The embodiment of the present invention provides a method and device for detecting a physical broadcast channel, the method comprising: collecting the first wireless frame data; performing physical broadcast channel detection on the first wireless frame data; if a physical broadcast channel is detected information, end the current detection. Applying the embodiment of the present invention, when the data is less than 40ms, the required PBCH information can be obtained by placing the data in different positions of the PBCH Buffer for traversal and analysis. Usually, the PBCH information can be detected within 10ms, greatly reducing the It reduces the detection delay and provides guarantee for other business operations such as UE access and handover.

Description

A method and device for detecting a physical broadcast channel

technical field

The present invention relates to the technical field of detecting physical broadcast channels, in particular to a method and device for detecting physical broadcast channels.

Background technique

In the long-term evolution system (LTE, Long Term Evolution) cellular system, the base station codes and modulates the public information of the cell such as the number of antennas and bandwidth, and sends it cyclically on the physical broadcast channel (PBCH, Physical Broadcasting Channel) at a certain period. User equipment (UE) Obtain the necessary cell public information and system wireless frame number (FN, Frame Number) for network access by detecting PBCH.

The radio frame length of the LTE system is 10 ms, and the PBCH transmission cycle is 40 ms, that is, four consecutive radio frames are sent as a cycle.

The specific transmission process of PBCH is introduced as follows:

The PBCH transport block (Transport Block, hereinafter referred to as PBCH TB) includes the public information of the cell such as the number of cell antennas, bandwidth, and system frame number.

First, add a 16Bit cyclic redundancy check code (CRC, Cyclic redundancy code) to the PBCH transport block (TB, Transport Block, PBCH TB for short). Perform convolutional coding (CC) encoding.

After that, rate matching (Rate Matching) is performed. Since the number of bits encoded by the CC is much smaller than the number of bits that can be carried by the time-frequency resources occupied by the PBCH, the rate matching operation here is actually to repeat the information encoded by the PBCH many times.

Then, scramble and modulate the rate-matched code; the modulated data is divided into four equal parts. They are respectively mapped to four consecutive radio frames. Each radio frame has reserved time-frequency resources for sending PBCH. The frame number (FN) of the first wireless frame satisfies MOD(FN,4)=0.

In the prior art, a sliding window method is used to detect PBCH, see FIG. 1 , which is a schematic diagram of an existing PBCH detection scheme. Specifically include the following steps:

Step 1. Allocate a piece of memory (Buffer) as the PBCH Buffer, which is used as the input of the PBCH detection module, and its size is equal to 40ms PBCH data. Divide the PBCH Buffer into four equal parts, numbered 0, 1, 2 and 3;

Step 2, collect 40ms data (that is, 4 radio frames) data, and extract PBCH data from it.

Step 3: Fill the data obtained in the second step into parts 0, 1, 2 and 3 of the PBCH Buffer in sequence. Perform PBCH detection. If the detection is successful, the PBCH detection ends, and the frame number of the radio frame at this time satisfies MOD(FN,4)=0. Otherwise, go to step 4.

Step 4: Receive the next 10ms data, and at the same time discard the first 10ms data in the old data to form a new 40ms data. Repeat the detection steps. This process is repeated cyclically until the PBCH is detected.

It can be seen that the detection of PBCH in the prior art takes a lot of time, at least 40ms. Usually, it may take up to 70ms to detect PBCH information under the premise of the same cycle, which affects the UE network access speed and handover speed in some scenarios.

Contents of the invention

Embodiments of the present invention provide a method and device for detecting a physical broadcast channel, which can reduce detection delay and improve detection speed, thereby reducing UE network access delay and handover delay in certain scenarios.

An embodiment of the present invention provides a method for detecting a physical broadcast channel, including:

Collect the first wireless frame data;

Perform physical broadcast channel PBCH detection on the first wireless frame data;

If the physical broadcast channel information is detected, the current detection ends.

The embodiment of the present invention also provides a device for detecting a physical broadcast channel, including:

a collection unit, configured to collect the first wireless frame data;

The detection unit is configured to perform PBCH detection on the first radio frame data, and end the current detection if physical broadcast channel information is detected.

Applying the method and device for detecting a physical broadcast channel provided by the embodiments of the present invention, after receiving a data frame, the PBCH data in the data frame can be placed in the PBCH Buffer for analysis, and the required PBCH information can be obtained, usually PBCH information can be detected within 10ms, which effectively reduces the detection delay and provides guarantee for other business operations such as UE access and handover.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

FIG. 1 is a schematic diagram of an existing PBCH detection scheme;

FIG. 2 is a flowchart of a method for detecting a physical broadcast channel according to an embodiment of the present invention;

Fig. 3 is a flowchart according to a specific example of the present invention;

FIG. 4 is a schematic diagram of a solution for performing PBCH detection on a radio frame according to an embodiment of the present invention;

5 is a schematic diagram of a solution for performing PBCH detection on two radio frames according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of a solution for performing PBCH detection on three radio frames according to an embodiment of the present invention;

Fig. 7 is a schematic structural diagram of an apparatus for detecting a physical broadcast channel according to an embodiment of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

Referring to FIG. 2, it is a flow chart of a method for detecting a physical broadcast channel according to an embodiment of the present invention. The method specifically includes:

Step 201, collecting the first wireless frame data;

Usually, one wireless frame is 10ms data;

Step 202, performing PBCH detection on the first wireless frame data;

In step 203, when the physical broadcast channel information is detected, the current detection is ended.

