WO2017032230A1

WO2017032230A1 - High-frequency synchronization implementation method, system, and apparatus based on wide and narrow beam access

Info

Publication number: WO2017032230A1
Application number: PCT/CN2016/094959
Authority: WO
Inventors: 谢赛锦; 刘文豪; 毕峰
Original assignee: 中兴通讯股份有限公司
Priority date: 2015-08-27
Filing date: 2016-08-12
Publication date: 2017-03-02
Also published as: CN106487437B; CN106487437A

Abstract

A high-frequency synchronization implementation method based on wide and narrow beam access, comprising: a transmitting end sends a wide beam bearing a primary synchronization sequence at a primary synchronization transmitting time point; a receiving end detects a cell intra-group ID and a wide beam ID after receiving the wide beam; the transmitting end sends a narrow beam bearing a secondary synchronization sequence at a secondary synchronization transmitting time point; the receiving end detects a cell group ID and a narrow beam ID when receiving the narrow beam within the covering area of the detected wide beam ID; and the receiving end determines a cell ID according to the detected cell intra-group ID and the detected cell group ID, and feeds back the detected wide beam ID and the detected narrow beam ID to the transmitting end. By means of the technical solution, beam training is implemented, and cell search is completed, thereby reducing the time consumption of beam search.

Description

Method, system and device for realizing high frequency synchronization based on wide and narrow beam access

Technical field

The present application relates to, but is not limited to, the fifth generation mobile communication (5G) millimeter wave technology, especially a high frequency synchronization implementation method, system and device based on wide and narrow beam access in high frequency communication.

Background technique

People have more and more demand for wireless communication, and the requirements for user experience are also increasing, such as low latency, high throughput, etc., which puts higher and higher requirements on communication technology. According to Shannon's theorem: to increase communication capacity, you can increase the bandwidth.

High frequency (hereinafter referred to as high frequency) has a lot of idle spectrum to be developed, and the bandwidth is up to 0.9 GHz or more, which is more than 200 times that of the spectrum below 3 GHz. The main features of high frequency are directionality, large bandwidth, but high attenuation. In order to combat severe path loss, directional antennas are usually used at the transmitting end and the receiving end to obtain high antenna gain. The high frequency wireless network is capable of supporting giga data rates through directional communication of narrow beams. However, current high frequency communication standards are hampered by two problems: one is that the transmit beam and the receive beam are not aligned, and the other is the time consumption problem of the beam search.

Before high frequency communication begins, the device needs to align its beam pointing angles with each other. Therefore, an efficient search protocol is needed to obtain the best beam angle pair. This search protocol is called beamforming training protocol. The specific implementation generally includes: first, transmitting a training signal from the transmitting end, and the receiving end must simultaneously adjust the azimuth and elevation to search for the strongest signal; then, the receiving end should be fixed to the strongest link direction, when the transmitting direction When the receiving position changes, beam training needs to be repeated. Thus, the time spent on beam search will be longer, so there is a need to reduce the search time. Currently, hierarchical search can reduce search time. The phased search includes: first, the transmitting end emits a beam with a wide coverage, referred to as a wide beam, and the receiving end searches for the wide beam direction; then, the transmitting end emits within the wide beam range recognized by the receiving end, and then sends out A beam with a small coverage area, referred to as a narrow beam. Thus, after the two beam searches are completed at the receiving end, the optimal beam direction is determined. The wide beam refers to a beam with a larger half-power beam width (HPBW); the narrow beam refers to a beam with a smaller HPBW. Which specific beams belong to the larger beam of HPBW, and which beams belong to the smaller beam of HPBW, The foregoing is not intended to be exhaustive, and its specific definition is not intended to limit the scope of the application.

In addition, for high-frequency cellular communication, since the coverage of the high-frequency carrier is limited, it is necessary to increase the number of cell sites in order to increase the communication capacity. The terminal (or UE) also performs time-frequency synchronization, cell identification (hereinafter referred to as cell identification (ID)), or cell handover before establishing communication with the high-frequency station. For cell search, in order to reduce the complexity of the receiving end, at present, the Long Term Evolution (LTE) synchronization channel is a two-stage structure: the first one is a primary synchronization channel (P-SCH) that transmits a primary synchronization signal, which is mainly used to obtain time. The estimation of the synchronization and the coarse frequency offset and the identification of the ID in the cell group, the P-SCH transmits the primary synchronization sequence (PSS), and the other is the secondary synchronization channel (S-SCH), which is used to carry the cell ID or the cell group ID. For high-frequency cellular systems, due to the deployment of dense cells, the number of cell IDs that the terminal needs to identify is more, about several times that of the LTE system.

In summary, high-frequency cellular communication requires both beam training and cell search. Moreover, the implementation of separating downlink synchronization and beam training makes the implementation steps cumbersome and increases the delay.

Summary of the invention

The following is an overview of the topics detailed in this document. This Summary is not intended to limit the scope of the claims.

Embodiments of the present invention provide a high-frequency synchronization implementation method, system, and apparatus based on wide-narrow beam access, which can complete cell search while beam training, thereby reducing time consumption of beam search.

The embodiment of the invention provides a high frequency synchronization implementation method based on wide and narrow beam access, comprising:

The transmitting end sends a wide beam carrying a primary synchronization sequence at the time of the primary synchronization transmission;

The transmitting end emits a narrow beam carrying a secondary synchronization sequence at the time of the secondary synchronization transmission.

Optionally, the primary synchronization sequence is a constant envelope zero autocorrelation (CAZAC) sequence, or a longest linear shift register m sequence, or a Golay sequence; the primary synchronization sequence identifies an ID and a width within a cell group. Beam ID.

Optionally, the secondary synchronization sequence identifies a cell group ID and a narrow beam ID.

Optionally, the narrow beam included in each sector adopts one or a group of synchronization or orthogonal A Walsh sequence identifies the cell group ID and the narrow beam ID.

Optionally, all the narrow beams use the same Walsh sequence to mark the cell group ID, and after different narrow beams, additional information indicates the narrow beam ID;

Alternatively, the narrow beam included in the same wide beam adopts different Walsh sequences, but each wide beam contains the same Walsh sequence, and the cell group IDs indicated by these Walsh sequences are the same.

Optionally, the direction of the narrow beam is transmitted by using additional information; or, different sequence identifiers are used.

The embodiment of the invention further provides a high frequency synchronization implementation method based on wide and narrow beam access, comprising:

After receiving the wide beam, the receiving end detects the intra-cell ID and the wide beam ID;

After receiving the narrow beam in the coverage area of the detected wide beam ID, the receiving end detects the cell group ID and the narrow beam ID;

The receiving end determines the cell ID according to the detected intra-cell ID and the cell group ID, and feeds back the detected wide beam ID and the narrow beam ID to the transmitting end.

