WO2018121186A1

WO2018121186A1 - Method and apparatus for sending and receiving ofdm symbol

Info

Publication number: WO2018121186A1
Application number: PCT/CN2017/114430
Authority: WO
Inventors: 黄煌; 李赛楠
Original assignee: 华为技术有限公司
Priority date: 2016-12-29
Filing date: 2017-12-04
Publication date: 2018-07-05
Also published as: CN108259147A; CN108259147B

Abstract

Disclosed in embodiments of the present invention are a method and apparatus for sending and receiving an OFDM symbol. The method comprises: a network device generates at least one OFDM symbol, the at least one OFDM symbol comprising multiple first resource blocks and multiple second resource blocks, the port quantity and/or the port numbers of reference signals of the multiple first resource blocks being different from the port quantity and/or the port numbers of reference signals of the multiple second resource blocks, each first resource block carrying a beam reference signal, and each second resource block carrying a PBCH reference signal; the network device sends the at least one OFDM symbol by using a sending beam; a terminal device identifies, by using the beam reference signal carried by each first resource block, multiple beams sent by the network device; and the terminal device demodulates data in the at least one OFDM symbol according to the PBCH reference signal. The embodiments of the present invention can satisfy identification of beams and demodulation of PBCH data, and overheads for transmitting beam reference signals and PBCH reference signals by a network device side are greatly reduced.

Description

Method and device for transmitting and receiving OFDM symbols

The present application claims priority to Chinese Patent Application No. 201611247737.9, filed on Dec. 29, 2016, the entire disclosure of which is incorporated herein by reference. In the application.

Technical field

The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for transmitting and receiving orthogonal frequency division multiplexing (OFDM) symbols.

Background technique

Hotspot To meet the needs of large-capacity next generation communication systems, the introduction of high-frequency bands is greater than 6GHz communicate, to utilize large bandwidth, high speed transfer rate, the fifth generation mobile communication system (5 ^th -Generation, 5G) of one. Due to the high path loss of high frequency communication, a narrow beam is needed to ensure the propagation distance and high beam gain. However, the narrow beam coverage is limited. In order to ensure communication quality, narrow beam alignment between the network side device and the terminal device is required.

The network device needs to broadcast system information to the terminal device through a Physical Broadcast Channel (PBCH), the terminal device accesses the network, and updates network-side system information, which is useful data of the PBCH. In addition, when the high frequency band is introduced for communication, the narrowband beam is scanned by the network device and transmitted to the terminal device. The terminal device needs to identify the beams, determine which narrow beams are sent by the network device, and feed back to the network device. Therefore, a beam reference signal is needed to help the terminal device identify multiple beams transmitted by the network device, and a PBCH reference signal (ie, Demodulation Reference Signal, DMRS) is required to demodulate the data of the PBCH.

A schematic diagram of a transmission configuration of a prior art PBCH reference signal and a beam reference signal as shown in FIG. 1, the prior art PBCH reference signal is completely included in the beam reference signal. The resource block of the PBCH of each symbol is composed of 12 resource elements (RE elements), of which 8 REs are beam reference signals, and the other 4 REs are useful PBCH data for transmission. Each symbol supports simultaneous transmission of 8 beams, each beam transmitting a different beam reference signal on 8 REs. The eight beam reference signals are transmitted in a code division manner. The terminal device detects the beam reference signal on each resource block, so that the quality of the beam on each resource block can be known, and the beam identifier and the corresponding beam quality can be fed back to the network side device for scheduling by the network side device. The beam transmits data to the terminal device.

Because the beam quality of the whole frequency band needs to be measured, a total of 82 PBCH resource blocks, each resource block uses 8 REs to transmit beam reference signals, and only 4 REs transmit useful PBCH data, and the transmission overhead is very high. Large, reaching 8/12.

Therefore, how to reduce the overhead of transmitting the beam reference signal and the PBCH reference signal while satisfying the identification of the beam and the demodulation of the PBCH data is a problem that needs to be solved currently.

Summary of the invention

The present invention provides a method and apparatus for transmitting and receiving OFDM symbols to reduce the overhead of transmitting a beam reference signal and a PBCH reference signal while satisfying beam identification and demodulation of PBCH data.

In a first aspect, a method for transmitting orthogonal frequency division multiplexing OFDM symbols is provided, where the method includes:

The network device generates at least one OFDM symbol;

The at least one OFDM symbol includes a plurality of first resource blocks and a plurality of second resource blocks, and the number of ports and/or ports of the reference signals of the plurality of first resource blocks and the plurality of second resource blocks Different numbers;

Each of the first resource blocks carries a beam reference signal, where the beam reference signal is used by the terminal device to identify multiple beams sent by the network device; each second resource block carries a physical broadcast channel PBCH reference signal. The reference signal of the PBCH is used to demodulate the PBCH data;

The network device transmits the at least one OFDM symbol by using a transmit beam.

In this implementation manner, at least one OFDM symbol generated and transmitted by the network device is divided into two types of resource blocks, and only one type of resource block carries a beam reference signal, and the resource block can be used as a beam identification, and another A type of resource block carries a PBCH reference signal, which can be used as a demodulation of PBCH data, thereby reducing the overhead of transmitting a beam reference signal and a PBCH reference signal while satisfying beam identification and demodulation of PBCH data.

In an implementation manner of the first aspect, the beam reference signal carried in each of the first resource blocks is further used to detect a beam quality of the identified multiple beams in each of the first resource blocks, The PBCH reference signal carried in each second resource block is further used by the terminal device to detect a beam quality of the identified multiple beams in each of the second resource blocks.

In this implementation manner, performing full-band beam quality detection on two types of resource blocks included in at least one OFDM symbol for multiple beams identified by a plurality of types of resource blocks can ensure the quality of the detected beam.

In another implementation manner of the first aspect, the number of ports of the second resource block is less than the number of ports of the first resource block.

In this implementation manner, since different beams in the same polarization cover different ranges, the terminal device can only receive a few beams in the same polarization, and the beam energy of the port of the reference signal of the second resource block is mainly From the few beams, the reference signal of the second resource block is used to further detect the beam quality of the identified few beams with better beam quality in the second resource block, so that the number of ports of the second resource block is less than The number of ports of the first resource block, thereby further saving signaling overhead in the second resource block.

In still another implementation of the first aspect, the beam reference signal carried in the first resource block is further used to demodulate PBCH data.

In this implementation, the reference signal in the first resource block can also be used as a PBCH reference signal, so that the data of the PBCH can be demodulated.

In still another implementation of the first aspect, the reference signals in the plurality of first resource blocks are set in at least one of: time division, frequency division, and code division, and the plurality of second resource blocks The reference signal in is set in at least one of the following ways: time division, frequency division, and code division.

In this implementation manner, the reference signals in the two types of resource blocks are multiplexed in various manners, and may be any one of time division, frequency division, code division, or a combination of any two or a combination of the three.

In still another implementation of the first aspect, the at least one OFDM symbol further includes a synchronization signal.

