CN108418646B

CN108418646B - Sending method, receiving method, related equipment and system of synchronous access signal group

Info

Publication number: CN108418646B
Application number: CN201710073848.0A
Authority: CN
Inventors: 李建军
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2017-02-10
Filing date: 2017-02-10
Publication date: 2020-01-07
Anticipated expiration: 2037-02-10
Also published as: WO2018145531A1; CN108418646A

Abstract

The invention provides a sending method, a receiving method, related equipment and a system of a synchronous access signal group, wherein the method comprises the following steps: transmitting, at a first time resource, the PSS using a first antenna port; transmitting, at a second time resource, the SSS using a first antenna port and/or a second antenna port; transmitting the PBCH signal using the first antenna port and the second antenna port at a third time resource; at a fourth time resource, re-transmitting the PSS using the first antenna port; at a fifth time resource, the SSS is again transmitted using the second antenna port and/or the first antenna port. The embodiment of the invention transmits the PSS and the SSS for multiple times, and can improve the detection performance of the PSS and the SSS.

Description

Sending method, receiving method, related equipment and system of synchronous access signal group

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a sending method, a receiving method, a related device, and a system for a synchronous access signal group.

Background

In a communication system, a user terminal needs to detect a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS) to achieve initial time and frequency Synchronization at initial access, and then detect a Physical Broadcast Channel (PBCH) Signal.

However, the existing network side device usually uses one antenna port to transmit the PSS and the SSS once, and the user terminal performs sequence detection, which results in poor detection performance of the PSS and the SSS.

Disclosure of Invention

The embodiment of the invention provides a sending method, a receiving method, related equipment and a system of a synchronous access signal group, and aims to solve the problem of poor detection performance of a PSS (power system stabilizer) and an SSS (secondary synchronization signal).

In a first aspect, an embodiment of the present invention provides a method for sending a synchronization access signal group, where the synchronization access signal group includes PSS, SSS, and PBCH signals, and the method includes:

transmitting, at a first time resource, the PSS using a first antenna port;

transmitting, at a second time resource, the SSS using a first antenna port and/or a second antenna port;

transmitting the PBCH signal using the first antenna port and the second antenna port at a third time resource;

at a fourth time resource, re-transmitting the PSS using the first antenna port;

at a fifth time resource, the SSS is again transmitted using the second antenna port and/or the first antenna port.

In a second aspect, an embodiment of the present invention further provides a receiving method for a synchronization access signal group, where the synchronization access signal group includes PSS, SSS, and PBCH signals, and the method includes:

detecting the PSS using a third antenna port at a first time resource;

detecting, at a second time resource, the SSS using a third antenna port and/or a fourth antenna port;

detecting the PSS again using a third antenna port at a fourth time resource;

detecting the SSS at a fifth time resource, again using a fourth antenna port and/or a third antenna port;

performing time and frequency synchronization by using the detected PSS and SSS;

performing channel estimation by using the detected SSS to obtain a channel estimation result;

and detecting the PBCH signal by using a third antenna port and a fourth antenna port by using the channel estimation result in a third time resource.

In a third aspect, an embodiment of the present invention further provides a network side device, configured to send synchronization access signals at a synchronized access signal level, where the synchronization access signal group includes PSS, SSS, and PBCH signals, and the network side device includes:

a first transmitting module, configured to transmit the PSS using a first antenna port at a first time resource;

a second sending module, configured to send, at a second time resource, the SSS using the first antenna port and/or the second antenna port;

a third sending module, configured to send the PBCH signal using the first antenna port and the second antenna port at a third time resource;

a fourth sending module, configured to send the PSS again using the first antenna port at a fourth time resource;

a fifth sending module, configured to send the SSS again using the second antenna port and/or the first antenna port at a fifth time resource.

In a fourth aspect, an embodiment of the present invention further provides a user terminal, configured to receive a synchronization access signal group, where the synchronization access signal group includes PSS, SSS, and PBCH signals, and the user terminal includes:

a first detection module for detecting the PSS using a third antenna port at a first time resource;

a second detection module, configured to detect, at a second time resource, the SSS using a third antenna port and/or a fourth antenna port;

a third detection module, configured to detect the PSS again using a third antenna port at a fourth time resource;

a fourth detecting module, configured to detect the SSS using a fourth antenna port and/or a third antenna port again at a fifth time resource;

a synchronization module, configured to perform time and frequency synchronization using the detected PSS and SSS;

the estimation module is used for performing channel estimation by using the detected SSS to obtain a channel estimation result;

a fifth detecting module, configured to detect the PBCH signal using a third antenna port and a fourth antenna port by using the channel estimation result in a third time resource.

Thus, in the embodiment of the present invention, at the first time resource, the PSS is transmitted using the first antenna port; transmitting, at a second time resource, the SSS using a first antenna port and/or a second antenna port; transmitting the PBCH signal using the first antenna port and the second antenna port at a third time resource; at a fourth time resource, re-transmitting the PSS using the first antenna port; and in the fifth time resource, the second antenna port and/or the first antenna port are/is used for sending the SSS again, and the PSS and the SSS are sent for multiple times, so that the detection performance of the PSS and the SSS and the synchronization precision of time and frequency are improved, the overhead of pilot signals is saved, and the spectrum utilization efficiency of the system is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive exercise.