It should be noted that, if no physical broadcast channel information is detected through the first wireless frame, the method described in FIG. 2 may further include: collecting data of a second wireless frame; The frame data is detected by PBCH; if the physical broadcast channel information is detected, the current detection is ended.

It should be noted that, if no physical broadcast channel information is detected through the first and second radio frames, the method described in FIG. 2 may further include: collecting data of a third radio frame; The second and third wireless frame data are detected by PBCH; if the physical broadcast channel information is detected, the current detection is ended.

It should be noted that, if no physical broadcast channel information is detected through the first, second and third radio frames, the method described in FIG. 2 may further include: collecting data of a fourth radio frame; The first to fourth wireless frame data are detected by PBCH; if the physical broadcast channel information is detected, the current detection is ended.

It should be noted that if no physical broadcast channel information is detected through the first to fourth wireless frames, another wireless frame (10ms data) is collected, and the initial 10ms data in the old data is discarded to form a New 40ms data. The detection step by performing PBCH detection on the first to fourth radio frames is repeated. This process is repeated cyclically until the PBCH is detected.

By applying the method provided by the embodiment of the present invention, as long as a wireless frame is received, the wireless frame data can be analyzed by placing the wireless frame data in the PBCH Buffer, for example, in different positions of the PBCH Buffer for traversal analysis, and the required PBCH can be obtained Usually, PBCH information can be detected within 10ms, which effectively reduces the detection delay and provides guarantee for other business operations such as UE access and handover.

The present invention will be described in detail below in conjunction with specific embodiments.

Referring to Fig. 3, it is a flowchart according to a specific example of the present invention, specifically including:

Step 301, collecting the first wireless frame data; the wireless frame is 10ms data;

Step 302, performing PBCH detection on the above-mentioned first wireless frame data, judging whether PBCH information is detected, if so, then end, otherwise execute step 303;

Referring to FIG. 4 , it is a schematic diagram of a solution for performing PBCH detection on a wireless frame according to an embodiment of the present invention. In the figure, a long square on the left represents the length of a wireless frame, that is, 10 ms data, wherein the grid part represents the The corresponding data for PBCH detection in the 10ms data, and the four figures on the right indicate that the corresponding data for PBCH detection in the 10ms data is put into parts 0, 1, 2, and 3 of the PCHC buffer in sequence. With reference to Figure 3 and Figure 4, this step may specifically include:

i) Allocate the memory (Buffer) used as the input of PBCH detection. The memory is the data size corresponding to 40msPBCH. Divide the memory into 4 equal parts, and each part is numbered as Part 0, Part 1, Part 2 and Part 2 in turn. 3 parts;

ii) Extract the data corresponding to PBCH from the first wireless frame data, that is, 10ms data;

iii) Put the data corresponding to the PBCH extracted in step ii) into part 0 of the PBCH memory, set the remaining three parts to zero, and perform PBCH detection. If the physical broadcast channel (PBCH) information is detected, it will end, otherwise execute step iv);

It should be noted that when the PBCH information is detected in this case, it can be known at the same time that the frame number of the wireless frame satisfies MOD(FN,4)=0;

It should be noted that the specific implementation process of the PBCH detection involved in the above iii) is the same as the existing implementation process, and will not be described in detail, and the following is similar.

iv) Put the data corresponding to the PBCH extracted in step ii) into the first part of the PBCH memory, set the remaining three parts to zero, and perform PBCH detection. If the physical broadcast channel information is detected, then end, otherwise perform step v );

It should be noted that when the PBCH information is detected in this case, it can be known that the frame number of the wireless frame at this time satisfies MOD(FN,4)=1;

v) Put the data corresponding to the PBCH extracted in step ii) into the second part of the PBCH memory, set the remaining three parts to zero, and perform PBCH detection. If the physical broadcast channel information is detected, then end, otherwise perform step vi );

It should be noted that when the PBCH information is detected in this case, it can be known that the frame number of the wireless frame at this time satisfies MOD(FN,4)=2;

vi) Put the data corresponding to the PBCH extracted in step ii) into the third part of the PBCH memory, set the remaining three parts to zero, and perform PBCH detection. If the physical broadcast channel information is detected, then end, otherwise execute step 303 ;