In this implementation, the at least one OFDM symbol may include a synchronization signal, such as a primary synchronization signal and/or a secondary synchronization signal, in addition to two types of resource blocks.

In still another implementation of the first aspect, the multiple first resource blocks and the plurality of second resource blocks are combined into a plurality of third resource blocks, where the beams are in the multiple third resource blocks The reference signal and the PBCH reference signal are interleaved in the frequency domain.

In this implementation, the beam reference signal and the PBCH reference signal can be set in one resource block.

In a second aspect, a network device is provided, the network device having a function of implementing the behavior of the network device in the above method. The functions may be implemented by hardware or by corresponding software implemented by hardware. The hardware or software includes one or more modules corresponding to the functions described above.

In a possible implementation manner, the network device includes:

Generating unit, configured to generate at least one orthogonal frequency division multiplexing OFDM symbol;

And a sending unit, configured to send, by using a transmit beam, the at least one OFDM symbol generated by the generating unit.

In another possible implementation, the network device includes: a receiver, a transmitter, a memory, and a processor; wherein the memory stores a set of program codes, and the processor is configured to call the program code stored in the memory, and execute the following operating:

Generating at least one orthogonal frequency division multiplexing OFDM symbol;

The at least one OFDM symbol is transmitted by the transmitter using a transmit beam.

Based on the same inventive concept, the principle and the beneficial effects of the device can be referred to the first aspect and the possible implementation manners of the first aspect and the beneficial effects. Therefore, the implementation of the device can be referred to the implementation of the method. The repetitions are not repeated here.

In a third aspect, a method for receiving an OFDM symbol is provided, the method comprising:

The terminal device receives at least one OFDM symbol that the network device transmits by using a transmit beam, where the at least one OFDM symbol includes a plurality of first resource blocks and a plurality of second resource blocks, and the plurality of first resource blocks and the multiple The number of ports and/or the port number of the reference signal of the second resource block is different, wherein each of the first resource blocks carries a beam reference signal, and each of the second resource blocks carries a physical broadcast channel PBCH reference signal;

Identifying, by the terminal device, the multiple beams sent by the network device according to the beam reference signal carried by each of the first resource blocks;

The terminal device demodulates data in the at least one OFDM symbol according to the PBCH reference signal.

In this implementation manner, in the at least one OFDM symbol received by the terminal device from the network device, the at least one OFDM symbol is divided into two types of resource blocks, and the beam reference signal is carried by only one type of resource block, and is carried in another type of resource block. a PBCH reference signal, the terminal device identifies a plurality of beams transmitted by the network device according to the beam reference signal carried in the resource block, and the data in the at least one OFDM symbol according to the PBCH reference signal carried in the other type of resource block Demodulation can simultaneously satisfy the identification of the beam and the demodulation of the PBCH data, and the overhead of transmitting the beam reference signal and the PBCH reference signal on the network device side is greatly reduced.

In an implementation manner of the third aspect, the method further includes:

The terminal device detects, according to the beam reference signal carried in each of the first resource blocks, a beam quality of the identified multiple beams in each of the first resource blocks;

The terminal device detects, according to the PBCH reference signal carried in each of the second resource blocks, a beam quality of the identified multiple beams in each of the second resource blocks.

In this implementation manner, the terminal device performs full-band beam quality detection on two types of resource blocks included in the at least one OFDM symbol for the multiple beams identified by the multiple resource blocks, thereby ensuring the quality of the detected beam. .

In another implementation manner of the third aspect, the number of ports of the second resource block is less than the number of ports of the first resource block.

In this implementation manner, since different beams in the same polarization cover different ranges, the terminal device can only receive a few beams in the same polarization, and the beam energy of the port of the reference signal of the second resource block is mainly From the few beams, the reference signal of the second resource block is used to further detect the beam quality of the identified few beams with better beam quality in the second resource block, so that the number of ports of the second resource block is less than The number of ports of the first resource block, thereby further reducing the overhead of the network device transmitting the beam reference signal and the PBCH reference signal.

In a further implementation of the third aspect, each of the first resource blocks further carries a PBCH reference signal.

In still another implementation of the third aspect, the reference signals in the plurality of first resource blocks are set in at least one of the following: time division, frequency division, and code division, and the plurality of second resource blocks The reference signal in is set in at least one of the following ways: time division, frequency division, and code division.

In still another implementation of the third aspect, the at least one OFDM symbol further includes a synchronization signal.

In still another implementation of the third aspect, the multiple first resource blocks and the plurality of second resource blocks are combined into a plurality of third resource blocks, where the beams are in the multiple third resource blocks The reference signal and the PBCH reference signal are interleaved in the frequency domain.

In a fourth aspect, a terminal device is provided, the terminal device having a function of implementing the behavior of the terminal device in the foregoing method. The functions may be implemented by hardware or by corresponding software implemented by hardware. The hardware or software includes one or more modules corresponding to the functions described above.

In a possible implementation manner, the terminal device includes:

a receiving unit, configured to receive, by the network device, at least one orthogonal frequency division multiplexing OFDM symbol that is sent by using a transmit beam, where the at least one OFDM symbol includes multiple first resource blocks and multiple second resource blocks, where the multiple The first resource block and the reference signal of the plurality of second resource blocks have different port numbers and/or port numbers, wherein each first resource block Carrying a beam reference signal, each of which carries a physical broadcast channel PBCH reference signal;

An identifying unit, configured to identify, according to the beam reference signal carried by each of the first resource blocks, multiple beams sent by the network device;

And a demodulation unit, configured to demodulate data in the at least one OFDM symbol according to the PBCH reference signal.

In another possible implementation, the terminal device includes: a receiver, a transmitter, a memory, and a processor; wherein the memory stores a set of program codes, and the processor is configured to call the program code stored in the memory, and execute the following operating:

Receiving, by the receiver, at least one orthogonal frequency division multiplexing OFDM symbol that is sent by the network device by using a transmit beam, where the at least one OFDM symbol includes multiple first resource blocks and multiple second resource blocks, where the multiple The first resource block and the reference signal of the plurality of second resource blocks have different port numbers and/or port numbers, wherein each first resource block carries a beam reference signal, and each second resource block carries a physical Broadcast channel PBCH reference signal;

Identifying, according to the beam reference signal carried by each of the first resource blocks, multiple beams sent by the network device;

Demodulating data in the at least one OFDM symbol according to the PBCH reference signal.

DRAWINGS

1 is a schematic diagram of a transmission configuration of a PBCH reference signal and a beam reference signal in the prior art;

2 is a schematic diagram of interaction between sending and receiving of an OFDM symbol according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of interaction between sending and receiving of another OFDM symbol according to an embodiment of the present disclosure;

4 is a schematic diagram of transmission configuration of a PBCH reference signal and a beam reference signal according to an example of an embodiment of the present invention;

FIG. 5 is a schematic diagram of a transmission configuration of another PBCH reference signal and a beam reference signal according to an example of an embodiment of the present invention; FIG.