Fig. 1 is a block diagram of a transmission system for synchronizing groups of access signals;

fig. 2 is a flowchart of a method for transmitting a synchronization access signal group according to a first embodiment of the present invention;

fig. 3 is a flowchart of a sending method for synchronizing an access signal group according to a second embodiment of the present invention;

fig. 4 is a schematic diagram illustrating transmission of a set of synchronization access signals according to a second embodiment of the present invention;

fig. 5 is a flowchart of a sending method for synchronizing an access signal group according to a third embodiment of the present invention;

fig. 6 is a schematic diagram illustrating transmission of a set of synchronization access signals according to a third embodiment of the present invention;

fig. 7 is a flowchart of a sending method for synchronizing an access signal group according to a fourth embodiment of the present invention;

fig. 8 is a schematic transmission diagram of another set of synchronization access signals according to a fourth embodiment of the present invention;

fig. 9 is a flowchart of a receiving method for synchronizing an access signal group according to a fifth embodiment of the present invention;

fig. 10 is a flowchart of a receiving method for synchronizing an access signal group according to a sixth embodiment of the present invention;

fig. 11 is a flowchart of a receiving method for synchronizing an access signal group according to a seventh embodiment of the present invention;

fig. 12 is a flowchart of a receiving method for synchronizing an access signal group according to an eighth embodiment of the present invention;

fig. 13 is a block diagram of a network side device according to a ninth embodiment of the present invention;

fig. 14 is a block diagram of a user terminal according to a tenth embodiment of the present invention;

fig. 15 is a block diagram of a network side device according to an eleventh embodiment of the present invention;

fig. 16 is a block diagram of a user terminal according to a twelfth embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, fig. 1 is a structural diagram of a transmission system of a synchronous access signal group, which is applicable to the embodiment of the present invention, and as shown in fig. 1, the transmission system includes a user terminal 11 and a network side device 12, where the user terminal 11 may be a ue (user equipment), for example: the terminal side Device may be a Mobile phone, a Tablet Personal Computer (Tablet Personal Computer), a Laptop Computer (Laptop Computer), a Personal Digital Assistant (PDA), a Mobile Internet Device (MID), or a Wearable Device (Wearable Device), and it should be noted that the specific type of the user terminal 11 is not limited in the embodiments of the present invention. The ue 11 may establish communication with the network-side device 12, where the network in the figure may indicate that the ue 11 wirelessly establishes communication with the network-side device 12, and the network-side device 12 may be a Transmission Reception Point (TRP) or a base station, and the base station may be a macro station, such as an LTE eNB, a 5G NR NB, or the like. Or the network side device 12 may be an Access Point (AP).

It should be noted that, in the embodiment of the present invention, the specific type of the network-side device 12 is not limited, and the specific functions of the user terminal 11 and the network-side device 12 will be described in detail through a plurality of embodiments below.

First embodiment

Referring to fig. 2, fig. 2 is a flowchart of a method for transmitting a synchronization access signal group according to an embodiment of the present invention, where the synchronization access signal group includes PSS, SSS, and PBCH signals, and as shown in fig. 2, the method includes the following steps:

step 201, at a first time resource, using a first antenna port to transmit the PSS.

The first time resource may be one or more Orthogonal Frequency Division Multiplexing (OFDM) symbols in a subframe or a slot. In addition, the first antenna port in step 201 may be any one of the antenna ports included in the network side device.

Step 202, transmitting the SSS using the first antenna port and/or the second antenna port at a second time resource.

The second time resource may be one or more OFDM symbols in a certain subframe or slot. In addition, the SSS may be transmitted using the first antenna port and/or the second antenna port, and may be transmitted using one or both of the first antenna port and the second antenna port at the second time resource.

Step 203, in a third time resource, the PBCH signal is transmitted by using the first antenna port and the second antenna port.

The PBCH signal may include system information, such as: the Master Information Block (MIB) may be other system Information, and the embodiment of the present invention is not limited thereto.

And step 204, at the fourth time resource, using the first antenna port to transmit the PSS again.

The antenna port used in step 204 may be the same antenna port as the antenna port used in step 201.

And 205, in a fifth time resource, using the second antenna port and/or the first antenna port to transmit the SSS again.

In step 205, refer to the corresponding description of step 202, but when step 202 uses the same antenna port to transmit the SSS, step 205 may also use the same antenna port to transmit the SSS, but the antenna port used in step 205 and the antenna port used in step 202 may be different antenna ports.

The PSS and the SSS are sent for multiple times through the steps, so that the detection performance of the PSS and the SSS is improved, and the PSS and the SSS are easier to detect by the user terminal. In addition, after detecting the PSS and the SSS, the user terminal may perform time and frequency synchronization using the detected PSS and SSS, and may also perform channel estimation using the detected SSS to obtain a channel estimation result, and then detect the PBCH signal using the third antenna port and the fourth antenna port using the channel estimation result. If the PBCH signal includes system information, the ue may also demodulate the detected PBCH signal to obtain the system information. The SSS is directly used for channel estimation, so that Cell-specific reference signals (CRS) do not need to be transmitted, the overhead of the CRS can be saved, and the frequency spectrum efficiency is improved.

It should be noted that the method may be applied to a network side device.

It should be noted that, in the embodiment of the present invention, the present invention may be applied to a large-scale Multiple-Input Multiple-output (MIMO) system, a global system for Mobile Communication (GSM) application scenario in a millimeter wave band, and a Code Division Multiple Access (CDMA) application scenario in a millimeter wave band. In the embodiment of the invention, different antenna ports are used for transmitting for multiple times in a GSM or CDMA scene, so that the performance of the system is improved.

In the embodiment of the invention, the PSS is sent by using a first antenna port at a first time resource; transmitting, at a second time resource, the SSS using a first antenna port and/or a second antenna port; transmitting the PBCH signal using the first antenna port and the second antenna port at a third time resource; at a fourth time resource, re-transmitting the PSS using the first antenna port; at a fifth time resource, the SSS is again transmitted using the second antenna port and/or the first antenna port. The PSS and the SSS are transmitted for multiple times, so that the detection performance of the PSS and the SSS and the synchronization precision of time and frequency are improved, the overhead of pilot signals is saved, and the frequency spectrum utilization efficiency of a system is improved.