It should be noted that when the PBCH information is detected in this case, it can be known that the frame number of the wireless frame at this time satisfies MOD(FN,4)=3;

Step 303, collecting the second wireless frame data; the wireless frame is also 10ms data;

Step 304, performing PBCH detection on the first and second wireless frame data, and judging whether PBCH information is detected, if so, then end, otherwise execute step 305;

Since two 10ms data needs to be detected, there are two situations as follows:

Situation 1: The first wireless frame and the second wireless frame belong to different periods, that is, the two 10ms data belong to two 40ms periods before and after; in this case, the latter 10ms data can be used as input to independently perform the aforementioned step 302 detection steps;

Case 2: The first wireless frame and the second wireless frame belong to the same cycle, that is, the two 10ms data belong to the same 40ms cycle; in this case, the first and second wireless frames can be jointly detected.

For the above two situations, step 304 may specifically include:

01) Extract the data corresponding to PBCH from the second radio frame;

02) Perform independent PBCH detection on the second wireless frame, if the physical broadcast channel information is detected, end the current detection; otherwise, perform step 03);

It should be noted that, if physical broadcast channel information is detected, it may be further determined that the first wireless frame and the second wireless frame belong to different periods; if no physical broadcast channel information is detected, it may be further determined that the first wireless frame The radio frame and the second radio frame belong to the same cycle;

03) Performing joint detection on the first and second wireless frames, the joint detection specifically includes the following steps:

Referring to FIG. 5 , it is a schematic diagram of a scheme for performing PBCH detection on two radio frames according to an embodiment of the present invention. In the figure, the two long squares on the left represent two radio frame data respectively, and the length of each radio frame data is It is 10ms data, where the grid part represents the corresponding data for PBCH detection in the first 10ms data, the vertical line part represents the corresponding data for PBCH detection in the second 10ms data, and the three figures on the right It means that the corresponding data for PBCH detection among the two 10ms data is put into parts 0 and 1, 1 and 2, and 2 and 3 in the PCHC buffer in sequence. With reference to Figure 3 and Figure 5, this step may specifically include:

i) Put the data corresponding to the PBCH extracted from the two wireless frames into the 0 and 1 parts of the PBCH memory, set the other two parts to zero, and perform PBCH detection. If the physical broadcast channel information is detected, it will end, otherwise Execute step ii);

It should be noted that when the PBCH information is detected in this case, it can be known at the same time that the frame number of the wireless frame satisfies MOD(FN,4)=0;

ii) Put the extracted data corresponding to the PBCH into the first and second parts of the PBCH memory, set the remaining two parts to zero, and perform PBCH detection. If the physical broadcast channel information is detected, then end, otherwise, perform step iii);

It should be noted that when the PBCH information is detected in this case, it can be known that the frame number of the wireless frame at this time satisfies MOD(FN,4)=1;

iii) Put the extracted data corresponding to the PBCH into the second and third parts of the PBCH memory, set the remaining two parts to zero, and perform PBCH detection. If the physical broadcast channel information is detected, then end, otherwise, perform step 305;

It should be noted that when the PBCH information is detected in this case, it can be known that the frame number of the wireless frame at this time satisfies MOD(FN,4)=2;

Step 305, collecting the third wireless frame data; the wireless frame is also 10ms data;

Step 306, performing PBCH detection on the first, second and third wireless frame data, and judging whether PBCH information is detected, if so, then end, otherwise execute step 307;

Since three 10ms data need to be detected, there are the following three situations:

Case 1: The first and second wireless frames belong to the same period, the third wireless frame and the first two wireless frames belong to different periods, that is, the first two 10ms data belong to the previous 40ms period, and the last 10ms data belongs to the latter 40ms period ; In this case, the third 10ms data can be used as an input to independently perform the detection step described in the aforementioned step 302;

Situation 2: The first wireless frame and the second and third wireless frames belong to different periods. Specifically, the previous 10ms data belongs to the previous 40ms period, and the last two 10ms data belong to the latter 40ms period; in this case The second and third radio frames can be jointly detected; wherein, the step of joint detection of two frames can refer to the aforementioned step 304;

Case 3: The first to third wireless frames all belong to the same cycle, that is, the three 10ms data belong to the same 40ms cycle; in this case, the first, second, and third wireless frames can be jointly detected;

For the above three situations, step 306 may specifically include:

01) Extract the data corresponding to PBCH from the third radio frame;

02) Perform independent PBCH detection on the third wireless frame, if physical broadcast channel information is detected, end the current detection; otherwise, perform step 03);

It should be noted that, if the physical broadcast channel information is detected, it may be further determined that the first, second and third radio frames belong to different periods;

03) Perform joint PBCH detection on the second and third radio frames, and if physical broadcast channel information is detected, end the current detection; otherwise, perform step 04);