6 is a schematic diagram of transmission configuration of another PBCH reference signal and a beam reference signal according to an example of the embodiment of the present invention;

FIG. 7 is a schematic diagram of a transmission configuration of another PBCH reference signal and a beam reference signal according to an example of an embodiment of the present invention; FIG.

FIG. 8 is a schematic diagram of a transmission configuration of another PBCH reference signal and a beam reference signal according to an example of an embodiment of the present invention; FIG.

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

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

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

FIG. 12 is a schematic structural diagram of another network device according to an embodiment of the present disclosure;

FIG. 13 is a schematic structural diagram of still another terminal device according to an 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 via a Radio Access Network (RAN), and the terminal device may refer to an access terminal, a subscriber unit, a subscriber station, a mobile station, and a mobile station. , remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device. The access terminal may be a cellular phone, a cordless phone, a Session Initiation Protocol ("SSIP") phone, a Wireless Local Loop (WLL) station, a personal digital office. Personal Digital Assistant ("PDA"), a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, a UE in a future 5G network, and the like.

The network device in the embodiment of the present invention may be used to communicate with a terminal device, where the network device may be, for example, a base station (Base Transceiver Station, or "BTS") in a GSM system or a CDMA system, or may be a WCDMA system. a base station (NodeB, abbreviated as "NB"), and may also be an evolved base station (Evolutional Node B, "eNB" or "eNodeB") in the LTE system, or the network device may be a relay station, an access point, In-vehicle devices, wearable devices, wireless-Fidelity (Wi-Fi) stations, base stations that can be next-generation communications, such as 5G base stations, small stations, micro stations, or TRP (transmission reception point, Transmission receiving point); it can also be a relay station, an access point, an in-vehicle device, a wearable device, etc. that operate in a high frequency band.

Referring to FIG. 2, FIG. 2 is a schematic diagram of interaction between sending and receiving of an OFDM symbol according to an embodiment of the present invention. The method includes the following steps:

S101. The network device generates at least one orthogonal frequency division multiplexing OFDM symbol.

The network device needs to broadcast the system information to the terminal device through the PBCH, and the terminal device accesses the network and updates the network side system information, where the system information includes some configurations of the network, such as system characteristics, and the system information is useful data of the PBCH, the system Information is carried by OFDM symbols. In addition, when the high frequency band is introduced for communication, the narrowband beam is scanned by the network device and transmitted to the terminal device. The terminal device needs to identify the beams, determine which narrow beams are sent by the network device, and feed back to the network device. Therefore, a beam reference signal is needed to help the terminal device identify multiple beams transmitted by the network device, and a PBCH reference signal is required to demodulate the data of the PBCH, and the beam reference signal and the PBCH reference signal are also included in the OFDM symbol. Therefore, one or more OFDM symbols include at least a beam reference signal, a PBCH reference signal, and PBCH useful data. Optionally, the at least one OFDM symbol further includes a synchronization signal, such as a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS).

In this embodiment, the generated one or more OFDM symbols include a plurality of first resource blocks and a plurality of second resource blocks, and the ports of the plurality of first resource blocks and the reference signals of the plurality of second resource blocks The number of the first resource block and the reference signal of the plurality of second resource blocks are different, and may also be reference signals of the multiple first resource blocks and the multiple second resource blocks. The number of ports and port number are different.

Each of the first resource blocks carries a beam reference signal, where the beam reference signal is used by the terminal device to identify multiple beams sent by the network device; each second resource block carries a physical broadcast channel PBCH reference signal, and the PBCH reference signal Used to demodulate PBCH data. In this embodiment, the network device only carries the beam reference signal through the plurality of first resource blocks, and carries the PBCH reference signal through the plurality of second resource blocks, and is used as the demodulation of the PBCH data, thereby satisfying the beam identification and the PBCH data. At the same time of demodulation, the overhead of transmitting the beam reference signal and the PBCH reference signal is reduced.

As an implementation manner, the number of ports of the second resource block is less than the number of ports of the first resource block. In this implementation manner, the number of ports of the second resource block is less than the number of ports of the first resource block, thereby further saving signaling overhead in the second resource block.

Optionally, the beam reference signal carried in the first resource block is further used to demodulate PBCH data. In this way, both the first resource block and the reference signal in the second resource block can be used to demodulate the PBCH data.

Further, the reference signals in the plurality of first resource blocks may be set in at least one of the following manners: time division, frequency division, and code division, and the reference signals in the plurality of second resource blocks may be performed in at least one of the following manners Settings: time division, frequency division and code division. In this way, the reference signals in the two types of resource blocks are multiplexed in various ways, and may be any one of time division, frequency division, code division, or a combination of any two or a combination of the three.

S102. The network device sends the at least one OFDM symbol by using a transmit beam.

After the network device generates one or more OFDM symbols, the one or more OFDM symbols are transmitted by the transmit beam to the terminal device. The method of sending may be broadcast or unicast. In this embodiment, the network device may generate one OFDM symbol, where multiple first resource blocks and multiple second resource blocks are located in one OFDM symbol, and the network device may also generate multiple OFDM symbols, that is, the first resource block and the first resource block. Two resource blocks can span multiple symbols, but each symbol is transmitted using a transmit beam. The terminal device receives at least one OFDM symbol transmitted by the network device by using a transmit beam.

S103. The terminal device identifies, according to the beam reference signal carried by each of the first resource blocks, multiple beams sent by the network device.

After receiving, by the terminal device, one or more OFDM symbols from the network device, since the plurality of first resource blocks in the symbol carry a beam reference signal, the beam reference signal is used by the terminal device to identify multiple beams sent by the network device, The terminal device can identify multiple beams sent by the network device according to the beam reference signal carried by each first resource block. Specifically, each first resource block carries multiple beam reference signals, so that multiple beams transmitted by the network device can be identified. The specific identification process can refer to the prior art.

S104. The terminal device demodulates data in the at least one OFDM symbol according to the PBCH reference signal.

Meanwhile, in the one or more OFDM symbols received by the terminal device, the plurality of second resource blocks carry the PBCH reference signal, and the PBCH reference signal is used to demodulate the PBCH data, and therefore, the terminal device carries according to each second resource block. The PBCH reference signal can demodulate the PBCH data carried in the symbol. The specific demodulation process can refer to the prior art.

According to the technical solution of the embodiment of the present invention, one or more OFDM symbols generated and transmitted by the network device include two types of resource blocks, and only one type of resource block carries a beam reference signal, and another type of resource block carries a PBCH reference. a signal, the terminal device receives the one or more OFDM symbols, and identifies, according to the beam reference signal carried in the resource block of the one of the one or more OFDM symbols, multiple beams sent by the network device, according to the one or more OFDM The PBCH reference signal carried in another type of resource block in the symbol demodulates data in one or more OFDM symbols, and can simultaneously satisfy beam identification and demodulation of PBCH data, and network device side transmits beam reference signal and The overhead of the PBCH reference signal is greatly reduced.