Second embodiment

Referring to fig. 3, fig. 3 is a flowchart of another method for transmitting a synchronization access signal group according to an embodiment of the present invention, where the synchronization access signal group includes PSS, SSS, and PBCH signals, and as shown in fig. 3, the method includes the following steps:

step 301, at a first time resource, transmitting the PSS using a first antenna port.

The first time resource may be a slot or a 1 st time resource in a subframe, for example: the first OFDM symbol, which is not limited in the embodiments of the present invention.

Step 302, at a second time resource, transmitting the SSS using a first antenna port.

The second time resource may be a time resource continuous with the first time resource, but the embodiment of the present invention is not limited thereto.

Step 303, in a third time resource, sending the PBCH signal by using the first antenna port and the second antenna port.

The third time resource may be a time resource continuous with the second time resource, but the embodiment of the present invention is not limited thereto.

Optionally, the sending the PBCH signal by using the first antenna port and the second antenna port in the third time resource includes:

and in a third time resource, the PBCH signal is sent by using the first antenna port and the second antenna port in a space-frequency diversity or space-time diversity mode.

In the above, the sending of the PBCH signal in the third time resource by using the first antenna port and the second antenna port and using the space-frequency diversity or space-time diversity mode may be that at least two PBCH signal symbols sent on at least two adjacent subcarriers or at least two OFDM symbols in the third time resource are precoded, and the coded symbols are sent on the first antenna port and the second antenna port respectively.

For example: the transmitting the PBCH signal in the third time resource by using the first antenna port and the second antenna port and using a space-frequency diversity or space-time diversity method includes:

and precoding the first PBCH information symbol and the second PBCH information symbol, and sending a precoding result by using the first antenna port and the second antenna port in a third time resource.

For example: the ith information symbol x (i) ═ x of two antenna ports in the PBCH signal⁽⁰⁾(i) x⁽¹⁾(i)]^TInformation symbols y (i) transmitted by space-frequency diversity or space-time diversity [ y ═ y-⁽⁰⁾(i) y⁽¹⁾(i)]^TAnd the precoding operation of the PBCH signal symbols is as follows:

wherein Re represents the real part of the complex number, Im represents the imaginary step of the complex number, and j is the unit of imaginary number.

It should be noted that the precoding method is only an example, and in the embodiment of the present invention, the precoding method of the PBCH signal is not limited.

In the embodiment of the present invention, the PBCH signal is transmitted on the third time resource by using the space-frequency diversity or space-time diversity, so that the detection performance of the PBCH can be improved, that is, the user terminal can more easily detect the PBCH signal.

Step 304, at the fourth time resource, re-transmitting the PSS using the first antenna port.

Step 305, in a fifth time resource, using a second antenna port to transmit the SSS again.

The fifth time resource may be a time resource continuous with the fourth time resource, but the embodiment of the present invention is not limited thereto.

Through the steps, when the SSS is transmitted by using the first antenna port in the second time resource, the SSS is transmitted again by using the second antenna port in the fifth time resource;

in this embodiment, when the SSS is transmitted twice, different antenna ports may be used, thereby improving the performance of channel estimation.

Optionally, the SSS includes a first random sequence and a second random sequence;

the transmitting the SSS using a first antenna port, comprising:

using a first antenna port, occupying a first preset frequency band to send the first random sequence, and occupying a second preset frequency band to send the second random sequence;

the retransmitting the SSS using a second antenna port, comprising:

and using a second antenna port to occupy a first preset frequency band to send the first random sequence, and occupying a second preset frequency band to send the second random sequence.

The first random sequence and the second random sequence may be randomly generated by the network side device, and the generation mode may be generated according to a preset rule.

In this embodiment, it may be implemented that the first random sequence of the SSS is transmitted in a second time resource using the same antenna port and the second random sequence of the SSS is transmitted in a fifth time resource using another antenna port and in a different frequency resource, and the PBCH signal is transmitted in a third time using two antenna ports. Therefore, the SSS signals in the synchronous access signal group (SS block) can be repeatedly transmitted by using the double-antenna port, and the time and frequency synchronization precision is improved. And then the user terminal carries out channel estimation through the detected SSS to detect the PBCH signal, thereby saving the overhead of pilot signals. The frequency spectrum utilization efficiency of the system is improved.

For example: as shown in fig. 4, for example, one synchronous access signal group (SS block) occupies one slot (slot) for transmission, and signals in the synchronous access signal group (SS block) are transmitted using two antenna ports, where the PSS and the SSs are transmitted twice. The PSS transmits for the first time using the 1 st OFDM symbol in slot at antenna port 0, and the PSS still transmits for the second time using the 6 th OFDM symbol in slot at antenna port 0. I.e. the PSS is transmitted using only one antenna port. The SSS transmits for the first time using the 2 nd OFDM symbol in slot at antenna port 0, and the SSS transmits for the second time using the 7 th OFDM symbol in slot at antenna port 1. That is, the antenna port used by the SSS in the two transmissions is switched. The PBCH always uses two antenna ports simultaneously to transmit in 3 rd, 4 th and 5 th OFDM symbols by using space-frequency diversity and space-time diversity. The two antenna ports are the same as those used by the PSS, SSS. The signal structure of the whole SS block is shown in fig. 4. Thus, the PBCH can carry out channel estimation through the SSS, thereby saving the expense of CRS and improving the frequency spectrum efficiency.

Here, the SSS is composed of two random sequences, random sequence 0 and random sequence 1. SSS occupies one OFDM symbol per transmission, where sequence 0 is transmitted with lower frequency Physical Resource Block (PRB) or Resource Block (RB), and sequence 1 is transmitted with higher frequency PRB. In the scheme, the two sequences are transmitted by using the same port every time SSS is transmitted.

Optionally, in this embodiment, the first preset frequency band is lower than a preset threshold, and the second preset frequency band is higher than the preset threshold.

The preset threshold may be pre-configured by the network side device, or pre-negotiated between the network side device and the user equipment.