It should be noted that, when the joint PBCH detection is performed on the second and third radio frames, if physical broadcast channel information is detected, it can be further determined that the first radio frame is related to the second and third radio frames. The frames belong to different periods; if no physical broadcast channel information is detected, it can be further determined that the first to third radio frames all belong to the same period;

04) Performing joint detection on the first, second and third wireless frames, the joint detection specifically includes the following steps:

Referring to FIG. 6 , it is a schematic diagram of a scheme for performing PBCH detection on three radio frames according to an embodiment of the present invention. In the figure, the three long squares on the left represent three radio frame data respectively, and the length of each radio frame data is It is 10ms data, where the grid part represents the corresponding data for PBCH detection in the first 10ms data, the vertical line part represents the corresponding data for PBCH detection in the second 10ms data, and the horizontal line part represents the third The corresponding data used for PBCH detection in each 10ms data, and the two figures on the right indicate that the corresponding data used for PBCH detection in the three 10ms data is put into the 0th, 1st, 2nd, and part 1, 2, 3. With reference to Figure 3 and Figure 6, this step may specifically include:

i) Put the data corresponding to the PBCH extracted from the three wireless frames into the 0, 1, and 2 parts of the PBCH memory, set the rest to zero, and perform PBCH detection. If PBCH information is detected, end, otherwise execute step ii);

It should be noted that when the PBCH information is detected in this case, it can be known at the same time that the frame number of the wireless frame satisfies MOD(FN,4)=0;

ii) Put the extracted data corresponding to the PBCH into the first, second, and third parts of the PBCH memory, set the remaining parts to zero, and perform PBCH detection. If PBCH information is detected, then end, otherwise, perform step 307;

It should be noted that when the PBCH information is detected in this case, it can be known that the frame number of the wireless frame at this time satisfies MOD(FN,4)=1;

Step 307, collecting the fourth wireless frame data;

Step 308, performing PBCH detection on the first to fourth wireless frame data, and judging whether PBCH information is detected, if so, then end, otherwise execute step 309;

Since it is necessary to detect four 10ms data, there are the following four situations:

Case 1: The first to third wireless frames belong to the same cycle, the fourth wireless frame and the first three wireless frames belong to different cycles, that is, the first three 10ms data belong to the previous 40ms cycle, and the last 10ms data belongs to the next 40ms cycle ; In this case, the third 10ms data can be used as an input to independently perform the detection step described in the aforementioned step 302;

Case 2: The first and second wireless frames belong to the same period, the third and fourth wireless frames belong to the same period, but the first and second wireless frames do not belong to the same period as the third and fourth wireless frames, that is, the first two The 10ms data belongs to the previous 40ms cycle, and the last two 10ms data belong to the next 40ms cycle; in this case, the third and fourth wireless frames can be jointly detected; wherein, the steps for the joint detection of the two frames can refer to the aforementioned step 304 ;

Case 3: The first wireless frame belongs to the same period, the second to fourth wireless frames belong to the same period, the first wireless frame and the last three wireless frames belong to different periods, that is, the previous 10ms data belongs to the previous 40ms period, and the latter The three 10ms data belong to the latter 40ms cycle; in this case, the second, third, and fourth wireless frames can be jointly detected; wherein, the steps for the joint detection of the three frames can refer to the aforementioned step 306;

Case 4: The first to four wireless frames all belong to the same period, that is, the four 10ms data all belong to the same 40ms period; in this case, the first to fourth wireless frames can be jointly detected;

For the above four situations, step 308 may specifically include:

01) Extract the data corresponding to PBCH from the fourth radio frame;

02) Perform independent PBCH detection on the fourth wireless frame, if physical broadcast channel information is detected, end the current detection; otherwise, perform step 03);

It should be noted that, if the physical broadcast channel information is detected, it may be further determined that the first, second and third radio frames and the fourth radio frame belong to different periods;

03) Perform joint detection on the third and fourth wireless frames, and if the physical broadcast channel information is detected, end the current detection; otherwise, perform step 04);

It should be noted that, when performing joint detection on the third and fourth radio frames, if physical broadcast channel information is detected, it may be further determined that the third and fourth radio frames belong to the same cycle, and the third , the fourth radio frame and the first and second radio frames belong to different periods;

04) Perform joint detection on the second, third and fourth wireless frames, and if physical broadcast channel information is detected, end the current detection; otherwise, perform step 05);

It should be noted that, when performing joint detection on the second, third and fourth radio frames, if physical broadcast channel information is detected, it may be further determined that the second, third and fourth radio frames belong to the same period , and the second, third, and fourth radio frames belong to different periods from the first radio frame; if physical broadcast channel information is detected, it may be further determined that the first to fourth radio frames belong to the same period;

05) Perform joint detection on the first, second, third and fourth radio frames. The method for joint detection of the four frames is consistent with the existing detection method, and will not be described in detail. If the PBCH information is not detected, then step 309 is performed;

Step 309, collect another wireless frame (10ms data), and discard the first 10ms data in the old data to form a new 40ms data. The detection in step 308 is repeated. This process is repeated cyclically until the PBCH is detected. This step is consistent with the existing detection method and will not be repeated in detail.