Referring to FIG. 3, FIG. 3 is a schematic diagram of interaction between sending and receiving of another OFDM symbol according to an embodiment of the present invention. The method includes the following steps:

S201. The network device generates at least one orthogonal frequency division multiplexing OFDM symbol.

Each of the first resource blocks carries a beam reference signal, where the beam reference signal is used by the terminal device to identify multiple beams sent by the network device; each second resource block carries a physical broadcast channel PBCH reference signal. The reference signal of the PBCH is used to demodulate the PBCH data.

Optionally, the number of ports of the second resource block is less than the number of ports of the first resource block.

Optionally, the beam reference signal carried in the first resource block is further used to demodulate PBCH data.

Further, the reference signals in the plurality of first resource blocks are set in at least one of the following: time division, frequency division sum, code division, and reference signals in the plurality of second resource blocks are at least One way to set: time division, frequency division and code division. The reference signals in the two types of resource blocks are multiplexed in various ways, and may be any one of time division, frequency division, code division, or a combination of any two or a combination of the three.

Optionally, the at least one OFDM symbol further includes a synchronization signal, such as a primary synchronization signal and a secondary synchronization signal.

S202. The network device sends the at least one OFDM symbol by using a transmit beam.

In this embodiment, the network device uses the same transmit beam to transmit multiple OFDM symbols to ensure channel consistency.

In another embodiment, multiple OFDM symbols may also be transmitted using different transmit beams.

S203. The terminal device identifies, according to the beam reference signal carried by each of the first resource blocks, multiple beams sent by the network device.

S204. The terminal device demodulates data in the at least one OFDM symbol according to the PBCH reference signal.

Steps S201 to S204 are the same as steps S101 to S104 of the foregoing embodiment, and details are not described herein again. Different from the foregoing embodiment, the embodiment further includes the following steps S205 and S206:

S205. The terminal device detects, according to the beam reference signal carried in each of the first resource blocks, a beam quality of the identified multiple beams in each of the first resource blocks.

When a high frequency band is introduced for communication, a plurality of narrow beams are scanned by the network device and transmitted to the terminal device, and the terminal device needs to identify multiple beams sent by the network device. At the same time, the terminal device measures the quality of the narrow beams, determines which narrow beams are sent by the network device, and feeds back to the network side device.

In this embodiment, the beam reference signals carried in the multiple first resource blocks may be used to detect the beam quality of the identified multiple beams in each of the first resource blocks, and the terminal device is configured according to each of the first resource blocks. And transmitting, by the beam reference signal, the beam quality of the identified multiple beams in each of the first resource blocks. Optionally, the beam reference signal can also be used as a PBCH reference signal for demodulating PBCH data.

S206. The terminal device detects, according to the PBCH reference signal carried in each of the second resource blocks, a beam quality of the identified multiple beams in each of the second resource blocks.

Further, the PBCH reference signal carried in each second resource block may be used for demodulating the PBCH data, and may also be used to measure the quality of the better quality beam in each of the first resource blocks. Further modified in the second resource block, the terminal device detects, according to the PBCH reference signal carried in each of the second resource blocks, the beam quality of the identified multiple beams in each of the second resource blocks, thereby implementing Full-band detection of beam quality is performed in a plurality of first resource blocks and a plurality of second resource blocks, thereby further ensuring the quality of the detected beams.

The solution of the embodiment of the present invention is described in further detail below by two specific examples:

Referring to FIG. 4, FIG. 4 is a schematic diagram of a PBCH reference signal and a beam reference signal transmission configuration according to an example of an embodiment of the present invention. In FIG. 4, in the same OFDM symbol, two types of PBCH resource blocks, namely, PBCH1 and PBCH2, are included, and the antenna ports for transmitting reference signals in each resource block are different, for example, different port numbers and/or port numbers. different. It should be noted that other non-PBCH resource blocks may be located in other OFDM symbols, or may be located in the same OFDM symbol as PBCH1 and PBCH2, and the non-PBCH resource block includes a synchronization signal, for example, PSS/SSS. A resource block can include multiple resource particles.

In this example, it is assumed that the network device can transmit dual-polarized beams, each of which transmits 4 beams, polarization 1

transmission beams

0, 2, 4, 6, and polarization 2

transmission beams

1, 3, 5, 7. Since different beams in the same polarization cover different directions, the terminal device can only receive one beam in the same polarization (determined by the actual scene), and the signal quality of other beams is too poor to be ignored.

The reference signal antenna ports of the 8 REs in PBCH1 are ports 0-7, and the reference signal antenna ports of the 2 REs in PBCH2 are port 8 and port 9 (ie, the number of ports and port numbers of PBCH1 and PBCH2 are different). Eight different beams are simultaneously transmitted in one OFDM symbol, and each of the antenna ports 0-7 corresponds to one beam. Antenna port 8 transmits

beams

0, 2, 4, 6, which are beams of polarization 1. Antenna port 9 transmits

beams

1, 3, 5, 7, which are beams of polarization 2. As shown in FIG. 4, the reference signals in antenna ports 0-7 and

antenna ports

8, 9 can be performed by any one of time division, frequency division, code division, any combination of two, or a combination of three. Settings.

In this example, the resource particles 1-8 in the PBCH1 resource block can function as a beam reference signal, that is, the terminal device identifies the beam (identification beam 0-7) transmitted by the network device and detects which beam quality is better. It is assumed here that at most two beams are of good quality, such as beam 2 and beam 3. Since most of the beam energy of antenna port 8 comes from beam 2, most of the energy of antenna port 9 comes from beam 3, and the detected beam 2 and beam 3 can be further detected by

resource particles

1 and 2 in the PBCH 2 resource block. The beam quality in PBCH2 is corrected to ensure full-band beam quality detection in all PBCH resource blocks. At the same time, the reference signal of each PBCH resource block (including PBCH1 and PBCH2) can be used as a PBCH reference signal for demodulation of PBCH data. Therefore, this example can simultaneously satisfy the functions of PBCH demodulation and full-band beam quality detection. In PBCH2, only two REs are needed to transmit the reference signal, and the signaling overhead is reduced from 8/12 of the prior art to 2/12.

For the transmission configuration of the PBCH reference signal and the beam reference signal illustrated in FIG. 4, alternatively, the two types of PBCH resource blocks may also span multiple symbols, that is, included in multiple OFDM symbols, as shown in FIG. FIG. 5 is a schematic diagram of a transmission configuration of another PBCH reference signal and a beam reference signal according to an example of an embodiment of the present invention. In FIG. 5, if two types of resource blocks adopt time division, or time division and frequency division/code division multiplexing, the two types of resource blocks span

symbols

1 and 2.