Optionally, the time resources corresponding to the synchronization access signal group include the first time resource, the second time resource, the third time resource, the fourth time resource, and the fifth time resource.

In this embodiment, the signals in the same synchronization access signal group can be transmitted by using the time resources corresponding to the synchronization access signal group, that is, the signals in different synchronization access signal groups can be transmitted by using different time resources, so that the detection performance of the synchronization access signal group can be improved.

Preferentially, the time resource corresponding to the synchronization access signal group is a slot (slot), the first time resource is the 1 st OFDM symbol in the slot, the second time resource is the 2 nd OFDM symbol in the slot, the third time resource is the 3 rd, 4 th and 5 th OFDM symbols in the slot, the fourth time resource is the 6 th OFDM symbol in the slot, and the fifth time resource is the 7 th OFDM symbol in the slot.

For example: one synchronous access signal group occupies one slot for transmission, and the PSS and the SSS in the synchronous access signal group need to be transmitted twice. The PSS first transmits using antenna port 0 on the 1 st OFDM symbol in the slot and may transmit on all Resource Blocks (RBs) within that OFDM symbol, and the PSS second transmits using antenna port 1 on the 6 th OFDM symbol in the slot. The SSS is sent for the first time using the 2 nd OFDM symbol in slot with antenna port 0 and/or 1, and the SSS is sent for the second time using the 7 th OFDM symbol in slot with antenna port 1 and/or 0. And the PBCH signal is always transmitted in 3 rd, 4 th and 5 th OFDM symbols simultaneously using two antenna ports by using space-frequency diversity and space-time diversity. The two antenna ports are the same as those used by the PSS, SSS. Therefore, the PBCH signal can carry out channel estimation through the SSS, thereby saving the expense of CRS and improving the frequency spectrum efficiency.

In this example, with the above design, the user terminal may detect the PSS and SSS signals in the synchronous access signal group at the corresponding OFDM symbol through different antenna ports in the dual antenna ports, thereby achieving precise time and frequency synchronization. And then performs channel estimation through the SSS to detect the PBCH signal, thereby obtaining system information.

In this embodiment, at a first time resource, the PSS is transmitted using a first antenna port; transmitting, at a second time resource, the SSS using a first antenna port; transmitting the PBCH signal using the first antenna port and the second antenna port at a third time resource; at a fourth time resource, re-transmitting the PSS using the first antenna port; retransmitting the SSS using a second antenna port at a fifth time resource. The PSS and the SSS are transmitted for multiple times, so that the detection performance of the PSS and the SSS and the synchronization precision of time and frequency are improved, the overhead of pilot signals is saved, and the frequency spectrum utilization efficiency of a system is improved. And because the antenna ports used are different when the SSS is transmitted twice, the performance of channel estimation is improved.

Third embodiment

Referring to fig. 5, fig. 5 is a flowchart of another method for transmitting a synchronization access signal group according to an embodiment of the present invention, where the synchronization access signal group includes PSS, SSS, and PBCH signals, and as shown in fig. 5, the method includes the following steps:

step 501, at a first time resource, transmitting the PSS using a first antenna port.

Step 502, in a second time resource, transmitting the SSS using a second antenna port.

Step 503, in the third time resource, the PBCH signal is transmitted by using the first antenna port and the second antenna port.

Step 504, at the fourth time resource, re-transmitting the PSS using the first antenna port.

And 505, at a fifth time resource, using the first antenna port to send the SSS again.

Through the steps, when the SSS is transmitted by using the second antenna port in the second time resource, the SSS is transmitted again by using the first antenna port in the fifth time resource.

Optionally, in this embodiment, the SSS includes a first random sequence and a second random sequence;

the transmitting the SSS using a second antenna port, comprising:

using a second antenna port, occupying a first preset frequency band to send the first random sequence, and occupying a second preset frequency band to send the second random sequence;

the resending the SSS using a first antenna port, comprising:

and using a first antenna port to occupy a first preset frequency band to send the first random sequence, and occupying a second preset frequency band to send the second random sequence.

For example: as shown in fig. 6, for example, one synchronous access signal group (SS block) occupies one slot (slot) for transmission, and signals in the synchronous access signal group (SS block) are transmitted using two antenna ports, where the PSS and the SSs are transmitted twice. The PSS transmits for the first time using the 1 st OFDM symbol in slot at antenna port 0, and the PSS still transmits for the second time using the 6 th OFDM symbol in slot at antenna port 0. I.e. the PSS is transmitted using only one antenna port. The SSS transmits for the first time using the 2 nd OFDM symbol in slot at antenna port 1, and the SSS transmits for the second time using the 7 th OFDM symbol in slot at antenna port 0. That is, the antenna port used by the SSS in the two transmissions is switched. The PBCH always uses two antenna ports simultaneously to transmit in 3 rd, 4 th and 5 th OFDM symbols by using space-frequency diversity and space-time diversity. The two antenna ports are the same as those used by the PSS, SSS. The signal structure of the whole SS block is shown in fig. 6. Thus, the PBCH can carry out channel estimation through the SSS, thereby saving the expense of CRS and improving the frequency spectrum efficiency.

Here, the SSS is composed of two random sequences, random sequence 0 and random sequence 1. SSS occupies one OFDM symbol per transmission, with sequence 0 being transmitted with lower frequency PRBs or RB and sequence 1 being transmitted with higher frequency PRBs. In the scheme, the two sequences are transmitted by using the same port every time SSS is transmitted.

In this embodiment, at a first time resource, the PSS is transmitted using a first antenna port; transmitting the SSS using a second antenna port at a second time resource; transmitting the PBCH signal using the first antenna port and the second antenna port at a third time resource; at a fourth time resource, re-transmitting the PSS using the first antenna port; at a fifth time resource, the SSS is again transmitted using the first antenna port. The PSS and the SSS are transmitted for multiple times, so that the detection performance of the PSS and the SSS and the synchronization precision of time and frequency are improved, the overhead of pilot signals is saved, and the frequency spectrum utilization efficiency of a system is improved. And because the antenna ports used are different when the SSS is transmitted twice, the performance of channel estimation is improved.