It can be seen that by using the method provided by the embodiment of the present invention, when the data is less than 40ms, the required PBCH information can be obtained by placing the data in different positions of the PBCH Buffer for traversal analysis, and usually the PBCH information can be detected within 10ms , which greatly reduces the detection delay and provides guarantee for other business operations such as UE access and handover.

The embodiment of the present invention also provides a device for detecting a physical broadcast channel, see FIG. 7, which specifically includes:

A collection unit 701, configured to collect the first wireless frame data;

The detection unit 702 is configured to perform PBCH detection on the first wireless frame data, and end the current detection if physical broadcast channel information is detected.

If no physical broadcast channel information is detected through said first radio frame, then

The collection unit 701 is also used to collect the second wireless frame data;

The detection unit 702 is further configured to perform PBCH detection on the first and second radio frame data, and end the current detection if physical broadcast channel information is detected.

If no physical broadcast channel information is detected through said first and second radio frames, then

The collection unit 701 is also used to collect the third wireless frame data;

The detection unit 702 is further configured to perform PBCH detection on the first, second and third wireless frame data, and end the current detection if physical broadcast channel information is detected.

If no physical broadcast channel information is detected through the first, second and third radio frames, then

The collection unit 701 is also used to collect the fourth wireless frame data;

The detecting unit 702 is further configured to perform PBCH detection on the first to fourth wireless frame data, and end the current detection if physical broadcast channel information is detected.

The detection unit 702 includes:

A memory unit for storing data corresponding to the PBCH, where the memory unit includes part 0, part 1, part 2 and part 3;

A first data extraction subunit, configured to extract data corresponding to the PBCH from the first wireless frame data;

The first PBCH detection subunit is used to put the data corresponding to the extracted PBCH into the 0th part of the PBCH memory, set the remaining three parts to zero, and perform PBCH detection. If the physical broadcast channel information is detected, then end.

Wherein, the first PBCH detection subunit is also used to put the data corresponding to the extracted PBCH into the first part of the PBCH memory after the physical broadcast channel information is not detected in the 0th part, and put the remaining three parts Set zero to perform PBCH detection, if the physical broadcast channel information is detected, then end, otherwise, put the data corresponding to the extracted PBCH into the second part of the PBCH memory, set the remaining three parts to zero, and perform PBCH detection, If the physical broadcast channel information is detected, then end, otherwise, put the data corresponding to the extracted PBCH into the third part of the PBCH memory, set the remaining three parts to zero, and perform PBCH detection, if the physical broadcast channel information is detected , then end.

Wherein, the detection unit 702 may also include:

The second data extraction subunit is used to extract data corresponding to PBCH from the first wireless frame data and extract data corresponding to PBCH from the second wireless frame when the physical broadcast channel information cannot be detected;

The first PBCH subunit is also used to perform independent PBCH detection on the second radio frame, and if the physical broadcast channel information is detected, the current detection is ended;

The second PBCH detection subunit is used to perform independent PBCH detection on the second radio frame, and when no physical broadcast channel information is detected, perform joint detection on the first and second radio frames: Put the data corresponding to the extracted PBCH into the 0 and 1 parts of the PBCH memory, set the remaining two parts to zero, and perform PBCH detection. If the physical broadcast channel information is detected, then end, otherwise, the extracted PBCH Put the corresponding data into the first and second parts of the PBCH memory, set the remaining two parts to zero, and perform PBCH detection. If the physical broadcast channel information is detected, then end, otherwise perform the steps to convert the data corresponding to the extracted PBCH Put the second and third parts of the PBCH memory, set the other two parts to zero, and perform PBCH detection. If the physical broadcast channel information is detected, it will end.

Wherein, the detection unit 702 may also include:

The third data extraction subunit is used to extract the data corresponding to the PBCH from the first and second wireless frame data, and when the physical broadcast channel information cannot be detected, extract the data corresponding to the PBCH from the third wireless frame;

The first PBCH detection subunit is used to perform independent PBCH detection on the third wireless frame, and if the physical broadcast channel information is detected, the current detection is ended;

The second PBCH detection subunit is used to perform independent PBCH detection on the third radio frame, and perform joint PBCH detection on the second and third radio frames when the physical broadcast channel information cannot be detected , if the physical broadcast channel information is detected, the current detection is ended; otherwise, it is determined that the first to third radio frames all belong to the same period;

The third PBCH detection subunit is used to perform joint PBCH detection on the second and three radio frames and when the physical broadcast channel information cannot be detected, perform joint on the first, second and three radio frames PBCH detection: put the data corresponding to the extracted PBCH into the 0, 1, and 2 parts of the PBCH memory, set the remaining parts to zero, and perform PBCH detection. If the physical broadcast channel information is detected, then end, otherwise, Put the extracted data corresponding to the PBCH into the first, second, and third parts of the PBCH memory, set the remaining parts to zero, and perform PBCH detection. If the physical broadcast channel information is detected, then end.

