CN108366376A - A kind of beam sweeping method and base station - Google Patents

Abstract

A kind of beam sweeping method of the embodiment of the present invention offer and base station, wherein method include：At least one analog beam pattern is selected from multiple analog beam patterns；By the instruction Information encapsulation of at least one analog beam pattern of selection in beam pattern indication signaling；According to the beam pattern indication signaling, beam forming is carried out at least one analog beam pattern of selection；It is scanned using the wave beam after beam forming.The solution of the present invention can make base station while send multiple wave beams, carry out beam scanning, and can access multiple terminals simultaneously.

Description

A beam scanning method and base station

technical field

The invention relates to the communication field, in particular to a beam scanning method and a base station.

Background technique

In the current 3GPP standardization process, in order to ensure a large network coverage, beamforming of the control channel is a very potential way. Therefore, during the initial access process, an initial beam alignment operation needs to be performed between the user and the base station. A possible beam alignment method is a beam sweeping operation. The base station and the user end traverse all TX-RX beam pairs by transmitting reference signals, so as to select the optimal beam pair for specific data communication;

In the beam scanning mode, a large number of beam pairs need to be traversed. For example, for a system with 32 equal-width beams at the base station and 4 equal-width beams at the user end, 128 beam pair scans are required to confirm the optimal beam pair, which will greatly increase the initial access time. Especially in the high-frequency communication system, since the high-frequency channel is easily blocked (blockage), the frequency of initial access in the communication system is greatly increased.

The essence of the beamforming of the control channel is to expand the coverage of the control channel: if the control channel is transmitted in a narrow beam, the coverage area will be large, but the beam search time will be long; if the control channel is transmitted in a wider beam, the coverage Great range, but short beam search times.

Contents of the invention

The technical problem to be solved by the present invention is to provide a beam scanning method and a base station. The base station transmits beams of various widths at the same time to perform beam scanning, and can access multiple terminals at the same time.

In order to solve the problems of the technologies described above, the solution of the present invention is as follows:

A beam scanning method comprising:

selecting at least one simulated beam pattern from a plurality of simulated beam patterns;

encapsulating the indication information of the selected at least one analog beam pattern in beam pattern indication signaling;

performing beamforming on the at least one selected analog beam pattern according to the beam pattern indication signaling;

Scanning with beamformed beams.

Wherein, the step of selecting at least one simulated beam pattern from a plurality of simulated beam patterns comprises:

At least one analog beam pattern is selected from multiple analog beam patterns according to current network load information and/or current terminal distribution information.

Wherein, the step of encapsulating the indication information of the selected at least one analog beam pattern in the beam pattern indication signaling includes:

obtaining location information of the selected at least one analog beam pattern;

Encapsulating the at least one analog beam pattern and the location information respectively corresponding to the at least one analog beam pattern in beam pattern indication signaling.

Wherein, the step of encapsulating the at least one analog beam pattern and the position information respectively corresponding to the at least one analog beam pattern in the beam pattern indication signaling includes:

If the at least one analog beam pattern is N, and the beam pattern indication signaling is N fields, each of the N analog beam patterns and the position information of the analog beam pattern are respectively in order Encapsulated in a field of the beam pattern indication signaling, the rotation direction of the at least one analog beam pattern is a first default value, and the rotation angle is a second default value; wherein N is a positive integer.

Wherein, the first default value is clockwise or counterclockwise; the second default value is the coverage angle corresponding to the beam with the smallest beam coverage angle in each simulated beam pattern.

Wherein, the step of encapsulating the at least one analog beam pattern and the position information respectively corresponding to the at least one analog beam pattern in the beam pattern indication signaling includes:

If the at least one analog beam pattern is N, and the beam pattern indication signaling is N+1 fields, then each of the N analog beam patterns and the position information of the analog beam pattern, according to The order is respectively encapsulated in a field of the beam pattern indication signaling, and the rotation direction and rotation angle of the scanning of the at least one analog beam pattern are encapsulated in the N+1th field of the beam pattern indication signaling, Where N is a positive integer.

Wherein, the beam scanning method further includes: constructing beam codebook indication information, and encapsulating beam information of the at least one analog beam pattern in the beam codebook indication information.