Optionally, the receiving end detecting the intra-cell ID and the wide beam ID includes:

Receiving, by the receiving end, a wide beam, and performing correlation processing on the primary synchronization sequence stored locally by the receiving end; when the peak value of the correlation processing exceeds a preset first threshold, detecting a transmission sequence and obtaining the cell Intra-group ID and wide beam ID.

Optionally, the receiving end detecting the cell group ID and the narrow beam ID includes:

Receiving, by the receiving end, a plurality of narrow beams in a coverage area of the detected wide beam ID;

Selecting the one with the highest power and performing correlation processing on the locally saved secondary synchronization sequence, and identifying the cell group ID and the narrow beam when the peak value of the correlation processing exceeds a preset second threshold. ID.

Optionally, if the peak of the result does not exceed the second threshold, the method further includes:

Receiving, by the receiving end, the one with the highest power from the other narrow beams received, and performing correlation processing on the locally saved secondary synchronization sequence, when the peak value of the correlation result exceeds the When the second threshold is set in advance, the cell group ID and the narrow beam ID are identified.

The transmitting end sends a wide beam carrying the primary synchronization sequence at the time of the primary synchronous transmission; after receiving the wide beam, the receiving end detects the ID of the cell group and the wide beam ID;

The transmitting end sends a narrow beam carrying the secondary synchronization sequence at the time of the secondary synchronization transmission; the receiving end detects the cell group ID and the narrow beam ID after receiving the narrow beam in the coverage area of the detected wide beam ID;

The receiving end determines the cell ID according to the detected intra-cell ID and cell group ID, and feeds back the detected wide beam ID and narrow beam ID to the transmitting end.

Optionally, the primary synchronization sequence is a constant envelope zero autocorrelation (CAZAC) sequence, or a longest linear shift register m sequence, or a Golay sequence; the primary synchronization sequence identifies the intra-cell ID And the wide beam ID.

Optionally, the secondary synchronization sequence identifies the cell group ID and the narrow beam ID.

Optionally, the narrow beam included in each sector identifies the cell group ID and the narrow beam ID with one or a set of synchronous or orthogonal Walsh sequences.

Or, the narrow beam included in the same wide beam adopts different Walsh sequences, but each wide beam includes the same Walsh sequence, and the cell group IDs indicated by the Walsh sequences are the same.

Receiving, by the receiving end, the one with the highest power from the other narrow beams received, and performing related processing on the locally saved secondary synchronization sequence, when the peak of the correlation result exceeds the preset second At the threshold, the cell group ID and the narrow beam ID are identified.

The embodiment of the invention further provides a high frequency synchronization implementation system based on wide and narrow beam access, comprising a transmitting end and a receiving end; wherein

The transmitting end is configured to send a wide beam carrying the primary synchronization sequence at the time of the primary synchronization transmission; and to emit a narrow beam carrying the secondary synchronization sequence at the time of the secondary synchronization transmission;

The receiving end is configured to detect the intra-cell ID and the wide beam ID after receiving the wide beam; after receiving the narrow beam in the coverage area of the detected wide beam ID, detecting the cell group ID and the narrow beam ID; The detected intra-cell ID and cell group ID determine the cell ID, and feed back the detected wide beam ID and narrow beam ID to the transmitting end.

Optionally, the transmitting end includes at least a control module, a transmitting module, and a receiving module;

The control module is configured to send a notification of a primary synchronization transmission time or a secondary synchronization transmission time to the transmitting module according to a preset transmission mode;

The transmitting module is configured to: when receiving the primary synchronization transmission time notification, issue a wide beam carrying the primary synchronization sequence; and receive a secondary synchronization transmission time notification, and send a narrow beam carrying the secondary synchronization sequence;

The receiving module is configured to receive the detected wide beam ID and the narrow beam ID fed back from the receiving end.

Optionally, the receiving end includes at least a processing module, and a feedback module;

The processing module is configured to: after receiving the wide beam, detect the intra-cell ID and the wide beam ID; After receiving the narrow beam in the coverage area of the detected wide beam ID, detecting the cell group ID and the narrow beam ID; determining the cell ID according to the detected intra-cell ID and the cell group ID;

The feedback module is configured to feed back the detected wide beam ID and the narrow beam ID to the transmitting end.

Optionally, the processing module is configured to: receive a wide beam sent by a high frequency, and perform correlation processing with the saved primary synchronization sequence; when the peak of the correlation result exceeds a preset first threshold, detect a transmission sequence and Obtaining the intra-group ID and the wide beam ID; and receiving a plurality of narrow beams in the coverage area of the detected wide beam ID, selecting one of the most powerful ones, and performing correlation processing with the saved secondary synchronization sequence And when the peak of the correlation result exceeds a preset second threshold, the cell group ID and the narrow beam ID are identified.

Optionally, the processing module is further configured to: if the peak of the correlation result does not exceed the second threshold, select the one with the highest power from the remaining remaining narrow beams, and use the save The secondary synchronization sequence is associated with the processing, and when the peak of the correlation result exceeds the second threshold, the cell group ID and the narrow beam ID are identified.

Optionally, the primary synchronization sequence may be a CAZAC sequence, or a longest linear shift register m sequence, or a Golay sequence; the primary synchronization sequence identifies the intra-cell group ID and the wide beam ID.

Optionally, the secondary synchronization sequence identifies the cell group ID and the narrow beam ID;

The narrow beam included in each sector uses one or a set of Walsh sequences to identify the cell group ID and the narrow beam ID.

Optionally, the direction of the narrow beam is transmitted by using additional information; or, different Walsh sequence identifiers are used.

Optionally, the transmitting end is a high frequency station; and the receiving end is a terminal UE.

The embodiment of the invention further provides a high frequency station, comprising at least a control module, a transmitting module and Receiving module; wherein

Optionally, the primary synchronization sequence may be a CAZAC sequence, or a longest linear shift register m sequence, or a Golay sequence;

The primary synchronization sequence identifies the intra-cell ID and the wide beam ID.

Optionally, the secondary synchronization sequence identifies a cell group ID and a narrow beam ID;

Optionally, all of the narrow beams use the same one or a set of Walsh sequences to identify the cell group ID.