Please refer to FIG. 6. FIG. 6 is a schematic diagram of another PBCH reference signal and a beam reference signal transmission configuration according to an example of an embodiment of the present invention. In Figure 6, it is assumed that the network device can transmit dual-polarized beams, each of which transmits 4 beams, polarization 1

transmission beams

0, 2, 4, 6, and polarization 2

transmission beams

1, 3, 5, 7. Since different beams in the same polarization cover different directions, it is assumed that the terminal device can only receive at most two beams in the same polarization (determined by the actual scene), and other beam qualities are too poor to be ignored. For example, the beam that can be received is: one of

beams

0, 2, one of 4, 6, one of 1, 3, one of 5, 7.

In this example, the beam reference signal and the PBCH reference signal are respectively placed in different resource blocks, ie, RS resource blocks and PBCH resource blocks.

In the RS resource block, the RS resource block contains 24 REs (three groups of resource particles with labels 1 to 8, where the number of REs is only an example, and the number of REs is not limited), and is only used to transmit beam reference. The signal is numbered according to the serial number of the three groups of 0-7. The reference signal antenna port corresponding to the beam reference signal is 0-7. It is supported to transmit 8 different beams simultaneously in one symbol, and each of the antenna ports 0-7 corresponds to one beam. As shown in FIG. 5, the reference signals of antenna ports 0-7 can be set by frequency division or code division. Beams 0 to 7 can be identified by the beam reference signal and which 4 beams are better detected, such as

beams

2, 3, 5, 6.

In the PBCH resource block, the PBCH resource block includes 4 REs, which are used to transmit PBCH reference signals (such as resource particles labeled 1 to 4 in the figure), and the other 8 REs are used to transmit PBCH data. The PBCH reference signal can further correct the

better quality beam

2, 3, 5, and 6 detected by the beam reference signal in the RS resource block in the PBCH resource block, that is, perform full-band beam quality detection. Antenna port 8 transmits

beams

0, 2 and antenna port 9 transmits

beams

4, 6. Antenna port 10 transmits

beams

1, 3, antenna port 11 transmits

beams

5, 7, and most of the beam energy of antenna port 8 comes from beam 2, and most of the energy of antenna port 9 comes from beam 6, most of the beam of port 10. The energy comes from beam 3, and most of the energy of antenna port 11 comes from beam 5, so the quality of

beams

2, 3, 5, 6 can be detected in the PBCH resource block by the PBCH reference signal in the PBCH resource block.

At the same time, the PBCH reference signal of each PBCH resource block can be used for demodulation of PBCH data. Therefore, this example can simultaneously satisfy the functions of PBCH demodulation and full-band beam quality detection. The signaling overhead of the transmission reference signal in the PBCH resource block has been reduced from 8/12 to 4/12.

For the transmission configuration of the PBCH reference signal and the beam reference signal illustrated in FIG. 6, alternatively, the two types of resource blocks may also span multiple symbols, that is, included in multiple OFDM symbols, as shown in FIG. 7, FIG. 7 is A schematic diagram of a transmission configuration of still another PBCH reference signal and a beam reference signal according to an embodiment of the present invention. In FIG. 7, if two types of resource blocks adopt time division, or time division and frequency division/code division multiplexing, the two types of resource blocks span

symbols

1 and 2.

In an implementation manner, the multiple first resource blocks and the multiple second resource blocks are combined into multiple third resource blocks, where the beam reference signal and the PBCH are in the multiple third resource blocks. The reference signals are interleaved in the frequency domain.

In this implementation, the beam reference signal and the PBCH reference signal can be set in one resource block. Please refer to FIG. 8. FIG. 8 is a schematic diagram of another PBCH reference signal and a beam reference signal transmission configuration according to an embodiment of the present invention. In FIG. 8, the PBCH reference signal and the beam reference signal are concentrated in one resource block, where the PBCH reference is used. The signal and beam reference signals are interleaved in the frequency domain.

According to the technical solution of the embodiment of the present invention, one or more OFDM symbols generated and transmitted by the network device include two types of resource blocks, and only one type of resource block carries a beam reference signal, and another type of resource block carries a PBCH reference. a signal, the terminal device receives the one or more OFDM symbols, and identifies, according to the beam reference signal carried in the resource block of the one of the one or more OFDM symbols, multiple beams sent by the network device, according to the one or more OFDM The PBCH reference signal carried in another type of resource block in the symbol demodulates data in one or more OFDM symbols, and can simultaneously satisfy beam identification and demodulation of PBCH data, and network device side transmits beam reference signal and The overhead of the PBCH reference signal is greatly reduced; the terminal device performs full-band beam quality detection on two types of resource blocks included in one or more OFDM symbols for multiple beams identified by multiple types of resource blocks, thereby ensuring detection The quality of the beam.

It should be noted that, for the foregoing method embodiments, for the sake of simple description, they are all expressed as a series of action combinations, but those skilled in the art should understand that the present invention is not limited by the described action sequence. Because certain steps may be performed in other sequences or concurrently in accordance with the present invention.

Referring to FIG. 9, FIG. 9 is a schematic structural diagram of a network device according to an embodiment of the present invention. The network device 1000 includes: a generating unit 11 and a sending unit 12; wherein:

The generating unit 11 is configured to generate at least one OFDM symbol.

The network device needs to broadcast the system information to the terminal device through the PBCH, and the terminal device accesses the network and updates the network side system information, where the system information includes some configurations of the network, such as system characteristics, and the system information is used as PBCH useful data, the system information is carried by OFDM symbols. In addition, when the high frequency band is introduced for communication, the narrowband beam is scanned by the network device and transmitted to the terminal device. The terminal device needs to identify the beams, determine which narrow beams are sent by the network device, and feed back to the network device. Therefore, a beam reference signal is needed to help the terminal device identify multiple beams transmitted by the network device, and a PBCH reference signal is required to demodulate the data of the PBCH, and the beam reference signal and the PBCH reference signal are also included in the OFDM symbol. Therefore, one or more OFDM symbols include at least a beam reference signal, a PBCH reference signal, and PBCH useful data. Optionally, the at least one OFDM symbol further includes a synchronization signal, such as a primary synchronization signal and a secondary synchronization signal.

In this embodiment, the one or more OFDM symbols generated by the generating unit 11 include a plurality of first resource blocks and a plurality of second resource blocks, and the reference of the multiple first resource blocks and the multiple second resource blocks The number of ports of the signal is different, and the port numbers of the reference signals of the multiple first resource blocks and the multiple second resource blocks are different, and may be multiple first resource blocks and the multiple second resource blocks. The reference signal has a different number of ports and port numbers. Each of the first resource blocks carries a beam reference signal, where the beam reference signal is used by the terminal device to identify multiple beams sent by the network device; each second resource block carries a physical broadcast channel PBCH reference signal, and the PBCH reference signal Used to demodulate PBCH data. In this embodiment, the network device only carries the beam reference signal through the plurality of first resource blocks, and carries the PBCH reference signal through the plurality of second resource blocks, and is used as the demodulation of the PBCH data, thereby satisfying the beam identification and the PBCH data. At the same time of demodulation, the overhead of transmitting the beam reference signal and the PBCH reference signal is reduced.

