CN108337075B - Method and device for indicating number of wave beams - Google Patents
Method and device for indicating number of wave beams Download PDFInfo
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- CN108337075B CN108337075B CN201710047912.8A CN201710047912A CN108337075B CN 108337075 B CN108337075 B CN 108337075B CN 201710047912 A CN201710047912 A CN 201710047912A CN 108337075 B CN108337075 B CN 108337075B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0408—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas using two or more beams, i.e. beam diversity
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Abstract
The invention discloses a method and a device for indicating the number of wave beams, wherein the method comprises the following steps: the network device generates at least one symbol; wherein the at least one symbol comprises a first resource block and a second resource block; the first resource block carries a beam reference signal BRS; the second resource block carries the indication information of the number of the wave beams; the network equipment sends the at least one symbol, so that the terminal equipment can detect BRS conveniently according to the number of the beams, and the system overhead is reduced.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for indicating a number of beams.
Background
In order to meet the large capacity demand of the next generation communication system, a fifth generation mobile communication system (5) is introduced to perform communication in a high frequency band greater than 6GHz so as to utilize high-bandwidth and high-rate transmissionth-Generation, 5G). Due to high path loss of high-frequency communication, narrow beams are required to ensure propagation distance and high beam gain, however, the coverage of the narrow beams is limited, and narrow beam alignment between the network device and the terminal device is required to ensure communication quality. The network device may send a synchronization signal, a broadcast signal, and the like in a beam scanning manner, so as to implement functions of initial beam alignment, time frequency synchronization, broadcast signal demodulation, and the like between the network device and the terminal device.
The network device broadcasts system information to the terminal device through a Physical Broadcast Channel (PBCH) for the terminal device to access the network and update the network side system information, and the system information is sent to the terminal device as PBCH data through a plurality of symbols. In addition, when a high-frequency band is introduced for communication, a plurality of narrow beams need to be scanned by the network device and transmitted to the terminal device, and the terminal device needs to identify the beams, determine which narrow beams sent by the network device are suitable for communication with the terminal device, and feed back the beams to the network device. Therefore, a beam Reference Signal is required to help the terminal device identify the plurality of beams transmitted by the network device, and a PBCH Reference Signal (i.e., Demodulation Reference Signal, DMRS) is required to demodulate data of the PBCH.
In a high frequency communication system, a base station can simultaneously transmit a plurality of beams, and the prior art stipulates that the maximum number of transmitted beams is 8, and the 8 beams adopt a code division mode for transmission. As shown in fig. 1, an OFDM (orthogonal frequency division multiplexing) symbol includes a plurality of resource blocks rb (resource block), where one resource block includes a plurality of resource elements RE (resource element), where 8 REs carry beam reference signals for identifying each transmission beam of a base station, and if a base station can only transmit 4 beams at the same time, only the first 4 codewords (0-3) are transmitted. The last 4 codewords are not sent (4-7). The terminal device still detects as the maximum number of beams is 8, and if 4 beams are not transmitted, the 4 beams are considered to be incapable of serving itself.
Since the reference signals are designed according to a maximum of 8 beams in the prior art, when the number of beams is less than 8, 8 REs are still needed to transmit different beam reference signals, which results in waste of resources.
Since the number of beams simultaneously transmitted by each base station is different, if the reference signals are designed according to the maximum number of beams, a large overhead is brought.
Disclosure of Invention
The invention provides a method and a device for indicating the number of beams, which can reduce the system overhead.
In one aspect, a method for beam number indication is provided, the method comprising:
the network device generates at least one symbol; wherein the at least one symbol comprises a first resource block and a second resource block; the first resource block carries a beam reference signal BRS; the second resource block carries the indication information of the number of the wave beams;
the network device transmits the at least one symbol.
Based on the method of the above aspect, a network device is further provided, where the network device includes:
a processor for generating at least one symbol; wherein the at least one symbol comprises a first resource block and a second resource block; the first resource block carries a beam reference signal BRS; the second resource block carries the indication information of the number of the wave beams;
a transmitter for transmitting the at least one symbol.