An embodiment of the present invention further provides a UE, including at least a processing module, and a feedback module, where

The processing module is configured to: after receiving the wide beam, detecting the intra-cell ID and the wide beam ID; after receiving the narrow beam in the coverage area of the detected wide beam ID, detecting the cell group ID and the narrow wave a bundle ID; determining a cell ID according to the detected intra-cell ID and cell group ID;

Optionally, the processing module is configured to: receive a wide beam sent by a high frequency, and perform correlation processing with the saved primary synchronization sequence; when the peak of the correlation result exceeds a preset first threshold, detect a transmission sequence and Obtaining the intra-group ID and the wide beam ID; and receiving a plurality of narrow beams in the coverage area of the detected wide beam ID, selecting one of the most powerful ones, and performing the saved secondary synchronization sequence with the same Correlation processing, when the peak of the correlation result exceeds a preset second threshold, the cell group ID and the narrow beam ID are identified.

The embodiment of the present invention further provides a computer readable storage medium storing computer executable instructions, and when the computer executable instructions are executed, implementing the high-frequency synchronization implementation method based on wide and narrow beam access applied to a transmitting end.

An embodiment of the present invention further provides a computer readable storage medium storing computer executable instructions, when the computer executable instructions are executed, implementing the wide and narrow beam applied to a receiving end High-frequency synchronization implementation of access.

Compared with the related art, the technical solution of the present application includes: a transmitting end sends a wide beam carrying a primary synchronization sequence at a primary synchronous transmission time; and after receiving a wide beam, the receiving end detects a community group ID and a wide beam ID; At the time of the secondary synchronous transmission, the terminal sends a narrow beam carrying the secondary synchronization sequence; after receiving the narrow beam in the coverage area of the detected wide beam ID, the receiving end detects the cell group ID and the narrow beam ID; the receiving end detects according to the detection The out-of-cell group ID and the cell group ID determine the cell ID, and feed back the detected wide beam ID and narrow beam ID to the transmitting end. With the technical solution provided by the embodiment of the present invention, cell search is completed while beam training is performed, thereby reducing the time consumption of the beam search.

In the embodiment of the present invention, a well-correlated sequence, such as a CAZAC sequence, or an m-sequence, or a Golay sequence, a Walsh sequence, etc., is used as a beam training sequence to mark cell ID information and beam direction, and the beam training is well realized. A cell search is also completed.

Other features and advantages of the present application will be set forth in the description which follows. The objectives and other advantages of the present invention can be realized and obtained by the structure of the invention.

BRIEF abstract

The drawings described herein are intended to provide a further understanding of the present application, and are intended to be a part of this application. In the drawing:

Figure 1 is a schematic diagram of two beams supported by a high frequency station;

2 is a flowchart of a method for implementing high frequency synchronization based on wide and narrow beam access according to an embodiment of the present invention;

3 is a schematic diagram of a first embodiment of a high frequency station transmit beam and synchronization sequence of the present application;

4 is a schematic flow chart of an embodiment of a high frequency station and a UE implementing high frequency synchronization according to the present application;

5 is a schematic diagram of a wide beam transmitted by a high frequency base station and a wide beam received by a UE in a wide beam transmission phase in the first embodiment of the present application;

6 is a schematic diagram of a narrow beam transmitted by a high frequency base station and a narrow beam received by a UE in a narrow beam search phase in the first embodiment of the present application;

7 is a schematic diagram of a second embodiment of a high frequency station transmit beam and synchronization sequence of the present application;

FIG. 8 is a schematic diagram of a wide beam transmitted by a high frequency base station and a wide beam received by a UE in a wide beam transmission phase in the second embodiment of the present application.

FIG. 9 is a timing diagram of time-divisionally transmitting a narrow beam at a high frequency station according to a second embodiment of the present application; FIG.

10 is a schematic diagram of a third embodiment of a high frequency station transmit beam and synchronization sequence of the present application;

FIG. 11 is a schematic structural diagram of a high frequency synchronization implementation system based on wide and narrow beam access according to an embodiment of the present invention.

Embodiments of the invention

The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments in the present application may be arbitrarily combined with each other.

Figure 1 is a schematic diagram of two types of beams supported by a high-frequency station. As shown in Figure 1, the left picture shows the high-beam site wide beam emission, and the right picture shows the high-frequency station narrow beam transmission. FIG. 2 is a flowchart of a method for implementing high frequency synchronization based on wide and narrow beam access according to an embodiment of the present invention. As shown in FIG. 2, the method in this embodiment includes the following steps:

Step 200: The transmitting end sends a wide beam carrying the primary synchronization sequence at the time of the primary synchronization transmission; after receiving the wide beam, the receiving end detects the intra-cell ID and the wide beam ID.

Among them, the wide beam refers to a beam with a larger HPBW. The definition of the wide beam is not intended to limit the scope of protection of the present application, and will not be described again here.

The primary synchronization sequence also identifies the wide beam ID while identifying the ID in the cell group. The intra-cell ID is also called the sector ID, and its value also indicates the sector direction information; the wide beam ID is also called the wide beam index, and its value also indicates the beam direction. The primary synchronization sequence may be a Constant Amplitude Zero Auto Correlation (CAZAC) sequence, or a longest linear shift register (m) sequence, or a Golay sequence.

The transmitting end may be a high frequency station, and the receiving end may be a UE.

The receiving end detecting the intra-group ID and the wide beam ID in the step include:

The receiving end receives the wide beam and uses the main synchronization sequence stored locally at the receiving end to correlate with it. Processing, when the peak of the result of the correlation processing exceeds the preset first threshold T1, the transmission sequence is detected and the intra-cell ID and the wide beam ID are obtained.

The primary synchronization sequence stored locally at the receiving end refers to a locally stored signal sequence for performing correlation processing with the received signal. In the primary synchronization phase, all primary synchronization sequences are locally saved.

The receiving end may adopt multiple wide beam omnidirectional or quasi-omnidirectional reception in the sector level scanning or the intra-cell ID detection phase.

It is assumed that the receiving end is directionally received, and the receiving end has its own reception in the direction of m (refer to the number of wide beams received). The receiving end calculates the power of the m received signals, selects the maximum received signal power, and performs correlation processing with the main synchronization sequence stored locally at the receiving end. If the peak value exceeds the preset first threshold T1, the intra-cell ID and the wide beam ID can be determined.

The setting of the first threshold T1 is related to the noise, and is also related to the preset false alarm probability. The specific technical means that are applicable to those skilled in the art are not limited to the scope of protection of the present application, and details are not described herein again.

It should be noted that if there is more than one maximum value, one of them may be randomly selected (or according to the UE receiving beam number size), and if the correlation value exceeds the preset first threshold T1, the intra-cell ID and the cell group may be detected. Wide beam ID; otherwise, if its correlation value does not exceed the preset first threshold T1, and then select one from the remaining maximum values, repeat the above process until it is determined that the correlation value of the selected maximum value exceeds the preset value. The first threshold is T1. If all the maximum values are tried and no peak is detected, then the largest one is selected from the remaining reception results, and the above process is repeated until the intra-cell ID and the wide beam ID are detected. If all the reception results are tried and the intra-cell ID and the wide beam ID cannot be detected, it is determined that the detection fails and ends.