Fourth embodiment

Referring to fig. 7, fig. 7 is a flowchart of another method for transmitting a synchronization access signal group according to an embodiment of the present invention, where the synchronization access signal group includes PSS, SSS, and PBCH signals, and as shown in fig. 7, the method includes the following steps:

step 701, at a first time resource, transmitting the PSS using a first antenna port.

Step 702, in a second time resource, transmitting the SSS using a first antenna port and a second antenna port.

And 703, sending the PBCH signal by using the first antenna port and the second antenna port in the third time resource.

Step 704, at the fourth time resource, re-transmitting the PSS using the first antenna port.

Step 705, in the fifth time resource, the SSS is sent again using the second antenna port and the first antenna port.

the transmitting, at the second time resource, the SSS using the first antenna port and/or the second antenna port, including:

using a first antenna port to occupy a first preset frequency band to send the first random sequence and using a second antenna port to occupy a second preset frequency band to send the second random sequence in a second time resource;

the retransmitting, at the fifth time resource, the SSS using the second antenna port and/or the first antenna port, including:

and in a fifth time resource, using a second antenna port to occupy a first preset frequency band to send the first random sequence, and using the first antenna port to occupy a second preset frequency band to send the second random sequence.

In this embodiment, it may be implemented that the first random sequence of the SSS is transmitted in different frequency resources using different antenna ports at the second time resource, and the second random sequence of the SSS is transmitted in different frequency resources using different antenna ports at the fifth time resource, and the PBCH signal is transmitted using two antenna ports at the third time. Therefore, the SSS can be repeatedly transmitted twice at each antenna port, and the second time resource and the fifth time resource can be respectively arranged at two ends of one slot, so that the performance of channel estimation is greatly improved. In addition, the performance of channel estimation is further improved by switching two sequence transmitting antenna ports of SSS of different frequency resources (such as a low frequency band and a high frequency band) in the first transmission and the second transmission.

For example: as shown in fig. 8, for example, one synchronization access signal group (SS block) occupies one slot for transmission, and signals in the synchronization access signal group (SS block) are transmitted using two antenna ports. The PSS and SSS therein are transmitted twice. The PSS transmits for the first time using the 1 st OFDM symbol in slot at antenna port 0, and the PSS still transmits for the second time using the 6 th OFDM symbol in slot at antenna port 0. I.e. the PSS is transmitted using only one antenna port. The SSS transmits the 2 nd OFDM symbol in slot for the first time, where sequence 0 is transmitted in a lower frequency Physical Resource Block (PRB) with antenna port 0 and sequence 1 is transmitted in a higher frequency PRB with antenna port 1. The SSS is transmitted for the second time in the slot at the 7 th OFDM symbol, and the same SSS sequence is repeated twice within this OFDM symbol, unlike the first time, where sequence 0 is transmitted on the lower frequency PRB using antenna port 1 and sequence 1 is transmitted on the higher frequency PRB using antenna port 0. That is, the second transmission is performed with the switching of the transmission antenna port used for each sequence of the SSS compared to the first transmission. The PBCH always uses two antenna ports simultaneously to transmit in 3 rd, 4 th and 5 th OFDM symbols by using space-frequency diversity and space-time diversity. The two antenna ports are the same as those used by the PSS, SSS. The signal structure of the whole SS block is shown in fig. 8, so that the PBCH can perform channel estimation through the SSs, thereby saving the overhead of the CRS and improving the spectrum efficiency.

In this embodiment, at a first time resource, the PSS is transmitted using a first antenna port; transmitting, at a second time resource, the SSS using a first antenna port and a second antenna port; transmitting the PBCH signal using the first antenna port and the second antenna port at a third time resource; at a fourth time resource, re-transmitting the PSS using the first antenna port; at a fifth time resource, the SSS is again transmitted using the second antenna port and the first antenna port. The PSS and the SSS are transmitted for multiple times, so that the detection performance of the PSS and the SSS and the synchronization precision of time and frequency are improved, the overhead of pilot signals is saved, and the frequency spectrum utilization efficiency of a system is improved. And because the SSS is transmitted by using the same dual-antenna port as the PBCH signal, the method is beneficial for the user terminal to detect the PBCH signal by using the channel estimation of the detected SSS so as to improve the detection performance. In addition, the first random sequence of the SSS may be transmitted in a second time resource using a different antenna port, and the second random sequence of the SSS may be transmitted in a fifth time resource using a different antenna port in a different frequency resource, and the PBCH signal may be transmitted using two antenna ports at a third time. Therefore, the SSS can be repeatedly transmitted twice at each antenna port, and the second time resource and the fifth time resource can be respectively arranged at two ends of one slot, so that the performance of channel estimation is greatly improved. In addition, the performance of channel estimation is further improved by switching two sequence transmitting antenna ports of SSS with different frequency resources in the first transmission and the second transmission.

Fifth embodiment

Referring to fig. 9, fig. 9 is a flowchart of a method for receiving a synchronization access signal group according to an embodiment of the present invention, where the synchronization access signal group includes PSS, SSS, and PBCH signals, as shown in fig. 9, the method includes the following steps:

step 901, detecting the PSS using a third antenna port at the first time resource.

In step 901, the ue may detect the PSS on corresponding time resources using an antenna port corresponding to an antenna port used by the network side device to transmit the PSS. For example: the first transmission PSS is transmitted using the first antenna port at the first time resource, and the user terminal may detect the PSS using a third antenna port corresponding to the first antenna port at the first time resource.

And 902, detecting the SSS by using the third antenna port and/or the fourth antenna port at the second time resource.