In another aspect, a method for indicating a number of beams is provided, wherein the method includes:
the terminal equipment receives at least one symbol sent by the network equipment, wherein the at least one symbol comprises a first resource block and a second resource block; the first resource block carries a beam reference signal BRS; the second resource block carries the indication information of the number of the wave beams;
the terminal equipment determines the beam number of the network equipment according to the beam number indication information carried in the second resource block;
and the terminal equipment detects the BRS in the first resource block according to the determined beam number.
In combination with the above another aspect, the first resource block also carries PBCH data, and further includes: and demodulating PBCH data in the first resource block according to the BRS obtained by detection.
Based on the method of the another aspect, a terminal device is further provided, where the terminal device includes:
a receiver, configured to receive at least one symbol sent by a network device, where the at least one symbol includes a first resource block and a second resource block; the first resource block carries a beam reference signal BRS; the second resource block carries the indication information of the number of the wave beams;
the processor is configured to determine the number of beams of the network device according to the indication information of the number of beams carried in the second resource block; and detecting the BRS in the first resource block according to the determined beam number.
With reference to the terminal device in another aspect, the first resource block also carries PBCH data, and the method further includes: and the demodulator is used for demodulating the PBCH data in the first resource block according to the BRS obtained by detection.
With reference to the foregoing aspects, the first resource block is a BRS resource block, and the second resource block is a PBCH resource block. The PBCH resource block comprises a demodulation reference signal DMRS and PBCH data.
In combination with the above aspects, the first resource block and the second resource block are one or more, and are arranged in time division and/or frequency division.
With reference to the above aspects, the first resource block is a PBCH resource block 1, the second resource block is a PBCH resource block 2, and the PBCH resource block 1 and the PBCH resource block 2 form a complete PBCH resource block. Wherein the PBCH resource block 2 includes DMRS and a portion of PBCH data, and the PBCH resource block 1 further includes another portion of PBCH data. The PBCH may be divided into 2 blocks or a plurality of blocks.
In combination with the above aspects, the beam number indication information is carried in PBCH data.
In combination with the above aspects, the BRS is arranged in at least one of: frequency division, code division, time division.
With reference to the above aspects, the symbol is an OFDM symbol.
With reference to the above another aspect, when the first resource block is a PBCH resource block 1 and the second resource block is a PBCH resource block 2, the method further includes: and demodulating PBCH data of the PBCH resource block 1 according to the BRS obtained by detection.
With reference to the terminal device in another aspect, when the first resource block is a PBCH resource block 1, and the second resource block is a PBCH resource block 2, the method further includes: and the demodulator is used for demodulating the PBCH data of the PBCH resource block 1 according to the BRS obtained by detection.
In connection with the above aspects, the first resource and the second resource block are arranged in a time and/or frequency division manner.
In combination with the above aspects, each resource block occupies a plurality of REs, and the plurality of REs are arranged in at least one of the following manners: time division, frequency division, code division.
With reference to the above aspects, the beam number indication information is carried in system information of the first resource block.
Yet another aspect of the present invention provides a computer-readable storage medium having stored therein instructions, which, when executed on a computer, cause the computer to perform the method of the above-described aspects.
Yet another aspect of the present invention provides a computer program product containing instructions which, when run on a computer, cause the computer to perform the method of the above aspects.
According to the method and the device provided by the invention, the second resource block carries the beam number indication information, so that the terminal equipment can conveniently determine the beam number of the network equipment, the BRS in the first resource block is detected according to the beam number, and the system overhead is reduced.