Step 201: The transmitting end sends a narrow beam carrying the secondary synchronization sequence at the time of the secondary synchronization transmission. After receiving the narrow beam in the coverage area of the detected wide beam ID, the receiving end detects the cell group ID and the narrow beam ID.

Among them, the narrow beam refers to a beam with a smaller HPBW. The definition of the narrow beam is not intended to limit the scope of protection of the present application, and is not described herein again.

The secondary synchronization sequence identifies the cell group ID and the narrow beam ID, which is also referred to as a narrow beam index. The narrow beam included in each sector uses one or a set of synchronous or orthogonal (Walsh) sequences to identify the cell group ID and the narrow beam ID. Since a wide beam contains multiple narrow beams, the narrow beam ID is also identified. The method for identifying the narrow beam ID in the embodiment of the present invention is: all narrow beams use the same Walsh sequence to mark the cell group ID, and only need to add information after the different narrow beams to indicate the narrow beam ID; or, the same width The narrow beams included in the beam use different Walsh sequences, but each wide beam contains the same Walsh sequence, and the cell group IDs indicated by these Walsh sequences are also the same.

The narrow beam direction can be transmitted with additional information or with different sequence identification.

In this step, after receiving the wide beam ID, the receiving end receives the narrow beam only in the coverage area of the detected wide beam ID, that is, the sector ID. The receiving end detects the cell group ID and the narrow beam ID in this step. :

The receiving end receives a plurality of narrow beams in the coverage area of the detected wide beam ID; selects the one with the highest power, and performs correlation processing with the secondary synchronization sequence locally saved by the receiving end, when the result of the correlation processing When the peak value exceeds the preset second threshold T2, the cell group ID and the narrow beam ID can be identified.

The setting of the second threshold T2 is related to the noise, and is also related to the preset false alarm probability. The specific implementation is not limited to the scope of protection of the present application, and details are not described herein again.

The secondary synchronization sequence stored locally at the receiving end refers to a locally stored signal sequence for correlating with the received signal, and in the secondary synchronization phase, all the secondary synchronization sequences stored locally.

Optionally, if the peak value of the correlation result does not exceed the preset threshold, then the one with the largest power is selected from the remaining other narrow beams received, and the secondary synchronization sequence is used to perform correlation processing on the correlation result. When the peak value exceeds the preset second threshold T2, the cell group ID and the narrow beam ID can be identified; if the peak value has not exceeded the preset threshold, the above processing is repeated until the cell group ID and the narrow beam ID are detected. This test fails if the pre-set threshold is not exceeded after the last received narrow beam is processed.

In the method of the embodiment of the present invention, the transmitting end transmits the wide beam and the narrow beam in a predetermined preset period, where the wide beam carries the intra-cell ID and the narrow beam carries the cell group ID.

Step 202: The receiving end determines the cell ID according to the detected intra-cell ID and the cell group ID, and feeds back the detected wide beam ID and the narrow beam ID to the transmitting end, so that the transmitting end uses the scheduling.

In the foregoing method of the embodiment of the present invention, after the intra-cell ID and the cell group ID are detected, the method for referring to the LTE cell hierarchical search is taken as an example, and the cell to be searched is divided into several groups, and each group includes A few (sectors) group ID, then cell ID = m * Gn + n. Where m is the number of total intra-group IDs included in a group, such as m=6; Gn represents the cell group ID, and n represents the intra-cell ID.

Assuming that the transmitting end is a high frequency station and the receiving end is a UE, then the high frequency station simultaneously transmits m wide beams at the time of the primary synchronous transmission, and the sequences carried by the m wide beams have good autocorrelation and cross correlation. Orthogonal sequences, such as CAZAC sequences, or Golay sequences, or m-sequences, identify different sectors (ie, intra-group IDs) and beam directions, respectively. For example, as shown in Figure 1, S0 ((330 ° ~ 360 °) U (0 ~ 30 °)) corresponds to ZC0, flag sector 0; S1 (30 ° ~ 90 °) corresponds to ZC1, flag sector 1; S2 (90°～150°) corresponds to ZC2, flag sector 2; S3 (150°~210°) corresponds to ZC3, flag sector 3; S4 (210°~270°) corresponds to ZC4, flag sector 4; S5(270 °~330°) corresponds to ZC5, marking sector 5.

The high-frequency station uses the narrow-beam to identify the group number Gn of the cell at the time of the secondary synchronization transmission. In the embodiment of the present invention, the Walsh sequence is used as the secondary synchronization sequence to identify the cell group ID. At the same time, in order to identify the narrow beam ID and identify the fine beam direction, in the method of the embodiment of the present invention, information may be added after the secondary synchronization sequence to indicate the narrow beam ID; or several narrow beams in the sector may be different. The sequence marks the beams within the sector, and they mark the same cell group, ie the same cell group ID.

The method of the embodiment of the present invention is described in detail below with reference to specific embodiments.

3 is a schematic diagram of a first embodiment of a high frequency station transmit beam and a synchronization sequence according to the present application. As shown in FIG. 3, the high frequency station simultaneously transmits all the wide beams at the time of the primary synchronous transmission, and at the time of the secondary synchronous transmission. All narrow beams are emitted simultaneously. The primary synchronous transmission and the secondary synchronous transmission have a certain timing relationship, and both the primary synchronous transmission and the secondary synchronous transmission are periodically transmitted.

4 is a schematic flowchart of an embodiment of a high-frequency station and a UE that implements high-frequency synchronization according to the present application. As shown in FIG. 4, the implementation of this embodiment includes:

Step 1: The high frequency station (mmWBS) transmits a wide beam carrying a primary synchronization sequence (PSS), The UE receives the wide beam for sector level beam search while completing sector search and intra-cell ID identification and frame timing.

As shown in FIG. 4, the high frequency station simultaneously transmits m wide beams at the time of the primary synchronous transmission. In the first embodiment, it is assumed that the sequences carried by the m wide beams are Zadoff-Chu sequences, respectively, and different identifiers are respectively identified. Sector (intra-cell ID) and beam direction (or sector ID). For example, as shown in FIG. 5, FIG. 5 is a schematic diagram of a wide beam transmitting phase, a wide beam transmitted by a high frequency base station, and a wide beam received by a UE in a wide beam transmitting phase according to the first embodiment of the present application, where S0 ((330° to 360°) U (0 ~ 30 °)) corresponds to ZC0, flag sector 0; S1 (30 ° ~ 90 °) corresponds to ZC1, flag sector 1; S2 (90 ° ~ 150 °) corresponds to ZC2, flag sector 2; S3 (150 ° ~ 210 °) corresponds to ZC3, flag sector 3; S4 (210 ° ~ 270 °) corresponds to ZC4, flag sector 4; S5 (270 ° ~ 330 °) corresponds to ZC5, flag sector 5.