In another implementation manner, the multiple first resource blocks and the multiple second resource blocks are combined into multiple third resource blocks, in the multiple third resource blocks, the beam reference signal and the The PBCH reference signals are interleaved in the frequency domain.

The sending unit 12 is configured to send, by using a transmit beam, the at least one OFDM symbol generated by the generating unit.

After the generating unit 11 generates one or more OFDM symbols, the transmitting unit 12 transmits the one or more OFDM symbols to the terminal device by using a transmitting beam. The method of sending may be broadcast or unicast. In this embodiment, the generating unit 11 may generate one OFDM symbol, where multiple first resource blocks and multiple second resource blocks are located in one OFDM symbol, and the generating unit 11 may also generate multiple OFDM symbols, that is, the first resource block. And the second resource block can span multiple symbols, but each symbol is transmitted using a transmit beam.

In this embodiment, the sending unit 12 transmits multiple OFDM symbols by using the same transmit beam to ensure channel consistency.

In another embodiment, the transmitting unit 12 may also transmit multiple OFDM symbols by using different transmit beams.

A network device, one or more OFDM symbols generated and transmitted by a network device, according to an embodiment of the present invention The number is divided into two types of resource blocks, and only one type of resource block carries a beam reference signal, and the resource block can be used as a beam identification, and another type of resource block carries a PBCH reference signal, which can be used as PBCH data. Demodulation, thereby reducing the overhead of transmitting the beam reference signal and the PBCH reference signal while satisfying beam identification and demodulation of PBCH data.

Referring to FIG. 10, FIG. 10 is a schematic structural diagram of a terminal device according to an embodiment of the present invention. The terminal device 2000 includes: a receiving unit 21, an identifying unit 22, and a demodulating unit 23; wherein:

The receiving unit 21 is configured to receive one or more OFDM symbols that are sent by the network device by using a transmit beam.

The one or more OFDM symbols received by the receiving unit 21 include at least a beam reference signal, a PBCH reference signal, and PBCH useful data. Optionally, the one or more OFDM symbols further include a synchronization signal, such as a primary synchronization signal and a secondary synchronization signal.

In this embodiment, the one or more OFDM symbols include a plurality of first resource blocks and a plurality of second resource blocks, and the number of ports of the reference signals of the plurality of first resource blocks and the plurality of second resource blocks are different The port number of the reference signal of the multiple first resource blocks and the multiple second resource blocks may be different, and may also be the ports of the reference signals of the multiple first resource blocks and the multiple second resource blocks. The number and port number are different.

Each of the first resource blocks carries a beam reference signal, where the beam reference signal is used by the terminal device to identify multiple beams sent by the network device; each second resource block carries a physical broadcast channel PBCH reference signal, and the PBCH reference signal Used to demodulate PBCH data.

Further, the reference signals in the plurality of first resource blocks may be set in at least one of the following manners: time division, frequency division, and code division, and the reference signals in the plurality of second resource blocks may be performed in at least one of the following manners Settings: time division, frequency division and code division.

The identifying unit 22 is configured to identify multiple beams sent by the network device according to the beam reference signal carried by each of the first resource blocks.

After receiving the one or more OFDM symbols from the network device, the receiving unit 21 carries a beam reference signal, and the beam reference signal is used by the terminal device to identify multiple beams sent by the network device, Therefore, the identification unit 22 can identify multiple beams transmitted by the network device according to the beam reference signal carried by each of the first resource blocks. Specifically, each first resource block carries multiple beam reference signals, so that multiple beams transmitted by the network device can be identified. The specific identification process can refer to the prior art.

The demodulation unit 23 is configured to demodulate data in the at least one OFDM symbol according to the PBCH reference signal.

Meanwhile, among the one or more OFDM symbols received by the receiving unit 22, the plurality of second resource blocks carry the PBCH reference signal, and the PBCH reference signal is used to demodulate the PBCH data, and therefore, the demodulation unit 23 is configured according to each second. Capital The PBCH reference signal carried by the source block can demodulate the PBCH data carried in the symbol. The specific demodulation process can refer to the prior art.

According to an embodiment of the present invention, in a terminal device, one or more OFDM symbols from a network device received by a terminal device, the one or more OFDM symbols are divided into two types of resource blocks, and the beam is carried by only one type of resource block. a reference signal, the other type of resource block carries a PBCH reference signal, and the terminal device identifies, according to the beam reference signal carried in the resource block of the one or more OFDM symbols, the multiple beams sent by the network device, according to the one or The PBCH reference signal carried in another type of resource block of the plurality of OFDM symbols demodulates data in one or more OFDM symbols, and simultaneously satisfies beam identification and demodulation of PBCH data, and network device side transmission beam The overhead of the reference signal and the PBCH reference signal is greatly reduced.

Referring to FIG. 11, FIG. 11 is a schematic structural diagram of another terminal device according to an embodiment of the present invention. The terminal device 3000 includes: a receiving unit 31, an identifying unit 32, a demodulating unit 33, a first detecting unit 34, and a second detecting unit 35; wherein:

The receiving unit 31 is configured to receive, by the network device, at least one OFDM symbol that is sent by using a transmit beam.

The identifying unit 32 is configured to identify multiple beams sent by the network device according to the beam reference signal carried by each of the first resource blocks.

The demodulation unit 33 is configured to demodulate data in the at least one OFDM symbol according to the PBCH reference signal.

The functions of the receiving unit 31, the identifying unit 32, and the demodulating unit 33 are the same as those of the receiving unit 21, the identifying unit 22, and the demodulating unit 23 of the foregoing embodiment, and are not described herein again. Different from the foregoing embodiment, the embodiment further includes a first detecting unit 34 and a second detecting unit 35:

The first detecting unit 34 is configured to detect, according to the beam reference signal carried in each of the first resource blocks, a beam quality of the multiple beams identified by the identifying unit in each of the first resource blocks.

In this embodiment, the beam reference signals carried in the multiple first resource blocks may be used to detect the beam quality of the identified multiple beams in each of the first resource blocks, and the first detecting unit 34 is configured according to each A beam reference signal carried in a resource block, detecting a beam quality of the plurality of beams identified by the identifying unit in each of the first resource blocks. Optionally, the beam reference signal can also be used as a PBCH reference signal for demodulating PBCH data.

The second detecting unit 35 is configured to detect, according to the PBCH reference signal carried in each of the second resource blocks, a beam quality of the multiple beams identified by the identifying unit in each of the second resource blocks.

Further, the PBCH reference signal carried in each second resource block may be used for demodulating the PBCH data, and may also be used to measure the quality of the better quality beam in each of the first resource blocks. Further modified in the second resource block, the second detecting unit 35 detects, according to the PBCH reference signal carried in each of the second resource blocks, a beam of the plurality of beams identified by the identifying unit in each of the second resource blocks. The quality thus enables full-band detection of beam quality in a plurality of first resource blocks and a plurality of second resource blocks, thereby further ensuring the quality of the detected beam.