Wherein, the detection unit 702 may also include:

The fourth data extraction subunit is used to perform joint PBCH detection on the first, second, and third radio frames, and when the physical broadcast channel information cannot be detected, extract the data corresponding to the PBCH from the fourth radio frame ;

The first PBCH detection subunit is used to perform independent PBCH detection on the fourth radio frame, and if the physical broadcast channel information is detected, the current detection is ended;

The second PBCH detection subunit is used to perform independent PBCH detection on the fourth radio frame, and when the physical broadcast channel information cannot be detected, perform joint detection on the third and fourth radio frames, if detected Physical broadcast channel information, then end the current detection;

The third PBCH detection subunit is configured to perform joint detection on the third and fourth radio frames, and perform joint detection on the second, third and fourth radio frames when the physical broadcast channel information cannot be detected, If the physical broadcast channel information is detected, the current detection is ended;

The fourth PBCH detection subunit is configured to perform joint detection on the second, third and fourth radio frames, and when no physical broadcast channel information is detected, perform the joint detection on the first, second, third and fourth radio frames Radio frames are jointly detected.

Applying the device provided by the embodiment of the present invention, when the data is less than 40 ms, the required PBCH information can be obtained by placing the data in different positions of the PBCH Buffer for traversal and analysis. Usually, the PBCH information can be detected within 10 ms, which is extremely It greatly reduces the detection delay and provides guarantee for other business operations such as UE access and handover.

As for the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and for related parts, please refer to the part of the description of the method embodiment.

It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is a relationship between these entities or operations. There is no such actual relationship or order between them. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elements inherent in such a process, method, article, or device. Without further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising said element.

Those of ordinary skill in the art can understand that all or part of the steps in the implementation of the above method can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium, referred to herein as Storage media, such as: ROM/RAM, disk, CD, etc.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present invention are included in the protection scope of the present invention.

Claims (16)

1. one kind is detected the Physical Broadcast Channel method, it is characterized in that, comprising:

Collect first wireless frame data;

Described first wireless frame data is carried out Physical Broadcast Channel PBCH detects, comprising: described first radio frames is carried out independently PBCH detection, specifically comprise:

I) distribute the PBCH internal memory, described internal memory comprises the 0th part, part 1, part 2 and the 3rd part;

Ii) from described first wireless frame data, extract the data of PBCH correspondence;

Iii) with step I i) described in the data of the PBCH correspondence that extracts put into the 0th part of PBCH internal memory, with its excess-three part zero setting, carry out PBCH and detect;

If detect Physical Broadcast Channel information, then finish current detection.

2. method according to claim 1 is characterized in that, if do not detect Physical Broadcast Channel information by described first radio frames, then described method also comprises:

Collect second wireless frame data;

Described first and second wireless frame data are carried out PBCH to be detected;

If detect Physical Broadcast Channel information, then finish current detection.

3. method according to claim 2 is characterized in that, if do not detect Physical Broadcast Channel information by described first and second radio frames, then described method also comprises:

Collect the 3rd wireless frame data;

Described first, second, and third wireless frame data carried out PBCH to be detected;

If detect Physical Broadcast Channel information, then finish current detection.

4. method according to claim 3 is characterized in that, if do not detect Physical Broadcast Channel information by described first, second, and third radio frames, then described method also comprises:

Collect the 4th wireless frame data;

Described first to fourth wireless frame data carried out PBCH to be detected;

If detect Physical Broadcast Channel information, then finish current detection.

5. according to any described method in the claim 1 to 4, it is characterized in that if do not detect Physical Broadcast Channel information, the step of described first wireless frame data being carried out the PBCH detection also comprises:

Iv) with step I i) described in the data of the PBCH correspondence that extracts put into the part 1 of PBCH internal memory, with its excess-three part zero setting, carry out PBCH and detect, if detect Physical Broadcast Channel information, then finish, otherwise execution in step v);

V) with step I i) described in the data of the PBCH correspondence that extracts put into the part 2 of PBCH internal memory, with its excess-three part zero setting, carry out PBCH and detect, if detect Physical Broadcast Channel information, then finish, otherwise execution in step vi);

Vi) with step I i) described in the data of the PBCH correspondence that extracts put into the 3rd part of PBCH internal memory, with its excess-three part zero setting, carry out PBCH and detect, if detect Physical Broadcast Channel information, then finish, otherwise collect the information of second wireless frame data.