Accordingly, as shown in FIG. 4, the UE performs reception in different directions with a plurality of wide beams. In the first embodiment, it is assumed that the received six received signals are recorded as y ₀ , y ₁ , . . . , y _{5 .} . Also, in the first embodiment, it is assumed that the received signal y ₃ of the beam S3 of the UE works best (i.e., the received power is the largest), or that the signal received from the millimeter wave base station by the UE using the beam S3 is the best. Then, the UE uses the locally saved primary synchronization sequence, that is, the Zadoff-Chu sequence that identifies 6 sectors: ZC0, ZC1, ZC2, ZC3, ZC4, and ZC5 are correlated with the received best signal, if the correlation value exceeds a certain value. The pre-set threshold, then the sector corresponding to the sequence is the serving sector of the UE, whereby the intra-group ID can be detected. At the same time, the UE also knows the rough launch angle. It should be noted that, if the frame structure information is also known to the frame timing information, the embodiment of the present invention does not involve the design of the frame structure, and therefore is not described herein again.

Step 2: The high frequency station transmits a narrow beam carrying a secondary synchronization sequence (SSS), and the UE performs narrow beam search (or fine beam training) to complete cell group ID identification, accurate time frequency synchronization, and cell ID detection. The millimeter wave base station can simultaneously transmit multiple narrow beams at the time of the secondary synchronous transmission and ensure coverage in all directions. The narrow beam carries the cell group ID. Optionally, the Walsh sequence is used to identify the cell group ID.

In order to identify the narrow beam, the embodiment of the present invention may alternatively have two methods. One method is: when transmitting a narrow beam, the base station adds a "symbol" to each Walsh sequence to identify the narrow beam. 6 is a low-beam search stage in the first embodiment of the present application, where a high-frequency base station transmits A schematic diagram of a narrow beam that is transmitted and a narrow beam received by the UE, as shown in FIG. 6, if there are three narrow beams in the wide beam, the direction of the indication from the low degree can be marked by "00", "01", and "10". A narrow beam to a height number is represented by one QPSK symbol. For example, if three narrow beams in the wide beam S1 are respectively recorded as b0, b1, and b2, 00 represents 30° to 50° ( The narrow beam of b0), 01 represents a narrow beam of 50° to 70° (b1), and 11 represents a narrow beam of 70° to 90° (b2). Another method is: a narrow beam belonging to the same wide beam adopts different Walsh sequences, and still has three narrow beams in a wide beam as an example, the sequence needs to be H0, H1, H2, and the three sequences are identified. The cell group ID is the same. It is not difficult to see that the above second method of identifying a narrow beam requires three times the number of Walsh sequences of the first method.

After the intra-cell ID and the cell group ID are detected (the cell ID is obtained at this time), the detailed beam direction is also identified. Still taking the effect of the received signal y ₃ of the beam S3 of the UE in step 1 as an example, at the UE, only the range of the narrow beam included in the beam S3 searched in step 1 needs to be searched, assuming that the reception is respectively y ₀ , y ₁ , y ₂ find out that the signal receiving intensity is the largest, assuming y ₁ . Then, the y ₁ is correlated by using the secondary synchronization sequence saved locally by the UE, and the cell group ID corresponding to the threshold is the cell group ID corresponding to the Walsh sequence.

Here, if the base station transmits a narrow beam, one "symbol" is appended to each Walsh sequence to identify the narrow beam, then the UE demodulates one symbol following the identification sequence Walsh sequence. In this case, If the result of the demodulation is "01", it can be determined that the UE receiving the base station transmits the narrow beam to the direction of 0 (the narrow beam b1 in S0).

If the narrow beams belonging to the same wide beam adopt different Walsh sequences, the UE uses the locally saved secondary synchronization sequence to perform correlation processing with the received signal, and the cell group ID and the beam number of the corresponding sequence identifier whose peak exceeds the threshold are detected. result.

In this way, the UE can feed back the result of the beam training (ie, the wide beam number and the narrow beam number) to the base station through the uplink channel, and the base station can refer to the information to perform UE-specific information such as directional transmission service for the UE.

FIG. 7 is a schematic diagram of a second embodiment of a high-frequency station transmit beam and a synchronization sequence. As shown in FIG. 7, a wide beam carrying a primary synchronization sequence is transmitted according to a certain period, that is, a wide beam is transmitted in m time periods respectively. . The narrow beam carrying the secondary synchronization is also transmitted at its corresponding time. The rounding here refers to the narrow beam rotation of the wide beam, that is, the certain beam is transmitted at a certain time. Narrow beam.

FIG. 8 is a timing diagram of a time-divisionally transmitting a narrow beam at a high frequency station according to a second embodiment of the present application. As shown in FIG. 8, the high frequency station transmits a wide beam S0 at time t0 (the first wide beam transmission time). The wide beam S1 is transmitted at time t1, ..., and the wide beam S5 is transmitted at time t5.

The UE uses multiple wide beam omnidirectional reception. And at each moment, the UE attempts primary synchronization detection until it detects an out of threshold value, determines the relatively optimal or optimal wide beam transmission direction, and also detects the intra-cell ID. In implementation, all signals in the wide beam transmission period may also be received, and the primary synchronization sequence stored locally by the UE is subjected to sliding correlation processing, and the sequence in which the peak value exceeds the threshold is the primary synchronization sequence.

FIG. 9 is a timing diagram of a time-divisionally transmitting a narrow beam at a high frequency station according to a second embodiment of the present application. As shown in FIG. 9, the base station sends a plurality of narrow beams each time at a secondary synchronous transmission time (a narrow beam included in the wide beam) ). The UE performs trial reception using only the beam shown in FIG. 6 (ie, only in the determined optimal direction), and detects the secondary synchronization sequence identification cell group ID and beam direction in the same manner as the first embodiment. Thus, the UE attempts to receive a narrow beam within the best wide beam range it finds, detects the cell group ID, and identifies the narrow beam direction.