Drawings
FIG. 1 is a diagram of a prior art OFDM symbol;
fig. 2 is a flowchart of a method for indicating a number of beams according to an embodiment of the present invention;
FIG. 3 is a schematic illustration of a symbol according to an embodiment of the present invention;
FIG. 4 is another symbolic illustration provided by the present invention;
fig. 5 is a schematic diagram of a network device according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a terminal device according to an embodiment of the present invention;
fig. 7 is a schematic diagram of a network device or a terminal device according to another embodiment of the present invention.
Detailed Description
The terminal device according to the embodiment of the present invention may communicate with one or more core networks through a Radio Access Network (RAN), and the terminal device may refer to an Access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent, or a user equipment. An access terminal may be a cellular telephone, a cordless telephone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device having Wireless communication capabilities, a computing device or other processing device connected to a Wireless modem, a vehicle mounted device, a wearable device, a user equipment in a future 5G network, etc.
The network device according to the embodiment of the present invention may be used to communicate with a terminal device, and the network device may be, for example, a Base Station (BTS) in a GSM system or a CDMA system, a Base Station (NodeB) in a WCDMA system, an evolved Node B (eNB) or an eNodeB) in an LTE system, or a relay Station, an access point, a vehicle-mounted device, a wearable device, an access point of a Wireless Fidelity (Wi-Fi), a Base Station of a next generation communication, such as a Base Station of 5G, a small Station, a micro Station, or a TRP (transmission and reception point); the system can also be a relay station, an access point, a vehicle-mounted device, a wearable device and the like which work in a high-frequency band.
Referring to fig. 2, fig. 2 is a flowchart of a method for indicating a number of beams according to an embodiment of the present invention, the method includes the following steps:
s101, the network equipment generates at least one symbol.
In this embodiment, an OFDM symbol is taken as an example for explanation, and a network device needs to broadcast system information to a terminal device through a PBCH, where the system information is used for the terminal device to access a network and update network-side system information, where the system information includes some configuration information of the network, such as system characteristics; these system information are carried over OFDM symbols as PBCH Data (Data). In addition, when a high-frequency band is introduced for communication, the network device transmits the OFDM symbols to the terminal device by scanning a plurality of narrow beams, and the terminal device recognizes the beams, determines which narrow beams sent by the network device are suitable for communication with the terminal device, and feeds back the narrow beams to the network device. Therefore, a Beam Reference Signal (BRS) is needed to help the terminal device identify the multiple beams transmitted by the network device, and a demodulation reference signal (DMRS) is needed to demodulate the data of the PBCH, the beam reference signal and the PBCH reference signal also being included in the OFDM symbol. Accordingly, one OFDM symbol includes at least a beam reference signal, a demodulation reference signal (DMRS), and PBCH data. Optionally, the at least one OFDM symbol further includes a Synchronization Signal, e.g., Primary Synchronization Signal (PSS) and Secondary Synchronization Signal (SSS).
In this embodiment, the generated one or more OFDM symbols include a first resource block and a second resource block; the first resource block carries a beam reference signal BRS; the second resource block carries the indication information of the number of the wave beams; the number of the first resource block and the second resource block can be one or more, and each resource block occupies a plurality of REs.
Wherein, the beam reference signal carried in each first resource block is used for the terminal equipment to identify a plurality of beams sent by the network equipment; the beam number indication information in each second resource block is used for indicating the number of the transmission beams of the network equipment. In addition, the second resource block also carries DMRS, which is used for demodulating PBCH data.
The resource blocks may be one or more, arranged in a frequency division manner, or arranged in a time division manner.
In an example, as shown in fig. 3, for one symbol, the first resource block is a BRS resource block, carries a beam reference signal, occupies multiple REs, and may be arranged in a time division, frequency division, or code division manner; the second resource block is a PBCH resource block, carries DMRS and PBCH data, occupies a plurality of REs, can be arranged in a frequency division or time division manner, and in addition, also carries beam quantity indication information which can be particularly carried in the PBCH data; further, the PBCH data includes system information, and the beam number indication information may be carried in the system information.