In step 902, the ue may detect the SSS on a frequency resource in a corresponding time resource using an antenna port corresponding to an antenna port used by the network side device to transmit the SSS. For example: the first time the SSS is transmitted using the first antenna port at the second time resource, the user terminal may detect the SSS using a third antenna port corresponding to the first antenna port at the second time resource.

And step 903, detecting the PSS again by using a third antenna port at a fourth time resource.

Step 904, detecting the SSS again at a fifth time resource using a fourth antenna port and/or a third antenna port.

Step 905, performing time and frequency synchronization by using the detected PSS and SSS, performing channel estimation by using the detected SSS, and obtaining a channel estimation result.

When the user terminal detects the PSS and the SSS, the PSS and the SSS may be utilized to perform time and frequency synchronization with the network side device, and when the PSS and the SSS are detected, the user terminal may perform channel estimation to obtain a channel estimation result.

Step 906, in a third time resource, detecting the PBCH signal using a third antenna port and a fourth antenna port by using the channel estimation result.

Since the PSS, SSS, and PBCH described above belong to the same synchronization access signal group, PBCH can be detected using channel estimation results of the PSS and SSS.

After the PSS and the SSS are detected by the user equipment, the detected PSS and SSS may be used to synchronize time and frequency, and the detected SSS may be used to perform channel estimation, obtain a channel estimation result, and then use the third antenna port and the fourth antenna port to detect the PBCH signal by using the channel estimation result. If the PBCH signal includes system information, the ue may also demodulate the detected PBCH signal to obtain the system information. The SSS is directly used for channel estimation, so CRS does not need to be transmitted, the expense of the CRS can be saved, and the frequency spectrum efficiency is improved.

In the embodiment of the invention, the PSS is detected by using a third antenna port at a first time resource; detecting, at a second time resource, the SSS using a third antenna port and/or a fourth antenna port; re-detecting the PSS using a third antenna port at a fourth time resource; detecting the SSS again at a fifth time resource using a fourth antenna port and/or a third antenna port; performing time and frequency synchronization by using the detected PSS and the detected SSS, performing channel estimation by using the detected SSS, and acquiring a channel estimation result; and detecting the PBCH signal by using a third antenna port and a fourth antenna port by using the channel estimation result in a third time resource. The PSS and the SSS are detected for multiple times, so that the detection performance of the PSS and the SSS and the synchronization precision of time and frequency are improved, the overhead of pilot signals is saved, and the frequency spectrum utilization efficiency of a system is improved.

Sixth embodiment

Referring to fig. 10, fig. 10 is a flowchart of a method for receiving a synchronization access signal group according to an embodiment of the present invention, where the synchronization access signal group includes PSS, SSS, and PBCH signals, as shown in fig. 10, the method includes the following steps:

step 1001, detecting the PSS using a third antenna port at the first time resource.

In step 1001, the ue may detect the PSS on corresponding time resources using an antenna port corresponding to an antenna port used by the network side device to transmit the PSS. For example: the first transmission PSS is transmitted using the first antenna port at the first time resource, and the user terminal may detect the PSS using a third antenna port corresponding to the first antenna port at the first time resource.

Step 1002, detecting the SSS at a second time resource using a third antenna port.

In step 1002, the ue may detect the SSS on a frequency resource in a corresponding time resource by using an antenna port corresponding to an antenna port used by the network side device to transmit the SSS. For example: the first time the SSS is transmitted using the first antenna port at the second time resource, the user terminal may detect the SSS using a third antenna port corresponding to the first antenna port at the second time resource.

And step 1003, detecting the PSS again by using a third antenna port at a fourth time resource.

Step 1004, detecting the SSS again using a fourth antenna port at a fifth time resource.

Step 1005, performing time and frequency synchronization by using the detected PSS and SSS, performing channel estimation by using the detected SSS, and acquiring a channel estimation result.

Step 1006, in a third time resource, detecting the PBCH signal by using the third antenna port and the fourth antenna port according to the channel estimation result.

In addition, for the time resources, reference may be made to the corresponding descriptions in the first to fourth embodiments, which are not repeated herein and may achieve the same beneficial effects.

the detecting the SSS using a third antenna port, comprising:

detecting the first random sequence through a first preset frequency band and the second random sequence through a second preset frequency band by using a third antenna port;

the detecting the SSS again using a fourth antenna port, comprising:

and detecting the first random sequence through a first preset frequency band and detecting the second random sequence through a second preset frequency band by using a fourth antenna port.

In this embodiment, it may be implemented that a first random sequence of SSS is detected at a second time resource using the same antenna port and a second random sequence of SSS is detected at a fifth time resource using another antenna port and a PBCH signal is detected at a third time using two antenna ports. Therefore, the SSS signals in the synchronous access signal group (SS block) can be repeatedly detected by using the double antenna ports, and the time and frequency synchronization precision is improved. The user terminal then performs channel estimation through the detected SSS to detect the PBCH signal, thereby eliminating the overhead of pilot signals. The frequency spectrum utilization efficiency of the system is improved.

Optionally, the first preset frequency band is lower than a preset threshold, and the second preset frequency band is higher than the preset threshold.

Optionally, the detecting the PBCH signal using the third antenna port and the fourth antenna port by using the channel estimation result in the third time resource includes:

and detecting the PBCH signal by using a third antenna port and a fourth antenna port in a third time resource in a space-frequency diversity or space-time diversity mode by using the channel estimation result.

In the embodiment of the present invention, the PBCH signal is detected on the third time resource by using the space-frequency diversity or space-time diversity, so that the detection performance of the PBCH can be improved, that is, the user terminal can more easily detect the PBCH signal.