10 is a schematic diagram of a third embodiment of a high-frequency station transmit beam and a synchronization sequence according to the present application. As shown in FIG. 10, the high-frequency station emits a wide beam in accordance with the timing at the time of transmitting the primary synchronization signal, and then in the secondary synchronization signal. At the time of transmission, a narrow beam is transmitted in turn. Wherein, the primary synchronization signal and the secondary synchronization signal are both periodically transmitted. In the third embodiment, still taking FIG. 8 as an example, first, the high frequency station transmits the wide beam S0 at time t0 (the first wide beam transmission time), and transmits the wide beam S1 at time t1, ..., and transmits at time t5. Wide beam S5. The UE attempts to detect the wide beam and identify the ID in the cell group within a certain period. The whole process is the same as that of the second embodiment, and the search of the ID in the cell group and the rough beam direction is completed.

Then, the high frequency station centrally transmits the secondary synchronization at the time of the narrow beam transmission. As shown in FIG. 9, the UE attempts to detect the narrow beam and identify the cell group ID in a certain period, and the implementation process is the same as that in the first embodiment. I won't go into details here.

It should be emphasized that, unlike the second embodiment, the primary synchronization and the secondary synchronization in the third embodiment are separately transmitted, the primary synchronization is concentrated, and the secondary synchronization is concentrated, and the transmission timings of the two are not adjacent.

11 is a schematic structural diagram of a high-frequency synchronization implementation system based on wide-narrow beam access according to the present application, as shown in FIG. 11, including a transmitting end and a receiving end;

The transmitting end includes at least a control module, a transmitting module, and a receiving module; wherein

The receiving end includes at least a processing module and a feedback module; wherein

The processing module is configured to: after receiving the wide beam, detecting the intra-cell ID and the wide beam ID; after receiving the narrow beam in the coverage area of the detected wide beam ID, detecting the cell group ID and the narrow beam ID; The detected intra-cell ID and cell group ID determine the cell ID;

Optionally, the processing module is configured to: receive the wide beam, and perform related processing on the saved primary synchronization sequence, and when the peak of the correlation result exceeds the preset first threshold T1, detect the transmission sequence and obtain the intra-cell ID. And a wide beam ID; and receiving a plurality of narrow beams in the coverage area of the detected wide beam ID, selecting the one with the highest power, and performing correlation processing with the saved secondary synchronization sequence, when the correlation result is When the peak exceeds the preset second threshold T2, the cell group ID and the narrow beam ID are identified.

Optionally, the processing module is further configured to: if the peak value of the correlation result does not exceed the preset number After the second threshold, the one with the highest power is selected from the remaining narrow beams received, and the saved secondary synchronization sequence is used for correlation processing, when the peak value of the correlation result exceeds the preset second threshold T2. The cell group ID and the narrow beam ID can be identified; if the peak value has not exceeded the preset threshold, the above process is repeated until the cell group ID and the narrow beam ID are detected.

Optionally, the processing module is further configured to: if the threshold is not exceeded after the last received narrow beam is processed, the detection fails.

Among them, the wide beam refers to a beam with a larger HPBW; the narrow beam refers to a beam with a smaller HPBW. The definitions of the wide beam and the narrow beam are not intended to limit the scope of protection of the present application, and are not described herein again.

The primary synchronization sequence may be a CAZAC sequence, or an m sequence, or a Golay sequence. The primary synchronization sequence also identifies the wide beam ID while identifying the ID in the cell group. The secondary synchronization sequence identifies the cell group ID and the narrow beam ID, and the narrow beam included in each sector uses one or a group of Walsh sequences to identify the cell group ID and the narrow beam ID, and all narrow beams use the same Walsh sequence to mark the cell group. The ID may be appended with a secondary sync signal to indicate the narrow beam ID.

The narrow beam direction may be transmitted by using additional information or by using different sequence identifiers.

The transmitting end can be a high frequency station and the receiving end can be a UE.

In addition, an embodiment of the present invention further provides a high frequency station, including at least a control module, a transmitting module, and a receiving module;

Optionally, the primary synchronization sequence may be a CAZAC sequence, or a longest linear shift register m sequence, or a Golay sequence; the primary synchronization sequence identifies a cell group ID and a wide beam ID.

Optionally, the secondary synchronization sequence identifies a cell group ID and a narrow beam ID; the narrow beam included in each sector uses one or a group of Walsh sequences to identify the cell group ID and the narrow wave Bundle ID. All of the narrow beams use the same one or a set of Walsh sequences to identify the cell group ID.

Optionally, all the narrow beams use the same Walsh sequence to mark the cell group ID, and after different narrow beams, additional information indicates the narrow beam ID; or the same narrow beam includes different narrow beams. Walsh sequence, but each wide beam contains the same Walsh sequence, and the cell group IDs indicated by these Walsh sequences are the same.

An embodiment of the present invention further provides a terminal (UE), including at least a processing module, and a feedback module;

Optionally, the secondary synchronization sequence identifies the cell group ID and the narrow beam ID; each fan The narrow beam included in the zone uses one or a set of Walsh sequences to identify the cell group ID and the narrow beam ID.

In addition, an embodiment of the present invention further provides a computer readable storage medium, where computer executable instructions are stored, and the computer executable instructions are implemented by a processor to implement the high frequency synchronization based on wide and narrow beam access applied to a transmitting end. method.

The embodiment of the invention further provides a computer readable storage medium storing computer executable instructions, which are implemented by the processor to implement the high frequency synchronization implementation method based on wide and narrow beam access applied to the receiving end.

One of ordinary skill in the art will appreciate that all or a portion of the above steps may be performed by a program to instruct related hardware, such as a processor, which may be stored in a computer readable storage medium, such as a read only memory, disk or optical disk. Wait. Alternatively, all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module/unit in the above embodiment may be implemented in the form of hardware, for example, by implementing an integrated circuit to implement its corresponding function, or may be implemented in the form of a software function module, for example, executing a program stored in the memory by a processor. / instruction to achieve its corresponding function. This application is not limited to any specific combination of hardware and software.

The above descriptions are only preferred examples of the present application and are not intended to limit the scope of the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application are intended to be included within the scope of the present application.

Industrial applicability

The embodiment of the present application provides a high-frequency synchronization implementation method, system, high-frequency station, and terminal based on wide-narrow beam access, which implements cell search while performing beam training, thereby reducing time consumption of beam search.