In another example, as shown in fig. 4, the first resource block is a PBCH resource block 1, the second resource block is a PBCH resource block 2, each resource block occupies multiple REs, and the PBCH resource block 1 and the PBCH resource block 2 form a complete PBCH resource block, that is, the PBCH resource block is divided into two parts; the PBCH resource block 2 comprises DMRS and part of PBCH data, and the PBCH resource block 1 comprises another part of PBCH data besides BRS. The PBCH resource block is processed in a blocking mode, each sub-block carries PBCH data, one sub-block carries beam number information, and the other sub-block carries BRS. In the above example, the PBCH resource block is divided into 2 blocks for explanation, but the PBCH resource block is not limited to 2 blocks, and may be divided into multiple blocks, as long as one block carries the beam number information, and the other block carries the BRS.
Further, the beam reference signals in the plurality of first resource blocks may be set in at least one of the following manners: time, frequency and code division, typically frequency or code division; the PBCH in the plurality of second resource blocks may be set in at least one of the following manners: time division, frequency division and code division, typically time division or frequency division. In this way, the multiplexing modes of the beam reference signals or the PBCH data in the two types of resource blocks are various, and may be any one of time division, frequency division and code division, or a combination of any two of them, or a combination of three of them.
S102, the network equipment sends the at least one symbol.
After the network device generates one or more OFDM symbols, the network device may transmit the one or more OFDM symbols to the terminal device using the transmit beam. In a high frequency system, each symbol may be transmitted using one or more transmit beams, which are convenient for terminal devices at different locations to receive. The terminal device may receive at least one OFDM symbol transmitted by the network device using a certain transmission beam.
S103, the terminal equipment determines the beam number of the network equipment according to the beam number indication information carried by the second resource block in the symbol.
After the terminal device receives one or more OFDM symbols from the network device, since the second resource block in the symbol carries the beam number indication information, the terminal device may determine the transmission beam number of the network device according to the indication information.
Specifically, the second resource block is a PBCH resource block (or PBCH resource block 2), and the specific methods for acquiring the number of beams by demodulating the PBCH resource block may include the following two methods:
if the network device directly carries the information of the number of beams to the system information for transmission, the terminal device demodulates the system information in the PBCH resource block to acquire the specific number of beams.
In addition, the corresponding relationship between the scrambling code and the number of beams may be predefined, and the terminal device may perform scrambling detection on a Cyclic Redundancy Code (CRC) of the system information by using different scrambling codes, determine the scrambling code of the CRC, and further determine the number of beams of the network device according to the scrambling code;
for example, four kinds of scrambling codes are predefined, and correspond to four kinds of beam numbers respectively, as shown in the following table:
| scrambling code | Number of |
| Sequence | |
| 1 | 1 |
| |
2 |
| |
4 |
| |
8 |
The terminal equipment judges which scrambling code on the current CRC is through blind detection, and then determines the number of the sending wave beams of the current network equipment according to the corresponding relation.
And S104, the terminal equipment detects the BRS of the first resource block in the symbol according to the determined beam number.
In addition, when the first resource block is PBCH resource block 1 and the second resource block is PBCH resource block 2, in this case, the terminal device may further demodulate PBCH data of PBCH resource block 1 according to the BRS obtained by detection.
Further, the terminal device may feed back the beam ID to the network device according to the determined number of beams.
By adopting the technical scheme of the embodiment of the invention, one or more symbols generated and sent by the network equipment comprise two resource blocks, one resource block carries the beam number indication information, the other resource block carries the beam reference signal, after the terminal equipment receives the one or more symbols, the beam number of the network equipment is determined according to the beam number indication information carried in one resource block, and then the BRS of the other resource block is detected according to the determined beam number, so that the overhead is greatly reduced.
In addition, since the reference signal is designed according to a maximum of 8 beams in the related art, the number of bits of the beam ID fed back by the terminal device is also wasted. If feedback is made with a maximum of 8 beams, a maximum of 3 bits is required to represent the beam ID. If only 4 beams are transmitted, only a maximum of 2 bits are required to indicate the beam ID, and thus, feeding back the beam ID according to the determined number of beams can also reduce system overhead.