Wherein, the beam information of the simulated beam pattern includes: beam width and power intensity.

Wherein, the steps of scanning with the beam after beamforming include:

According to the rotation direction and the rotation angle of the scanning of the at least one simulated beam pattern, periodic rotation scanning is performed by using the beam after beam forming.

Wherein, the at least one analog beam pattern includes: an analog beam pattern of equal width or an analog beam pattern of unequal width.

Embodiments of the present invention also provide a base station, including:

a beam selection module for selecting at least one simulated beam pattern from a plurality of simulated beam patterns;

An encapsulation module, configured to encapsulate the indication information of the selected at least one analog beam pattern in beam pattern indication signaling;

A beamforming module, configured to perform beamforming on the at least one selected analog beam pattern according to the beam pattern indication signaling;

The scanning module is used for scanning with the beam formed by the beam.

Wherein, the beam selection module is specifically configured to select at least one analog beam pattern from multiple analog beam patterns according to current network load information and/or current terminal distribution information.

Wherein, the encapsulation module is specifically configured to acquire the position information of the selected at least one analog beam pattern; encapsulate the at least one analog beam pattern and the position information respectively corresponding to the at least one analog beam pattern in the beam pattern indication signal order.

Wherein, the encapsulation module includes: a first encapsulation unit, configured to combine each of the N analog beam patterns The analog beam pattern and the position information of the analog beam pattern are respectively encapsulated in a field of the beam pattern indication signaling in sequence, the rotation direction of the at least one analog beam pattern is a first default value, and the rotation angle is a second default value. Default; where N are positive integers.

Wherein, the first default value is clockwise or counterclockwise, and the second default value is the coverage angle corresponding to the beam with the smallest beam coverage angle in each simulated beam pattern.

Wherein, the encapsulation module includes: a second encapsulation unit, configured to include N fields in the at least one analog beam pattern, and N+1 fields in the beam pattern indication signaling, and convert each of the N analog beam patterns An analog beam pattern and the position information of the analog beam pattern are respectively encapsulated in a field of the beam pattern indication signaling in sequence, and the scanning rotation direction and rotation angle of the at least one analog beam pattern are encapsulated in the In the N+1th field in the beam pattern indication signaling, where N is a positive integer.

Wherein, the base station further includes: a codebook construction module, configured to construct beam codebook indication information, and encapsulate beam information of the at least one analog beam pattern into the beam codebook indication information.

Wherein, the beam information of the simulated beam pattern includes: beam width and power intensity.

Wherein, the scanning module is specifically configured to: perform periodic rotational scanning with beams after beamforming according to the rotational direction and rotational angle of the scanning of the at least one analog beam pattern.

Wherein, the at least one analog beam pattern includes: an analog beam pattern of equal width or an analog beam pattern of unequal width.

Above-mentioned scheme of the present invention comprises following beneficial effect at least:

In the above solution of the present invention, at least one analog beam pattern is selected from a plurality of analog beam patterns; the indication information of the selected at least one analog beam pattern is encapsulated in the beam pattern indication signaling; according to the beam pattern indication signal So, beamforming is performed on the at least one selected analog beam pattern; scanning is performed using the beamformed beam. Therefore, the base station can transmit multiple beams at the same time, perform beam scanning, and access multiple terminals at the same time.

Description of drawings

Fig. 1 is a communication flow chart from initial terminal access to data communication stage;

Fig. 2 is the flowchart of the beam scanning method of the embodiment of the present invention;

3 is a first format diagram of the beam pattern indication signaling in the beam scanning method of the present invention;

4 is a second format diagram of the beam pattern indication signaling in the beam scanning method of the present invention;

Fig. 5 is a schematic diagram of scanning with multiple beams of equal width;

Fig. 6 is a schematic diagram of scanning with multiple beams of unequal width;

Fig. 7 is a schematic diagram of the module structure of the base station of the present invention.

Detailed ways

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

As shown in Figure 1, in 5G communication, the overall process of terminal initial access to data communication stage includes: Step 1, analog beam acquisition; Step 2, semi-dynamic SRS (Sounding Reference Signal) configuration and SRS transmission; Step 3 , CSI-RS (Channel State Information-Reference Signal) transmission and CSI feedback; step 4, data transmission.