Claims

A high frequency synchronization implementation method based on wide and narrow beam access, comprising:

The transmitting end sends a wide beam carrying a primary synchronization sequence at the time of the primary synchronization transmission;

The transmitting end emits a narrow beam carrying a secondary synchronization sequence at the time of the secondary synchronization transmission.
The high frequency synchronization implementation method according to claim 1, wherein said primary synchronization sequence is a constant envelope zero autocorrelation CAZAC sequence, or a longest linear shift register m sequence, or a Gray Golay sequence; said primary synchronization sequence The identification ID and the wide beam ID in the cell group are identified.
The high frequency synchronization implementation method according to claim 1, wherein the secondary synchronization sequence identifies a cell group identification ID and a narrow beam ID.
The high frequency synchronization implementation method according to claim 3, wherein said narrow beam included in each sector identifies said cell group ID and said narrow beam ID by one or a set of synchronous or orthogonal Walsh sequences. .
The high frequency synchronization implementation method according to claim 3, wherein all of the narrow beams use the same Walsh sequence to mark the cell group ID, and after different narrow beams, additional information indicates the narrow beam ID;

Alternatively, the narrow beam included in the same wide beam adopts different Walsh sequences, but each wide beam contains the same Walsh sequence, and the cell group IDs indicated by these Walsh sequences are the same.
The high frequency synchronization implementation method according to claim 1, wherein the direction of the narrow beam is transmitted by using additional information; or, different sequence identification is employed.
A high frequency synchronization implementation method based on wide and narrow beam access, comprising:

After receiving the wide beam, the receiving end detects the identifier ID and the wide beam ID in the cell group;

After receiving the narrow beam in the coverage area of the detected wide beam ID, the receiving end detects the cell group ID and the narrow beam ID;

The receiving end determines the cell ID according to the detected intra-cell ID and the cell group ID, and feeds back the detected wide beam ID and the narrow beam ID to the transmitting end.
The high frequency synchronization implementation method according to claim 7, wherein said receiving end detects The intra-group ID and wide beam ID include:

Receiving, by the receiving end, a wide beam, and performing correlation processing on the primary synchronization sequence stored locally by the receiving end; when the peak value of the correlation processing exceeds a preset first threshold, detecting a transmission sequence and obtaining the cell Intra-group ID and wide beam ID.
The high frequency synchronization implementation method according to claim 7, wherein the detecting end detecting the cell group ID and the narrow beam ID comprises:

Receiving, by the receiving end, a plurality of narrow beams in a coverage area of the detected wide beam ID;

Selecting the one with the highest power and performing correlation processing on the locally saved secondary synchronization sequence, and identifying the cell group ID and the narrow beam when the peak value of the correlation processing exceeds a preset second threshold. ID.
The high frequency synchronization implementation method according to claim 9, wherein if the peak of the result does not exceed the second threshold, the method further comprises:

Receiving, by the receiving end, the one with the highest power from the other narrow beams received, and performing related processing on the locally saved secondary synchronization sequence, when the peak of the correlation result exceeds the preset second At the threshold, the cell group ID and the narrow beam ID are identified.
A high frequency synchronization implementation method based on wide and narrow beam access, comprising:

The transmitting end sends a wide beam carrying the primary synchronization sequence at the time of the primary synchronization transmission; after receiving the wide beam, the receiving end detects the identification ID and the wide beam ID in the cell group;

The transmitting end sends a narrow beam carrying the secondary synchronization sequence at the time of the secondary synchronization transmission; the receiving end detects the cell group ID and the narrow beam ID after receiving the narrow beam in the coverage area of the detected wide beam ID;

The receiving end determines the cell ID according to the detected intra-cell ID and the cell group ID, and feeds back the detected wide beam ID and the narrow beam ID to the transmitting end.
The high frequency synchronization implementation method according to claim 11, wherein said primary synchronization sequence is a constant envelope zero autocorrelation CAZAC sequence, or a longest linear shift register m sequence, or a Gray Golay sequence; said primary synchronization sequence Identifying the intra-cell group ID and the wide beam ID.
The high frequency synchronization implementation method according to claim 11, wherein the secondary synchronization sequence identifies the cell group ID and the narrow beam ID.
The high frequency synchronization implementing method according to claim 13, wherein said narrow beam included in each sector identifies said cell group ID and said narrow beam ID by one or a set of synchronous or orthogonal Walsh sequences. .
The high frequency synchronization implementation method according to claim 13, wherein all of the narrow beams use the same Walsh sequence to mark the cell group ID, and after different narrow beams, additional information indicates the narrow beam ID;

Alternatively, the narrow beam included in the same wide beam adopts different Walsh sequences, but each wide beam contains the same Walsh sequence, and the cell group IDs indicated by these Walsh sequences are the same.
The high frequency synchronization implementation method according to claim 11, wherein the direction of the narrow beam is transmitted by using additional information; or, different sequence identification is employed.
The high frequency synchronization implementation method according to claim 11, wherein the detecting end detecting the intra-cell ID and the wide beam ID comprises:

Receiving, by the receiving end, a wide beam, and performing correlation processing on the primary synchronization sequence stored locally by the receiving end; when the peak value of the correlation processing exceeds a preset first threshold, detecting a transmission sequence and obtaining the cell Intra-group ID and wide beam ID.
The high frequency synchronization implementation method according to claim 11, wherein the detecting end detecting the cell group ID and the narrow beam ID comprises:

Receiving, by the receiving end, a plurality of narrow beams in a coverage area of the detected wide beam ID;

Selecting the one with the highest power and performing correlation processing on the locally saved secondary synchronization sequence, and identifying the cell group ID and the narrow beam when the peak value of the correlation processing exceeds a preset second threshold. ID.
The high frequency synchronization implementation method according to claim 18, if the peak of the result does not exceed the second threshold, the method further comprises:

Receiving, by the receiving end, the one with the highest power from the other narrow beams received, and performing related processing on the locally saved secondary synchronization sequence, when the peak of the correlation result exceeds the preset second At the threshold, the cell group ID and the narrow beam ID are identified.
A high frequency synchronization implementation system based on wide and narrow beam access, comprising a transmitting end and a receiving end; among them,

The transmitting end is configured to send a wide beam carrying the primary synchronization sequence at the time of the primary synchronization transmission; and to emit a narrow beam carrying the secondary synchronization sequence at the time of the secondary synchronization transmission;

The receiving end is configured to: after receiving the wide beam, detecting the identifier ID and the wide beam ID in the cell group; after receiving the narrow beam in the coverage area of the detected wide beam ID, detecting the cell group ID and the narrow beam ID; The cell ID is determined according to the detected intra-cell ID and the cell group ID, and the detected wide beam ID and narrow beam ID are fed back to the transmitting end.
The high frequency synchronization implementation system according to claim 20, wherein the transmitting end comprises at least a control module, a transmitting module and a receiving module; wherein

The control module is configured to send a notification of a primary synchronization transmission time or a secondary synchronization transmission time to the transmitting module according to a preset transmission mode;

The transmitting module is configured to: when receiving the primary synchronization transmission time notification, issue a wide beam carrying the primary synchronization sequence; and receive a secondary synchronization transmission time notification, and send a narrow beam carrying the secondary synchronization sequence;