6. method according to claim 2 is characterized in that, the step of described first and second wireless frame data being carried out the PBCH detection comprises:

01) from second radio frames, extracts the data of PBCH correspondence;

02) described second radio frames carried out independently PBCH detection, if detect Physical Broadcast Channel information, finish current detection; Otherwise, execution in step 03);

03) described first and second radio frames are carried out joint-detection, described joint-detection specifically may further comprise the steps:

I) data of the PBCH correspondence that will extract from two radio frames are put into the 0th, 1 part of PBCH internal memory, with all the other two parts zero setting, carry out PBCH and detect, if detect Physical Broadcast Channel information, then finish, otherwise execution in step ii);

Ii) the data of the described PBCH correspondence that extracts are put into the 1st, 2 parts of PBCH internal memory, with all the other two parts zero setting, carried out PBCH and detect, if detect Physical Broadcast Channel information, then finish, otherwise execution in step iii);

Iii) the data of the described PBCH correspondence that extracts are put into the 2nd, 3 parts of PBCH internal memory, with all the other two parts zero setting, carried out the PBCH detection, if detect Physical Broadcast Channel information, then finish, otherwise collect the information of the 3rd wireless frame data.

7. method according to claim 3 is characterized in that, the step of described first, second, and third wireless frame data being carried out the PBCH detection comprises:

01) from the 3rd radio frames, extracts the data of PBCH correspondence;

02) described the 3rd radio frames carried out independently PBCH detection, if detect Physical Broadcast Channel information, finish current detection; Otherwise, execution in step 03);

03) PBCH that described second and third radio frames is united detects, if detect Physical Broadcast Channel information, finishes current detection; Otherwise execution in step 04);

04) described first, second, and third radio frames carried out joint-detection, described joint-detection specifically may further comprise the steps:

I) data of the PBCH correspondence that will extract from three radio frames are put into the 0th, 1,2 parts of PBCH internal memory, with remainder zero setting, carry out PBCH and detect, if detect Physical Broadcast Channel information, then finish, otherwise execution in step ii);

Ii) the data of the PBCH correspondence that extracts are put into the 1st, 2,3 parts of PBCH internal memory, with remainder zero setting, carried out PBCH and detect, if detect Physical Broadcast Channel information, then finish, otherwise collect the information of the 4th wireless frame data.

8. method according to claim 4 is characterized in that, the step of described first to fourth wireless frame data being carried out the PBCH detection comprises:

01) from the 4th radio frames, extracts the data of PBCH correspondence;

02) described the 4th radio frames carried out independently PBCH detection, if detect Physical Broadcast Channel information, then finish current detection; Otherwise, execution in step 03);

03) described the 3rd, the 4th radio frames is carried out joint-detection, if detect Physical Broadcast Channel information, then finish current detection; Otherwise, execution in step 04);

04) described second, third carried out joint-detection with the 4th radio frames, if detect Physical Broadcast Channel information, then finish current detection; Otherwise, execution in step 05);

05) the described first, second, third and the 4th radio frames is carried out joint-detection.

9. one kind is detected the Physical Broadcast Channel device, it is characterized in that, comprising:

Collector unit is used for collecting first wireless frame data;

Detecting unit is used for that described first wireless frame data is carried out PBCH and detects, if detect Physical Broadcast Channel information, then finishes current detection, and described detecting unit comprises:

Internal storage location, for the data of storage PBCH correspondence, described internal storage location comprises the 0th part, part 1, part 2 and the 3rd part;

The first data extract subelement is for the data that extract the PBCH correspondence from described first wireless frame data;

The one PBCH detection sub-unit for the 0th part of the data of the described PBCH correspondence that extracts being put into the PBCH internal memory, with its excess-three part zero setting, is carried out PBCH and is detected, if detect Physical Broadcast Channel information, then finishes.

10. device according to claim 9 is characterized in that, if do not detect Physical Broadcast Channel information by described first radio frames, then

Described collector unit also is used for collecting second wireless frame data;

Described detecting unit is used for that also described first and second wireless frame data are carried out PBCH and detects, if detect Physical Broadcast Channel information, then finishes current detection.

11. device according to claim 10 is characterized in that, if do not detect Physical Broadcast Channel information by described first and second radio frames, then

Described collector unit also is used for collecting the 3rd wireless frame data;

Described detecting unit is used for that also described first, second, and third wireless frame data carried out PBCH and detects, if detect Physical Broadcast Channel information, then finishes current detection.

12. device according to claim 11 is characterized in that, if do not detect Physical Broadcast Channel information by described first, second, and third radio frames, then

Described collector unit also is used for collecting the 4th wireless frame data;

Described detecting unit is used for that also described first to fourth wireless frame data carried out PBCH and detects, if detect Physical Broadcast Channel information, then finishes current detection.