In the initial access phase of step 1 of the above process, the beam scanning method on the base station side, as shown in Figure 2, a beam scanning method includes:

Step 121, selecting at least one simulated beam pattern from a plurality of simulated beam patterns;

Preferably, the base station may select at least one analog beam pattern from multiple analog beam patterns according to current network load information and/or current terminal distribution information.

Step 122, encapsulating indication information of the at least one selected analog beam pattern in beam pattern indication signaling.

Step 123: Perform beamforming on the at least one selected analog beam pattern according to the beam pattern indication signaling.

Step 124, scan with the beam formed by the beam.

In the above embodiments of the present invention, at least one analog beam pattern is selected from a plurality of analog beam patterns; the indication information of the selected at least one analog beam pattern is encapsulated in the beam pattern indication signaling; according to the beam pattern indication Signaling, performing beamforming on the at least one selected analog beam pattern; scanning with the beamformed beam. Therefore, the base station can transmit multiple beams at the same time, perform beam scanning, and access multiple terminals at the same time.

The second embodiment of the present invention provides a beam scanning method, including:

Step 211, selecting at least one analog beam pattern from a plurality of analog beam patterns;

Preferably, the base station may select at least one analog beam pattern from multiple analog beam patterns according to current network load information and/or current terminal distribution information.

Step 221, acquiring position information of the at least one selected analog beam pattern; the position information here may be sequence information of the at least one analog beam pattern when arranged sequentially, such as serial number information.

Step 222: Encapsulate the at least one analog beam pattern and the location information respectively corresponding to the at least one analog beam pattern in beam pattern indication signaling.

Step 223: Perform beamforming on the at least one selected analog beam pattern according to the beam pattern indication signaling.

Step 224, scan with the beam formed by the beam.

In the second embodiment of the present invention, at least one analog beam pattern is selected from a plurality of analog beam patterns; the at least one analog beam pattern and the position information respectively corresponding to the at least one analog beam pattern are encapsulated in the beam pattern indication signal In the command: according to the beam pattern indication signaling, beamforming is performed on the at least one selected analog beam pattern; and scanning is performed using the beamformed beam. Therefore, the base station can transmit multiple beams at the same time, perform beam scanning, and access multiple terminals at the same time.

A third embodiment of the present invention provides a beam scanning method, including:

Step 311, selecting at least one analog beam pattern from a plurality of analog beam patterns;

Preferably, the base station may select at least one analog beam pattern from multiple analog beam patterns according to current network load information and/or current terminal distribution information.

Step 321, acquiring position information of the at least one selected analog beam pattern; the position information here may be sequence information of the at least one analog beam pattern when arranged sequentially, such as serial number information.

Step 322, if the at least one analog beam pattern is N, and the beam pattern indication signaling is N fields, each of the N analog beam patterns and the location information of the analog beam pattern, Encapsulated respectively in a field of the beam pattern indication signaling (BEAM-PATTERN-INDEX) in order, the rotation direction of the at least one analog beam pattern is a first default value, and the rotation angle is a second default value; where N a positive integer.

Wherein, the first default value is clockwise or counterclockwise, and the second default value is the coverage angle corresponding to the beam with the smallest beam coverage angle in each simulated beam pattern.

The structure of the beam pattern indication signaling is shown in FIG. 3 . If one field in the beam pattern indication signaling with N fields is empty, N−1 beams are used for scanning.

Step 323: Perform beamforming on the at least one selected analog beam pattern according to the beam pattern indication signaling.

Step 324, scan with the beam formed by the beam.

In this embodiment of the present invention, through the indication signaling of N fields, the base station can simultaneously use N beams to scan according to the default rotation direction and rotation angle.

A fourth embodiment of the present invention provides a beam scanning method, including:

Step 411, selecting at least one analog beam pattern from a plurality of analog beam patterns;

Preferably, the base station may select at least one analog beam pattern from multiple analog beam patterns according to current network load information and/or current terminal distribution information.

Step 421, acquiring position information of the at least one selected analog beam pattern; the position information here may be sequence information of the at least one analog beam pattern when arranged sequentially, such as serial number information.