The receiving module is configured to receive the detected wide beam ID and the narrow beam ID fed back from the receiving end.
The high frequency synchronization implementation system according to claim 20, wherein the receiving end comprises at least a processing module, and a feedback module; wherein

The processing module is configured to: after receiving the wide beam, detecting the intra-cell ID and the wide beam ID; after receiving the narrow beam in the coverage area of the detected wide beam ID, detecting the cell group ID and the narrow beam ID; The detected intra-cell ID and cell group ID determine the cell ID;

The feedback module is configured to feed back the detected wide beam ID and the narrow beam ID to the transmitting end.
The high frequency synchronization implementation system of claim 22, wherein the processing module is configured to:

Receiving a wide beam emitted by the high frequency, and performing correlation processing with the saved primary synchronization sequence; when the peak of the correlation result exceeds a preset first threshold, detecting the transmission sequence and obtaining the intra-cell ID and the wide beam ID; Receiving a plurality of narrow beams in the coverage area of the detected wide beam ID, selecting one of the most powerful ones, and using the saved secondary synchronization sequence to correlate with the saved And, when the peak of the correlation result exceeds a preset second threshold, the cell group ID and the narrow beam ID are identified.
The high frequency synchronization implementation system according to claim 23, wherein the processing module is further configured to:

If the peak of the correlation result does not exceed the second threshold, the one with the highest power is selected from the remaining remaining narrow beams, and the saved secondary synchronization sequence is used for correlation processing, when relevant When the peak of the result exceeds the second threshold, the cell group ID and the narrow beam ID are identified.
The high frequency synchronization implementation system according to any one of claims 20 to 24, wherein said primary synchronization sequence may be a constant envelope zero autocorrelation CAZAC sequence, or a longest linear shift register m sequence, or a Gray Golay sequence ;

The primary synchronization sequence identifies the intra-cell ID and the wide beam ID.
The high frequency synchronization implementation system according to any one of claims 20 to 24, wherein the secondary synchronization sequence identifies the cell group ID and the narrow beam ID;

The narrow beam included in each sector uses one or a set of Walsh sequences to identify the cell group ID and the narrow beam ID.
The high frequency synchronization implementation system according to claim 26, wherein all of said narrow beams use the same Walsh sequence to mark said cell group ID, and after different narrow beams, additional information indicates said narrow beam ID;

Alternatively, the narrow beam included in the same wide beam adopts different Walsh sequences, but each wide beam contains the same Walsh sequence, and the cell group IDs indicated by these Walsh sequences are the same.
The high frequency synchronization implementation system of claim 20, wherein the direction of the narrow beam is transmitted using additional information; or, using a different Walsh sequence identification.
The high frequency synchronization implementation method according to any one of claims 20 to 24, wherein the transmitting end is a high frequency station; and the receiving end is a terminal UE.
A high frequency station comprising at least a control module, a transmitting module and a receiving module; wherein

The control module is configured to send a primary synchronization to the transmitting module according to a preset transmission mode Shooting time notification or secondary synchronous transmission time notification;

The transmitting module is configured to: when receiving the primary synchronization transmission time notification, issue a wide beam carrying the primary synchronization sequence; and receive a secondary synchronization transmission time notification, and send a narrow beam carrying the secondary synchronization sequence;

The receiving module is configured to receive the detected wide beam identification ID and the narrow beam ID fed back from the receiving end.
The high frequency station according to claim 30, wherein

The primary synchronization sequence may be a constant envelope zero autocorrelation CAZAC sequence, or a longest linear shift register m sequence, or a Gray Golay sequence;

The primary synchronization sequence identifies the intra-cell ID and the wide beam ID.
The high frequency station according to claim 30, wherein the secondary synchronization sequence identifies a cell group ID and a narrow beam ID;

The narrow beam included in each sector uses one or a set of Walsh sequences to identify the cell group ID and the narrow beam ID.
The high frequency station of claim 32 wherein all of said narrow beams use the same one or a set of Walsh sequences to identify said cell group ID.
The high frequency station according to claim 33, wherein all of said narrow beams use the same Walsh sequence to mark said cell group ID, and after different narrow beams, additional information indicates said narrow beam ID;

Alternatively, the narrow beam included in the same wide beam adopts different Walsh sequences, but each wide beam contains the same Walsh sequence, and the cell group IDs indicated by these Walsh sequences are the same.
A high frequency station according to claim 30, wherein the direction of said narrow beam is transmitted using additional information; or, different sequence identifications are employed.
A terminal UE includes at least a processing module and a feedback module;

The processing module is configured to: after receiving the wide beam, detect the identifier ID and the wide beam ID in the cell group; after receiving the narrow beam in the coverage area of the detected wide beam ID, detecting the cell group ID and a narrow beam ID; determining a cell ID according to the detected intra-cell ID and cell group ID;

The feedback module is configured to feed back the detected wide beam ID and the narrow beam ID to the transmitting end.
The UE of claim 36, wherein the processing module is configured to:

Receiving a wide beam sent by a high frequency, and performing correlation processing with the saved primary synchronization sequence; when the peak of the correlation result exceeds a preset first threshold, detecting a transmission sequence and obtaining the intra-group ID and the wide beam ID And receiving a plurality of narrow beams in the coverage area of the detected wide beam ID, selecting the one with the highest power, and performing correlation processing with the saved secondary synchronization sequence, when the peak value of the correlation result exceeds the preset The second threshold is used to identify the cell group ID and the narrow beam ID.
The UE of claim 37, wherein the processing module is further configured to:

If the peak of the correlation result does not exceed the second threshold, the one with the highest power is selected from the remaining remaining narrow beams, and the saved secondary synchronization sequence is used for correlation processing, when relevant When the peak of the result exceeds the second threshold, the cell group ID and the narrow beam ID are identified.
The UE according to claim 36, 37 or 38, wherein said primary synchronization sequence may be a constant envelope zero autocorrelation CAZAC sequence, or a longest linear shift register m sequence, or a Gray Golay sequence;

The primary synchronization sequence identifies the intra-cell ID and the wide beam ID.
The UE according to claim 36, 37 or 38, wherein the secondary synchronization sequence identifies the cell group ID and the narrow beam ID;

The narrow beam included in each sector uses one or a set of Walsh sequences to identify the cell group ID and the narrow beam ID.
The UE according to claim 40, wherein all of said narrow beams use the same Walsh sequence to mark said cell group ID, and after different narrow beams, additional information indicates said narrow beam ID;

Alternatively, the narrow beam included in the same wide beam adopts different Walsh sequences, but each wide beam contains the same Walsh sequence, and the cell group IDs indicated by these Walsh sequences are the same.