The scheme of the embodiments of the present invention is described in further detail below by two specific exemplary symbol structures:
1, the network device indicates the number of beams through the PBCH resource block, and then the terminal device detects the beam reference signal BRS according to the specific number of beams, thereby determining which beam or beams of the network device are directed to itself.
Referring to fig. 3, taking an OFDM symbol as an example, one OFDM symbol includes two types of resource blocks, each resource block occupies multiple REs, that is, a PBCH resource block and a BRS (beam reference signal) resource block, the number of the resource blocks may be one or more, and the resource blocks may be arranged in a frequency division manner, a code division manner, or a time division manner, and the frequency division arrangement is taken as an example in fig. 3. It should be noted that the OFDM symbol may further include a synchronization signal, such as PSS/SSS.
The PBCH resource block may comprise a plurality of Resource Elements (REs), which may be arranged in a frequency, code or time division manner, typically in a frequency or time division arrangement; a portion of the REs transmit DMRS for demodulation of PBCH data; a portion of the RE transmits PBCH data (data), e.g., system information. The PBCH resource block may carry beam number indication information, may be carried in an RE used for transmitting data, and may be carried in system information, for example. The BRS resource block includes a plurality of REs, and is used to carry BRSs of each beam, and may be in a frequency division manner or a code division manner.
The method comprises the steps that after one or more OFDM symbols are generated by network equipment, the OFDM symbols are sent to terminal equipment, the terminal equipment firstly obtains the beam number of the network equipment by demodulating a PBCH resource block, and for example, the sending beam number of the network equipment is obtained by demodulating system information; and then, the BRS resource blocks are detected according to the number of the beams, so as to determine which beam or beams of the network equipment are aligned with the network equipment.
Referring to fig. 3, the following is illustrated to name a few examples:
as shown in (a) of fig. 3, the terminal device determines that the network device has 8 beams by demodulating the PBCH resource block, for example, by demodulating the system information, and then performs beam detection according to the 8 beams in the BRS resource block. The 8 beams may be sent in frequency division over 8 REs, for example, different beams send reference signals on different REs (1-8), and the terminal detects that there is a signal on that RE to determine which beam is directed to itself; or 8 beams may be transmitted in a code division manner over 8 REs.
As shown in fig. 3(b), the terminal device determines that the network device has 4 beams by demodulating the PBCH resource block, for example, by demodulating the system information, and then performs beam detection according to 4 beams in the BRS resource block. In this example, the beam reference signal still occupies 8 REs, and may be in a frequency division manner or a code division manner; but 4 beams are transmitted on 4 REs and then repeated once on the other 4 REs, which may improve the accuracy of beam detection.
As shown in fig. 3(c), the terminal device determines that the network device has 4 beams by demodulating the PBCH resource block, for example, by demodulating the system information, and then performs beam detection in the BRS resource block according to the number of 4 beams. In this example, the beam reference signal only occupies 4 REs and is transmitted in a frequency division or code division manner. The overhead of the beam reference signal can be reduced here.
In the above embodiment, the actual number of beams of the network device is obtained through the beam number indication information carried by the PBCH resource block, and then the BRS of the BRS resource block is detected according to the number of beams, so that the overhead of the beam reference signal is reduced.
2, partitioning PBCH, wherein PBCH data of one PBCH resource block carries beam number indication information and further carries DMRS; the other PBCH resource block carries PBCH data and BRS; the terminal firstly demodulates a PBCH resource block, acquires the number of beams, and then detects beam reference signals BRS in another PBCH resource block according to the number of the beams to determine which beam or beams of the network equipment are aligned to the terminal.