Step 422, if the at least one simulated beam pattern is N, and the beam pattern indication signaling is (N+1) fields, each of the N simulated beam patterns and the simulated beam pattern The position information of the beam pattern is respectively encapsulated in a field of the beam pattern indication signaling in order, and the rotation direction and rotation angle of the scanning of the at least one analog beam pattern are encapsulated in the beam pattern indication signaling. +1) fields, where N is a positive integer. The structure of the beam pattern indication signaling is shown in FIG. 4 .

Step 423: Perform beamforming on the at least one selected analog beam pattern according to the beam pattern indication signaling.

Step 424, scan with the beam formed by the beam.

In this embodiment of the present invention, through the indication signaling of (N+1) fields, the base station can simultaneously use N beams to scan according to the rotation direction and rotation angle set in the (N+1)th field.

In the above embodiments of the present invention, the beam scanning method further includes: constructing beam codebook indication information, and encapsulating beam information of the at least one analog beam pattern in the beam codebook indication information. The beam information of the simulated beam pattern includes: beam width and power intensity.

In the above embodiments of the present invention, the step of scanning with the beam after beam forming may specifically include: performing periodic rotation with the beam after beam forming according to the rotation direction and rotation angle of the scan of the at least one simulated beam pattern scanning.

Wherein, the at least one simulated beam pattern includes: at least one simulated beam pattern with equal width (as shown in FIG. 5 ) or at least one simulated beam pattern with unequal width (as shown in FIG. 6 ). Therefore, the base station can simultaneously transmit multiple beams of equal width for scanning, and also can simultaneously transmit multiple beams of different widths for scanning.

In the above embodiments of the present invention, by adding a BEAM-PATTERN-INDEX (beam pattern indication) signaling, the signaling can contain N+1 fields or N fields, including the pattern and position information corresponding to N beams , where the parameter N represents the maximum number of beams under multi-beam scanning, if a field is empty, it means that (N-1) beams are used for scanning, and so on.

Among them, under (N+1) fields, the last field indicates the rotation direction and angle of beam scanning; under N fields, the default rotation direction of beam scanning is clockwise or counterclockwise (can be preset), and beam scanning The angle defaults to the coverage angle corresponding to the beam with the smallest beam coverage angle among the single beams. Wherein, the single beam pattern information includes beam width, power intensity, etc., which can be indicated by pre-constructing a beam codebook.

The above-mentioned embodiment of the present invention adopts the mode of periodic scanning of beams of various widths, which is more reasonable for the initial access of the high-frequency communication system; mainly to enable the user terminal to access, instead of selecting the optimal beam for access, And multiple terminals access at the same time. Therefore, in the subsequent communication process, the user terminal can further update the beam based on the current beam, and select a beam with a higher signal strength for communication, thereby dynamically optimizing the beam. Since the terminal has been connected at this time, the terminal and the base station can carry out effective information exchange, and then carry out fine beam scanning, and its efficiency will be greatly improved.

As shown in FIG. 7, an embodiment of the present invention also provides a base station 700, including:

A beam selection module 711, configured to select at least one analog beam pattern from a plurality of analog beam patterns;

An encapsulating module 712, configured to encapsulate the indication information of the selected at least one analog beam pattern in beam pattern indication signaling;

A beamforming module 713, configured to perform beamforming on the at least one selected analog beam pattern according to the beam pattern indication signaling;

The scanning module 714 is configured to perform scanning by using the beam formed by the beam.

Wherein, the beam selection module 711 is specifically configured to select at least one analog beam pattern from multiple analog beam patterns according to current network load information and/or current terminal distribution information.

Wherein, the encapsulation module 712 is specifically configured to acquire the position information of the selected at least one analog beam pattern; encapsulate the at least one analog beam pattern and the position information respectively corresponding to the at least one analog beam pattern in the beam pattern indication signaling.

Wherein, the encapsulation module 712 includes: a first encapsulation unit, configured to pack each of the N analog beam patterns An analog beam pattern and the position information of the analog beam pattern are respectively encapsulated in a field of the beam pattern indication signaling in sequence, the rotation direction of the at least one analog beam pattern is the first default value, and the rotation angle is the second Two default values; where N are positive integers.