According to an embodiment of the present invention, in a terminal device, one or more OFDM symbols from a network device received by a terminal device, the one or more OFDM symbols are divided into two types of resource blocks, and the beam is carried by only one type of resource block. Reference The test signal carries a PBCH reference signal in another type of resource block, and the terminal device identifies, according to the beam reference signal carried in the resource block of the one or more OFDM symbols, the multiple beams sent by the network device, according to the one or The PBCH reference signal carried in another type of resource block of the plurality of OFDM symbols demodulates data in one or more OFDM symbols, and simultaneously satisfies beam identification and demodulation of PBCH data, and network device side transmission beam The overhead of the reference signal and the PBCH reference signal is greatly reduced; the terminal device performs full-band beam quality detection on two types of resource blocks included in one or more OFDM symbols for multiple beams identified by multiple types of resource blocks, Guarantee the quality of the detected beam.

Referring to FIG. 12, FIG. 12 is a schematic structural diagram of another network device according to an embodiment of the present invention. The network device 4000 may include a transmitter 41, a receiver 42, a processor 43, and a memory 44, and a transmitter 41 and a receiver. 42. The processor 43 and the memory 44 are connected to the bus 45, respectively.

The processor 43 controls the operation of the network device 4000, which may also be referred to as a Central Processing Unit (CPU). Processor 43 may be an integrated circuit chip with signal processing capabilities. The processor 43 can also be a general-purpose processor, a digital signal processing (DSP), an application specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or the like. Programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The general purpose processor may be a microprocessor or the processor or any conventional processor or the like.

The memory 44 stores a set of program codes, and the processor 43 is configured to call the program code stored in the memory 44 for performing the following operations:

Generating at least one orthogonal frequency division multiplexing OFDM symbol;

In this implementation manner, one or more OFDM symbols generated and transmitted by the network device are divided into two types of resource blocks, and the beam reference signals are carried by only one type of resource blocks, and the resource blocks can be used as beam identification. The other type of resource block carries the PBCH reference signal, which can be used as the demodulation of the PBCH data, thereby reducing the overhead of transmitting the beam reference signal and the PBCH reference signal while satisfying the beam identification and the demodulation of the PBCH data.

In an implementation manner, the beam reference signal carried in each of the first resource blocks is further used to detect a beam quality of the identified multiple beams in each of the first resource blocks, where each second The PBCH reference signal carried in the resource block is further used by the terminal device to detect a beam quality of the identified multiple beams in each of the second resource blocks.

In this implementation manner, performing full-band beam quality detection on two types of resource blocks included in one or more OFDM symbols for multiple beams identified by multiple types of resource blocks, thereby ensuring the quality of the detected beam .

In another implementation manner, the number of ports of the second resource block is less than the number of ports of the first resource block.

In this implementation manner, since different beams in the same polarization cover different ranges, the terminal device can only receive a few beams in the same polarization, and the beam energy of the port of the reference signal of the second resource block is mainly From the few beams, the reference signal of the second resource block is used to further detect a few well-identified waves with better beam quality. The beam quality in the second resource block is bundled such that the number of ports of the second resource block is less than the number of ports of the first resource block, thereby saving signaling overhead in the second resource block.

In still another implementation, the beam reference signal carried in the first resource block is further used to demodulate PBCH data.

In still another implementation, the reference signals in the plurality of first resource blocks are set in at least one of: time division, frequency division, and code division, and reference signals in the plurality of second resource blocks. Set in at least one of the following ways: time division, frequency division, and code division.

In yet another implementation, the at least one OFDM symbol further includes a synchronization signal.

In still another implementation, the multiple first resource blocks and the multiple second resource blocks are combined into a plurality of third resource blocks, where the beam reference signal and the The PBCH reference signals are interleaved in the frequency domain.

According to the network device provided by the embodiment of the present invention, one or more OFDM symbols generated and transmitted by the network device are divided into two types of resource blocks, and the beam reference signals are carried by only one type of resource blocks, and the resource blocks may be used. Used as the identification of the beam, and another type of resource block carries the PBCH reference signal, which can be used as the demodulation of the PBCH data, thereby reducing the transmission beam reference signal and the PBCH reference while satisfying the beam identification and the demodulation of the PBCH data. The overhead of the signal.

Referring to FIG. 13, FIG. 13 is a schematic structural diagram of still another terminal device according to an embodiment of the present invention. The terminal device 5000 may include a transmitter 51, a receiver 52, a processor 53, and a memory 54, a transmitter 51, and a receiver. 52. The processor 53 and the memory 54 are connected to the bus 55, respectively.

The processor 53 controls the operation of the terminal device 5000, which may also be referred to as a central processing unit. Processor 53 may be an integrated circuit chip with signal processing capabilities. Processor 53 may also be a general purpose processor, digital signal processor, application specific integrated circuit, field programmable gate array or other programmable logic device, discrete gate or transistor logic device, discrete hardware component. The general purpose processor may be a microprocessor or the processor or any conventional processor or the like.

The memory 54 stores a set of program codes, and the processor 53 is configured to call the program code stored in the memory 54 for performing the following operations:

Receiving, by the receiver, at least one OFDM symbol that the network device transmits by using a transmit beam, where the at least one OFDM symbol includes a plurality of first resource blocks and a plurality of second resource blocks, and the plurality of first resource blocks and The port number and/or the port number of the reference signal of the plurality of second resource blocks are different, wherein each of the first resource blocks carries a beam reference signal, and each of the second resource blocks carries a physical broadcast channel PBCH reference signal;

In this implementation manner, in one or more OFDM symbols received by the terminal device from the network device, the one or more OFDM symbols are divided into two types of resource blocks, and only one type of resource block carries a beam reference signal, and the other type Resource block The PBCH reference signal is carried in the terminal device, and the terminal device identifies multiple beams sent by the network device according to the beam reference signal carried in the resource block, and the PBCH reference signal carried in the other resource block is used in one or more OFDM symbols. The data is demodulated, which can simultaneously satisfy the beam identification and the demodulation of the PBCH data, and the overhead of transmitting the beam reference signal and the PBCH reference signal on the network device side is greatly reduced.

In an implementation, the processor 53 is further configured to perform the following operations:

In this implementation manner, the terminal device performs full-band beam quality detection on two types of resource blocks included in one or more OFDM symbols for multiple beams identified by multiple types of resource blocks, thereby ensuring the detected beam. the quality of.

In still another implementation, each of the first resource blocks further carries a PBCH reference signal.

In this implementation, one or more OFDM symbols may include synchronization signals, such as primary synchronization signals and/or secondary synchronization signals, in addition to two types of resource blocks.

The terms "first", "second", "third", and "fourth" and the like in the description, the claims, and the drawings of the present invention are used to distinguish different objects, and are not intended to describe a particular order. Furthermore, the terms "comprises" and "comprising" and "comprising" are intended to cover a non-exclusive inclusion. For example, a process, method, system, product, or device that comprises a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units not listed, or alternatively Other steps or units inherent to these processes, methods, systems, products or equipment.