Optionally, a time resource corresponding to the synchronization access signal group is a slot, the first time resource is a 1 st OFDM symbol in the slot, the second time resource is a 2 nd OFDM symbol in the slot, the third time resource is 3 rd, 4 th and 5 th OFDM symbols in the slot, the fourth time resource is a 6 th OFDM symbol in the slot, and the fifth time resource is a 7 th OFDM symbol in the slot.

For the above time resources, reference may be made to corresponding descriptions of the second embodiment to the fourth embodiment, which are not described herein again and the same beneficial effects may be achieved.

In the embodiment of the invention, the PSS is detected by using a third antenna port at a first time resource; detecting, at a second time resource, the SSS using a third antenna port; re-detecting the PSS using a third antenna port at a fourth time resource; detecting the SSS again using a fourth antenna port at a fifth time resource; performing time and frequency synchronization by using the detected PSS and the detected SSS, performing channel estimation by using the detected SSS, and acquiring a channel estimation result; and detecting the PBCH signal by using a third antenna port and a fourth antenna port by using the channel estimation result in a third time resource. The PSS and the SSS are detected for multiple times, so that the detection performance of the PSS and the SSS and the synchronization precision of time and frequency are improved, the overhead of pilot signals is saved, and the frequency spectrum utilization efficiency of a system is improved. And because the antenna ports used are different when the SSS is detected twice, the performance of channel estimation is improved.

Seventh embodiment

Referring to fig. 11, fig. 11 is a flowchart of a method for receiving a synchronization access signal group according to an embodiment of the present invention, where the synchronization access signal group includes PSS, SSS, and PBCH signals, as shown in fig. 11, the method includes the following steps:

step 1101, at the first time resource, detecting the PSS using a third antenna port.

In step 1101, the user terminal may detect the PSS on corresponding time resources using an antenna port corresponding to an antenna port used by the network side device to transmit the PSS. For example: the first transmission PSS is transmitted using the first antenna port at the first time resource, and the user terminal may detect the PSS using a third antenna port corresponding to the first antenna port at the first time resource.

Step 1102, detect the SSS at a second time resource using a fourth antenna port.

In step 1102, the ue may detect the SSS on a frequency resource in a corresponding time resource using an antenna port corresponding to an antenna port used by the network side device to transmit the SSS. For example: the first SSS transmission is sent using the second antenna port at the second time resource, and the ue may detect the SSS using a fourth antenna port corresponding to the second antenna port at the second time resource.

Step 1103, detecting the PSS again using the third antenna port at the fourth time resource.

And 1104, detecting the SSS again by using a third antenna port at a fifth time resource.

And 1105, performing time and frequency synchronization by using the detected PSS and SSS, performing channel estimation by using the detected SSS, and obtaining a channel estimation result.

Step 1106, detecting the PBCH signal by using the third antenna port and the fourth antenna port according to the channel estimation result in the third time resource.

the detecting the SSS using a fourth antenna port, comprising:

detecting the first random sequence through a first preset frequency band and the second random sequence through a second preset frequency band by using a fourth antenna port;

the detecting the SSS again using a third antenna port, comprising:

and detecting the first random sequence through a first preset frequency band and the second random sequence through a second preset frequency band by using a third antenna port.

In the embodiment of the invention, the PSS is detected by using a third antenna port at a first time resource; detecting, at a second time resource, the SSS using a fourth antenna port; re-detecting the PSS using a third antenna port at a fourth time resource; detecting the SSS again at a fifth time resource using a third antenna port; performing time and frequency synchronization by using the detected PSS and the detected SSS, performing channel estimation by using the detected SSS, and acquiring a channel estimation result; and detecting the PBCH signal by using a third antenna port and a fourth antenna port by using the channel estimation result in a third time resource. The PSS and the SSS are detected for multiple times, so that the detection performance of the PSS and the SSS and the synchronization precision of time and frequency are improved, the overhead of pilot signals is saved, and the frequency spectrum utilization efficiency of a system is improved. And because the antenna ports used are different when the SSS is detected twice, the performance of channel estimation is improved.

Eighth embodiment

Referring to fig. 12, fig. 12 is a flowchart of a method for receiving a synchronization access signal group according to an embodiment of the present invention, where the synchronization access signal group includes PSS, SSS, and PBCH signals, as shown in fig. 12, the method includes the following steps:

step 1201, detecting the PSS using a third antenna port at the first time resource.

In step 1201, the ue may detect the PSS on corresponding time resources using an antenna port corresponding to an antenna port used by the network side device to transmit the PSS. For example: the first transmission PSS is transmitted using the first antenna port at the first time resource, and the user terminal may detect the PSS using a third antenna port corresponding to the first antenna port at the first time resource.

Step 1202, detecting the SSS at a second time resource using a third antenna port and a fourth antenna port.

In step 1202, the ue may detect the SSS on a frequency resource in a corresponding time resource using an antenna port corresponding to an antenna port used by the network side device to transmit the SSS. For example: the first SSS transmission is sent using the first antenna port and the second antenna port at the second time resource, and then the user terminal may detect the SSS using the third antenna port and the fourth antenna port corresponding to the first antenna port at the second time resource.

Step 1203, detecting the PSS again using a third antenna port at a fourth time resource.

And 1204, detecting the SSS again by using the fourth antenna port and the third antenna port at the fifth time resource.

And step 1205, performing time and frequency synchronization by using the detected PSS and SSS, performing channel estimation by using the detected SSS, and acquiring a channel estimation result.

Step 1206, detecting the PBCH signal using a third antenna port and a fourth antenna port at a third time resource using the channel estimation result.

the detecting, at the second time resource, the SSS using a third antenna port and/or a fourth antenna port, comprising:

detecting the first random sequence through a first preset frequency band by using a third antenna port and detecting the second random sequence through a second preset frequency band by using a fourth antenna port at a second time resource;

the detecting the SSS again at a fifth time resource using a fourth antenna port and/or a third antenna port, comprising:

and at a fifth time resource, using a fourth antenna port, detecting the first random sequence through a first preset frequency band, using a third antenna port, and detecting the second random sequence through a second preset frequency band.