Wherein, the first default value is clockwise or counterclockwise; the second default value is the coverage angle corresponding to the beam with the smallest beam coverage angle in each simulated beam pattern.

Wherein, the encapsulation module 712 includes: a second encapsulation unit, configured to, when the at least one analog beam pattern is N, the beam pattern indication signaling is N+1 fields, and the N analog beam patterns Each analog beam pattern and the position information of the analog beam pattern are respectively encapsulated in a field of the beam pattern indication signaling in sequence, and the scanning rotation direction and rotation angle of the at least one analog beam pattern are encapsulated in the In the N+1th field in the beam pattern indication signaling, N is a positive integer.

Wherein, the base station further includes: a codebook construction module, configured to construct beam codebook indication information, and encapsulate beam information of the at least one analog beam pattern in the beam codebook indication information.

Wherein, the beam information of the simulated beam pattern includes: beam width and power intensity.

Wherein, the scanning module is specifically configured to: perform periodic rotational scanning with beams after beamforming according to the rotational direction and rotational angle of the scanning of the at least one analog beam pattern.

Wherein, the at least one analog beam pattern includes: an analog beam pattern of equal width or an analog beam pattern of unequal width.

In the above embodiments of the present invention, the beam selection module of the base station selects an appropriate analog beam pattern according to basic information such as current network load information and known current user distribution information;

The encapsulation module encapsulates the indication information corresponding to the selected beam pattern into the beam pattern indication signaling (BEAM-PATTERN-INDEX signaling);

The beam selection module transmits the beam pattern indication signaling to the beamforming module;

The beamforming module performs beamforming according to the beam pattern instruction signaling, and performs periodic rotation according to a certain rotation angle, and the scanning module performs beam scanning;

The base station of the present invention is a base station corresponding to the above-mentioned method embodiment, and all the implementation methods in the above-mentioned method embodiment are applicable to the embodiment of the base station, and the base station also adopts the beam periodic scanning method of various widths, which is more reasonable Perform initial access to the high-frequency communication system; mainly to enable terminal terminals to access, rather than selecting the optimal beam for access, and multiple terminals access at the same time.

Therefore, in the subsequent communication process, the terminal can further update the beam based on the current beam, and select a beam with a higher signal strength for communication, thereby dynamically optimizing the beam. Since it has been connected at this time, the terminal end and the base station end can carry out effective information exchange, and then perform fine beam scanning, and its efficiency will be greatly improved.

The above description is a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications can also be made. It should be regarded as the protection scope of the present invention.

Claims (20)

1. a kind of beam sweeping method, which is characterized in that including：

At least one analog beam pattern is selected from multiple analog beam patterns；

By the instruction Information encapsulation of at least one analog beam pattern of selection in beam pattern indication signaling；

According to the beam pattern indication signaling, beam forming is carried out at least one analog beam pattern of selection；

It is scanned using the wave beam after beam forming.

2. beam sweeping method according to claim 1, which is characterized in that selected at least from multiple analog beam patterns The step of one analog beam pattern includes：

According to current network load information and/or present terminal distributed intelligence, at least one is selected from multiple analog beam patterns A analog beam pattern.

3. beam sweeping method according to claim 1, which is characterized in that by least one analog beam of selection Step of the instruction Information encapsulation of pattern in beam pattern indication signaling include：

Obtain the location information of at least one analog beam pattern of selection；

By at least one analog beam pattern and the corresponding location information envelope of at least one analog beam pattern In beam pattern indication signaling.

4. beam sweeping method according to claim 3, which is characterized in that by least one analog beam pattern and The step that the corresponding location information of at least one analog beam pattern is encapsulated in beam pattern indication signaling includes：

If at least one analog beam pattern is N number of, the beam pattern indication signaling is N number of field, then by N number of simulation The location information of each analog beam pattern and the analog beam pattern in beam pattern, is individually enclosed in institute in order In a field for stating beam pattern indication signaling, the direction of rotation of at least one analog beam pattern is the first acquiescence Value, rotation angle are the second default value；Wherein N number of positive integer.

5. beam sweeping method according to claim 4, which is characterized in that first default value is clockwise or inverse Hour hands；Second default value is the corresponding angle of coverage of wave beam of wave cover angle minimum in each analog beam pattern.