Referring to fig. 4, taking an OFDM symbol as an example, one or more PBCH resource blocks are included in one OFDM symbol, and 2 PBCH resource blocks may each include a PBCH resource block 1 and a PBCH resource block 2, each PBCH resource block includes multiple REs, and may be arranged in a frequency division, time division, or code division manner. It should be noted that the OFDM symbol may further include a synchronization signal, such as PSS/SSS.
Referring to fig. 4, the following is illustrated to name a few examples:
as shown in fig. 4 (a), the terminal device determines that the network device has 8 beams by demodulating PBCH resource block 2, for example, by demodulating system information, and then performs beam detection in accordance with the 8 beams within PBCH resource block 1 to determine which beam or beams of the network device are directed to itself. Further, PBCH data of PBCH resource block 1 may be demodulated with beam reference signals of 8 beams.
As shown in fig. 4 (b), the terminal device determines that the network device has 4 beams through the demodulation of the PBCH resource block 2, and then performs beam detection in the PBCH resource block 1 according to the number of the 4 beams to determine which beam or beams of the network device are directed to itself. Further, PBCH data of PBCH resource block 1 may be demodulated with beam reference signals of 4 beams.
In the above embodiment, the actual number of beams of the network device is obtained through the beam number indication information carried in the PBCH resource block 2, and then the BRS of the PBCH resource block 1 is detected according to the number of beams, so that the overhead of the beam reference signal is reduced.
Based on the network device in the foregoing method embodiment, referring to fig. 5, there is further provided a network device 1000, where the network device includes:
a generating unit 11 for generating at least one symbol; wherein the at least one symbol comprises a first resource block and a second resource block; the first resource block carries a beam reference signal BRS; the second resource block carries the indication information of the number of the wave beams;
a sending unit 12, configured to send the at least one symbol.
Optionally, the method may further include: a receiving unit (not shown in the figure) for performing the steps of receiving the class in the method embodiment.
The terminal device based on the method of the foregoing embodiment, referring to fig. 6, further provides a terminal device 2000, where the terminal device includes:
a receiving unit 21, configured to receive at least one symbol sent by a network device, where the at least one symbol includes a first resource block and a second resource block; the first resource block carries a beam reference signal BRS; the second resource block carries the indication information of the number of the wave beams;
a determining unit 22, configured to determine the number of beams of the network device according to the indication information of the number of beams carried in the second resource block;
a detecting unit 23, configured to detect the BRS in the first resource block according to the determined number of beams.
The method can further comprise the following steps: and a demodulating unit (not shown in the figure), configured to demodulate, according to the detected BRS, the PBCH data carried by the second resource block.
Optionally, the method may further include: a sending unit (not shown in the figure) for executing the step of sending the class in the method embodiment.
In the foregoing embodiment, when the first resource block is PBCH resource block 1 and the second resource block is PBCH resource block 2, the demodulation unit is specifically configured to demodulate PBCH data of PBCH resource block 1 according to the BRS detected from PBCH resource block 2.
The steps executed by the network device and the terminal device are completely consistent with the method embodiment, the corresponding steps are executed by the corresponding functional modules, and the method embodiment can be referred to for the functions of the specific modules.
The network device and the terminal device have another type of embodiments, that is, the receiving unit may be implemented by a receiver, and performs the step of receiving class in the method embodiment; the sending unit may be implemented by a transmitter, performing the steps of sending the classes in the method embodiment; other corresponding functional units, such as the determining unit, the demodulating unit, the detecting unit, etc. may be implemented by the processor, performing other steps in the method embodiment than transmitting/receiving. In particular, reference may be made to fig. 7, where the functions of the respective devices are referred to in method embodiments, and are not described in detail herein.
The processor may also be referred to as a central processing unit. The processor may be an integrated circuit chip having signal processing capabilities. The processor may also be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, discrete gate or transistor logic, discrete hardware components. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The terms "first," "second," "third," and "fourth," etc. in the description, claims, and drawings of the present invention are used for distinguishing between different objects and not necessarily for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, system, article, or apparatus.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the invention to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website site, computer, server, or data center to another website site, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.