In the above embodiments, the descriptions of the various embodiments are different, and the details that are not detailed in a certain embodiment can be referred to the related descriptions of other embodiments.

Through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be implemented in hardware, firmware implementation, or a combination thereof. When implemented in software, the functions described above may be stored in or transmitted as one or more instructions or code on a computer readable medium. Computer readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one location to another. A storage medium may be any available media that can be accessed by a computer. For example, but not limited to, the computer readable medium may include a random access memory (RAM), a read-only memory (ROM), and an electrically erasable programmable read-only memory (Electrically Erasable Programmable). Read-Only Memory (EEPROM), Compact Disc Read-Only Memory (CD-ROM) or other optical disc storage, disk storage media or other magnetic storage devices, or can be used to carry or store an instruction or data structure. The desired program code and any other medium that can be accessed by the computer. Also. Any connection may suitably be a computer readable medium. For example, if the software is transmitted from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), or wireless technologies such as infrared, radio, and microwave, Then coaxial cable, fiber optic cable, twisted pair, DSL or wireless technologies such as infrared, wireless and microwave are included in the fixing of the associated medium. As used in the present invention, a disk and a disc include a compact disc (CD), a laser disc, a compact disc, a digital versatile disc (DVD), a floppy disk, and a Blu-ray disc, wherein the disc is usually magnetically copied, and the disc is The laser is used to optically replicate the data. Combinations of the above should also be included within the scope of the computer readable media.

Claims

A method for transmitting Orthogonal Frequency Division Multiplexing (OFDM) OFDM symbols, the method comprising:

The network device generates at least one OFDM symbol;

The at least one OFDM symbol includes a plurality of first resource blocks and a plurality of second resource blocks, and the number of ports and/or ports of the reference signals of the plurality of first resource blocks and the plurality of second resource blocks Different numbers;

Each of the first resource blocks carries a beam reference signal, where the beam reference signal is used by the terminal device to identify multiple beams sent by the network device; each second resource block carries a physical broadcast channel PBCH reference signal. The reference signal of the PBCH is used to demodulate the PBCH data;

The network device transmits the at least one OFDM symbol by using a transmit beam.
The method according to claim 1, wherein the beam reference signal carried in each of the first resource blocks is further used to detect a beam quality of the identified plurality of beams in each of the first resource blocks, The PBCH reference signal carried in each of the second resource blocks is further used by the terminal device to detect a beam quality of the identified multiple beams in each of the second resource blocks.
The method of claim 2, wherein the number of ports of the second resource block is less than the number of ports of the first resource block.
The method according to any one of claims 1 to 3, wherein the plurality of first resource blocks and the plurality of second resource blocks are combined into a plurality of third resource blocks, and the plurality of third resources are In the block, the beam reference signal and the PBCH reference signal are staggered in a frequency domain.
A method for receiving an OFDM symbol of an OFDM, characterized in that the method includes:

The terminal device receives at least one OFDM symbol that the network device transmits by using a transmit beam, where the at least one OFDM symbol includes a plurality of first resource blocks and a plurality of second resource blocks, and the plurality of first resource blocks and the multiple The number of ports and/or the port number of the reference signal of the second resource block is different, wherein each of the first resource blocks carries a beam reference signal, and each of the second resource blocks carries a physical broadcast channel PBCH reference signal;

Identifying, by the terminal device, the multiple beams sent by the network device according to the beam reference signal carried by each of the first resource blocks;

The terminal device demodulates data in the at least one OFDM symbol according to the PBCH reference signal.
The method of claim 5, wherein the method further comprises:

The terminal device detects, according to the beam reference signal carried in each of the first resource blocks, a beam quality of the identified multiple beams in each of the first resource blocks;

The terminal device detects, according to the PBCH reference signal carried in each of the second resource blocks, a beam quality of the identified multiple beams in each of the second resource blocks.
The method of claim 6, wherein the number of ports of the second resource block is less than the number of ports of the first resource block.
The method according to any one of claims 5 to 7, wherein the plurality of first resource blocks and the plurality of second resource blocks are combined into a plurality of third resource blocks, and among the plurality of third resource blocks, The beam reference signal and the PBCH reference signal are staggered in the frequency domain.
A network device, where the network device includes:

Generating unit, configured to generate at least one orthogonal frequency division multiplexing OFDM symbol;

The at least one OFDM symbol includes a plurality of first resource blocks and a plurality of second resource blocks, and the number of ports and/or ports of the reference signals of the plurality of first resource blocks and the plurality of second resource blocks Different numbers;

Each of the first resource blocks carries a beam reference signal, where the beam reference signal is used by the terminal device to identify multiple beams sent by the network device; each second resource block carries a physical broadcast channel PBCH reference signal. The reference signal of the PBCH is used to demodulate the PBCH data;

And a sending unit, configured to send, by using a transmit beam, the at least one OFDM symbol generated by the generating unit.
The network device according to claim 9, wherein the beam reference signal carried in each of the first resource blocks is further used to detect a beam quality of the identified plurality of beams in each of the first resource blocks. And the PBCH reference signal carried in each of the second resource blocks is further used by the terminal device to detect a beam quality of the identified multiple beams in each of the second resource blocks.
The network device according to claim 10, wherein the number of ports of the second resource block is less than the number of ports of the first resource block.
The network device according to any one of claims 9 to 11, wherein the plurality of first resource blocks and the plurality of second resource blocks are combined into a plurality of third resource blocks, in the plurality of third In the resource block, the beam reference signal and the PBCH reference signal are staggered in the frequency domain.
A terminal device, the terminal device includes:

a receiving unit, configured to receive, by the network device, at least one orthogonal frequency division multiplexing OFDM symbol that is sent by using a transmit beam, where the at least one OFDM symbol includes multiple first resource blocks and multiple second resource blocks, where the multiple The first resource block and the reference signal of the plurality of second resource blocks have different port numbers and/or port numbers, wherein each first resource block carries a beam reference signal, and each second resource block carries a physical Broadcast channel PBCH reference signal;

An identifying unit, configured to identify, according to the beam reference signal carried by each of the first resource blocks, multiple beams sent by the network device;

And a demodulation unit, configured to demodulate data in the at least one OFDM symbol according to the PBCH reference signal.
The terminal device according to claim 13, wherein the terminal device further comprises:

a first detecting unit, configured to detect, according to the beam reference signal carried in each of the first resource blocks, a beam quality of the multiple beams identified by the identifying unit in each of the first resource blocks;

a second detecting unit, configured to detect, according to the PBCH reference signal carried in each of the second resource blocks, a beam quality of the multiple beams identified by the identifying unit in each of the second resource blocks.
The terminal device according to claim 14, wherein the number of ports of the second resource block is less than the number of ports of the first resource block.
The terminal device according to any one of claims 13 to 15, wherein the plurality of first resource blocks and the plurality of second resource blocks are combined into a plurality of third resource blocks, in the plurality of third In the resource block, the beam reference signal and the PBCH reference signal are staggered in the frequency domain.