6. beam sweeping method according to claim 4, which is characterized in that by least one analog beam pattern and The step that the corresponding location information of at least one analog beam pattern is encapsulated in beam pattern indication signaling includes：

If at least one analog beam pattern is N number of, the beam pattern indication signaling is N+1 field, then by N number of mould The location information of each analog beam pattern and the analog beam pattern in quasi- beam pattern, is individually enclosed in order In one field of the beam pattern indication signaling, by the direction of rotation of the scanning of at least one analog beam pattern and Rotation angle is encapsulated in the beam pattern indication signaling in the N+1 field, and wherein N is positive integer.

7. beam sweeping method according to claim 1, which is characterized in that further include：

It builds wave beam code book and indicates information, and the beam information of at least one analog beam pattern is encapsulated in the wave beam Code book indicates in information.

8. beam sweeping method according to claim 7, which is characterized in that the beam information packet of the analog beam pattern It includes：Beam angle and power level.

9. the beam sweeping method according to claim 4 or 6, which is characterized in that carried out using the wave beam after beam forming The step of scanning includes：

Direction of rotation according to the scanning of at least one analog beam pattern and rotation angle, utilize the wave after beam forming The periodic rotation sweeps of Shu Jinhang.

10. beam sweeping method according to claim 1, which is characterized in that at least one analog beam pattern packet It includes：Wide analog beam pattern or not wide analog beam pattern.

11. a kind of base station, which is characterized in that including：

Beam selection module, for selecting at least one analog beam pattern from multiple analog beam patterns；

The instruction Information encapsulation of package module, at least one analog beam pattern for that will select is indicated in beam pattern In signaling；

Beamforming block is used for according to the beam pattern indication signaling, at least one analog beam figure of selection Case carries out beam forming；

Scan module, for being scanned using the wave beam after beam forming.

12. base station according to claim 11, which is characterized in that the beam selection module is specifically used for according to current net Network load information and/or present terminal distributed intelligence select at least one analog beam pattern from multiple analog beam patterns.

13. base station according to claim 11, which is characterized in that the package module is specifically used for obtaining the described of selection The location information of at least one analog beam pattern；By at least one analog beam pattern and at least one analog wave The corresponding location information of beam pattern is encapsulated in beam pattern indication signaling.

14. base station according to claim 13, which is characterized in that the package module includes：

First encapsulation unit, for being N number of at least one analog beam pattern, the beam pattern indication signaling is N When a field, by the location information of each analog beam pattern and the analog beam pattern in N number of analog beam pattern, It is individually enclosed in order in a field of the beam pattern indication signaling, the rotation of at least one analog beam pattern It is the first default value to turn direction, and rotation angle is the second default value；Wherein N number of positive integer.

15. base station according to claim 14, which is characterized in that first default value is clockwise or counter-clockwise； Second default value is the corresponding angle of coverage of wave beam of wave cover angle minimum in each analog beam pattern.

16. base station according to claim 14, which is characterized in that the package module includes：

Second encapsulation unit, for being N number of at least one analog beam pattern, the beam pattern indication signaling is N+ 1 field, by the location information of each analog beam pattern and the analog beam pattern in N number of analog beam pattern, It is individually enclosed in order in a field of the beam pattern indication signaling, by least one analog beam pattern The direction of rotation of scanning and rotation angle are encapsulated in the beam pattern indication signaling in the N+1 field, and wherein N is just whole Number.

17. base station according to claim 11, which is characterized in that further include：

Code book builds module, indicates information for building wave beam code book, and by the wave beam of at least one analog beam pattern Information encapsulation is indicated in the wave beam code book in information.

18. base station according to claim 17, which is characterized in that the beam information of the analog beam pattern includes：Wave Beam width and power level.

19. the base station according to claim 14 or 16, which is characterized in that the scan module is specifically used for：According to described The direction of rotation of the scanning of at least one analog beam pattern and rotation angle are carried out periodically using the wave beam after beam forming Rotation sweep.

20. base station according to claim 11, which is characterized in that at least one analog beam pattern includes：It is wide Analog beam pattern or not wide analog beam pattern.