Claims (11)
1. A method of beam number indication, the method comprising:
the network device generates at least one symbol; wherein the at least one symbol comprises a first resource block and a second resource block; the first resource block carries a beam reference signal BRS; the second resource block carries the indication information of the number of the wave beams;
the network device sends the at least one symbol, and the terminal device is used for determining the beam number of the network device according to the beam number indication information carried in the second resource block; and detecting the BRS in the first resource block according to the determined beam number.
2. The method of claim 1, wherein the first resource blocks are BRS resource blocks and the second resource blocks are physical broadcast channel, PBCH, resource blocks.
3. The method of claim 1, wherein the first resource block is PBCH resource block 1 and the second resource block is PBCH resource block 2.
4. The method of claim 3, wherein the PBCH resource block 2 includes a demodulation reference signal (DMRS) and a portion of PBCH data, and the PBCH resource block 1 further includes another portion of PBCH data.
5. The method of any of claims 1-4, wherein the BRS is arranged in at least one of: frequency division, code division, time division.
6. A method of beam number indication, wherein the method comprises:
the terminal equipment receives at least one symbol sent by the network equipment, wherein the at least one symbol comprises a first resource block and a second resource block; the first resource block carries a beam reference signal BRS; the second resource block carries the indication information of the number of the wave beams;
the terminal equipment determines the beam number of the network equipment according to the beam number indication information carried in the second resource block;
and the terminal equipment detects the BRS in the first resource block according to the determined beam number.
7. The method of claim 6, wherein the first resource block further carries physical broadcast channel PBCH data, and further comprising: and demodulating PBCH data in the first resource block according to the BRS obtained by detection.
8. A network device, the network device comprising:
a processor for generating at least one symbol; wherein the at least one symbol comprises a first resource block and a second resource block; the first resource block carries a beam reference signal BRS; the second resource block carries the indication information of the number of the wave beams;
the transmitter is configured to transmit the at least one symbol, and the terminal device is configured to determine the number of beams of the network device according to the indication information of the number of beams carried in the second resource block; and detecting the BRS in the first resource block according to the determined beam number.
9. A terminal device, wherein the terminal device comprises:
a receiver, configured to receive at least one symbol sent by a network device, where the at least one symbol includes a first resource block and a second resource block; the first resource block carries a beam reference signal BRS; the second resource block carries the indication information of the number of the wave beams;
the processor is configured to determine the number of beams of the network device according to the indication information of the number of beams carried in the second resource block; and detecting the BRS in the first resource block according to the determined beam number.
10. The terminal device of claim 9, wherein the first resource block further carries physical broadcast channel PBCH data, and the processor is further configured to demodulate the PBCH data in the first resource block according to the detected BRS.
11. A computer-readable storage medium, characterized in that it stores a computer program which, when executed by a computer device, is able to implement the method of any one of claims 1 to 7.
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| CN104168610A (en) * | 2013-05-17 | 2014-11-26 | 华为技术有限公司 | Method and device for transmitting downlink signal and terminal device |
| CN105191432A (en) * | 2013-01-15 | 2015-12-23 | 三星电子株式会社 | Apparatus and method for discontinuous receive in communication systems with large number of antennas |
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| US9237475B2 (en) * | 2012-03-09 | 2016-01-12 | Samsung Electronics Co., Ltd. | Channel quality information and beam index reporting |
| KR102140298B1 (en) * | 2012-03-27 | 2020-07-31 | 삼성전자주식회사 | Method and apparatus for transmitting beam information in wireless communication system |
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| CN105191432A (en) * | 2013-01-15 | 2015-12-23 | 三星电子株式会社 | Apparatus and method for discontinuous receive in communication systems with large number of antennas |
| CN104168610A (en) * | 2013-05-17 | 2014-11-26 | 华为技术有限公司 | Method and device for transmitting downlink signal and terminal device |
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