13. according to any described device of claim 9-12, it is characterized in that,

A described PBCH detection sub-unit, also be used for after the 0th part does not detect Physical Broadcast Channel information, the data of the described PBCH correspondence that extracts are put into the part 1 of PBCH internal memory, with its excess-three part zero setting, carrying out PBCH detects, if detect Physical Broadcast Channel information, then finish, otherwise, the data of the described PBCH correspondence that extracts are put into the part 2 of PBCH internal memory, with its excess-three part zero setting, carry out PBCH and detect, if detect Physical Broadcast Channel information, then finish, otherwise, the data of the described PBCH correspondence that extracts are put into the 3rd part of PBCH internal memory, with its excess-three part zero setting, carry out PBCH and detect, if detect Physical Broadcast Channel information, then finish.

14. device according to claim 13 is characterized in that, described detecting unit also comprises:

The second data extract subelement in the time of can't detecting Physical Broadcast Channel information for the data that extract the PBCH correspondence from described first wireless frame data, extracts the data of PBCH correspondence from second radio frames;

A described PBCH subelement, PBCH detects also to be used for carrying out independently to described second radio frames, if detect Physical Broadcast Channel information, then finishes current detection;

The 2nd PBCH detection sub-unit, PBCH detects to be used for carrying out independently to described second radio frames, and when not detecting Physical Broadcast Channel information, described first and second radio frames are carried out joint-detection: the data that will extract the PBCH correspondence from first radio frames and second radio frames are put into the 0th of PBCH internal memory, 1 part, with all the other two parts zero setting, carrying out PBCH detects, if detect Physical Broadcast Channel information, then finish, otherwise, the data of the described PBCH correspondence that extracts are put into the 1st of PBCH internal memory, 2 parts with all the other two parts zero setting, are carried out PBCH and are detected, if detect Physical Broadcast Channel information, then finish, otherwise execution in step is put into the 2nd of PBCH internal memory with the data of the described PBCH correspondence that extracts, 3 parts, with all the other two parts zero setting, carry out PBCH and detect, if detect Physical Broadcast Channel information, then finish.

15. device according to claim 14 is characterized in that, described detecting unit also comprises:

The 3rd data extract subelement in the time of can't detecting Physical Broadcast Channel information for the data that extract the PBCH correspondence from described first and second wireless frame data, extracts the data of PBCH correspondence from the 3rd radio frames;

A described PBCH detection sub-unit, PBCH detects to be used for carrying out independently to described the 3rd radio frames, if detect Physical Broadcast Channel information, then finishes current detection;

Described the 2nd PBCH detection sub-unit, PBCH detects to be used for carrying out independently to described the 3rd radio frames, and can't detect Physical Broadcast Channel information the time, the PBCH that described second and third radio frames is united detects, if detect Physical Broadcast Channel information, then finish current detection; Otherwise judge that described first to the 3rd radio frames all belongs to same one-period;

The 3rd PBCH detection sub-unit, be used for to described second, three PBCH detections that radio frames is united, and in the time of can't detecting Physical Broadcast Channel information, to described first, two, three PBCH detections that radio frames is united: will be from first radio frames, the data that extract the PBCH correspondence in the 3rd radio frames of second radio frames are put into the 0th of PBCH internal memory, 1,2 parts, with remainder zero setting, carrying out PBCH detects, if detect Physical Broadcast Channel information, then finish, otherwise, the data of the described PBCH correspondence that extracts are put into the 1st of PBCH internal memory, 2,3 parts, with remainder zero setting, carry out PBCH and detect, if detect Physical Broadcast Channel information, then finish.

16. device according to claim 15 is characterized in that, described detecting unit also comprises:

The 4th data extract subelement, the PBCH that is used for described first, second and third radio frames is united detects, and can't detect Physical Broadcast Channel information the time, extracts the data of PBCH correspondence from the 4th radio frames;

A described PBCH detection sub-unit, PBCH detects to be used for carrying out independently to described the 4th radio frames, if detect Physical Broadcast Channel information, then finishes current detection;

The 2nd PBCH detection sub-unit, PBCH detects to be used for carrying out independently to described the 4th radio frames, and can't detect Physical Broadcast Channel information the time, described the 3rd, the 4th radio frames is carried out joint-detection, if detect Physical Broadcast Channel information, then finish current detection;

The 3rd PBCH detection sub-unit, be used for described the 3rd, the 4th radio frames is carried out joint-detection, and can't detect Physical Broadcast Channel information the time, described second, third and the 4th radio frames are carried out joint-detection, if detect Physical Broadcast Channel information, then finish current detection;

The 4th PBCH detection sub-unit is used for described second, third and the 4th radio frames are carried out joint-detection, and when not detecting Physical Broadcast Channel information, the described first, second, third and the 4th radio frames is carried out joint-detection.

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