In this embodiment, it may be implemented that the first random sequence of the SSS is detected at different frequency resources using different antenna ports at the second time resource, and the second random sequence of the SSS is detected at different frequency resources using different antenna ports at the fifth time resource, and the PBCH signal is transmitted using two antenna ports at the third time. Therefore, the SSS can be repeatedly detected twice at each antenna port, and the second time resource and the fifth time resource can be respectively arranged at two ends of one slot, so that the performance of channel estimation is greatly improved. In addition, the switching of the antenna ports is detected through two sequences of SSS of different frequency resources (such as a low frequency band and a high frequency band) in the first transmission and the second detection, so that the performance of channel estimation is further improved.

In the embodiment of the invention, the PSS is detected by using a third antenna port at a first time resource; detecting the SSS using a third antenna port and a fourth antenna port at a second time resource; re-detecting the PSS using a third antenna port at a fourth time resource; detecting the SSS again at a fifth time resource using a fourth antenna port and a third antenna port; performing time and frequency synchronization by using the detected PSS and the detected SSS, performing channel estimation by using the detected SSS, and acquiring a channel estimation result; and detecting the PBCH signal by using a third antenna port and a fourth antenna port by using the channel estimation result in a third time resource. The PSS and the SSS are detected for multiple times, so that the detection performance of the PSS and the SSS and the synchronization precision of time and frequency are improved, the overhead of pilot signals is saved, and the frequency spectrum utilization efficiency of a system is improved. And because the SSS is detected and the PBCH signal is transmitted by using the same dual-antenna port, the channel estimation of the detected SSS is used for detecting the PBCH signal by the user terminal, so that the detection performance is improved. In addition, the first random sequence of the SSS may be detected at a second time resource using a different antenna port at a different frequency resource, and the second random sequence of the SSS may be detected at a fifth time resource using a different antenna port at a different frequency resource, while the PBCH signal may be detected at a third time using two antenna ports. Therefore, the SSS can be repeatedly detected twice at each antenna port, and the second time resource and the fifth time resource can be respectively arranged at two ends of one slot, so that the performance of channel estimation is greatly improved. In addition, the switching of the antenna ports is detected through two sequences of SSS of different frequency resources in the first detection and the second detection, so that the performance of channel estimation is further improved.

Ninth embodiment

Referring to fig. 13, fig. 13 is a structural diagram of a network device according to an embodiment of the present invention, which can implement details of the sending methods of the synchronous access signal groups in the first to fourth embodiments, and achieve the same effects. The network side device is configured to synchronize transmissions at an access signal level, where the synchronization access signal group includes PSS, SSS, and PBCH signals, as shown in fig. 13, the network side device 1300 includes: a first sending module 1301, a second sending module 1302, a third sending module 1303, a fourth sending module 1304, and a fifth sending module 1305, wherein:

a first sending module 1301, configured to send the PSS using a first antenna port at a first time resource;

a second sending module 1302, configured to send the SSS using the first antenna port and/or the second antenna port at a second time resource;

a third sending module 1303, configured to send the PBCH signal using the first antenna port and the second antenna port at a third time resource;

a fourth sending module 1304, configured to send the PSS again using the first antenna port at a fourth time resource;

a fifth sending module 1305, configured to send the SSS again using the second antenna port and/or the first antenna port at a fifth time resource.

Optionally, when the SSS is transmitted using the first antenna port at the second time resource, the SSS is transmitted again using the second antenna port at the fifth time resource;

when the SSS is transmitted using a second antenna port at the second time resource, the SSS is transmitted again using a first antenna port at the fifth time resource.

the second sending module 1302 is specifically configured to use the first antenna port to occupy a first preset frequency band to send the first random sequence and occupy a second preset frequency band to send the second random sequence at a second time resource; or specifically, the first random sequence is sent by using a second antenna port in a second time resource, and the first random sequence is sent by occupying a first preset frequency band and the second random sequence is sent by occupying a second preset frequency band;

the fourth sending module 1304 is specifically configured to use the first antenna port to occupy a first preset frequency band to send the first random sequence and occupy a second preset frequency band to send the second random sequence in a fourth time resource; or specifically, the second antenna port is used for occupying a first preset frequency band to transmit the first random sequence and occupying a second preset frequency band to transmit the second random sequence in a fourth time resource.

the second sending module 1302 is specifically configured to use a first antenna port to occupy a first preset frequency band to send the first random sequence at a second time resource, and use a second antenna port to occupy a second preset frequency band to send the second random sequence;

the fifth sending module 1305 is specifically configured to use the second antenna port to occupy the first preset frequency band to send the first random sequence at the fifth time resource, and use the first antenna port to occupy the second preset frequency band to send the second random sequence.

Optionally, the third sending module 1303 is specifically configured to send, in a third time resource, the PBCH signal by using the first antenna port and the second antenna port and using a space-frequency diversity or a space-time diversity manner.

Optionally, the third sending module 1303 is specifically configured to precode the first PBCH information symbol and the second PBCH information symbol, and send a precoding result by using the first antenna port and the second antenna port in a third time resource.

It should be noted that, in this embodiment, the network-side device 1300 may be a network-side device according to any implementation manner in the method embodiment of the present invention, and any implementation manner of the network-side device in the method embodiment of the present invention may be implemented by the network-side device 1300 in this embodiment, so as to achieve the same beneficial effects, and details are not described here again.

Tenth embodiment

Referring to fig. 14, fig. 14 is a structural diagram of a user equipment according to an embodiment of the present invention, which is capable of implementing details of the methods for receiving a synchronization access signal group in the fifth embodiment to the eighth embodiment, and achieving the same effect. The ue is configured to receive a synchronization access signal group, where the synchronization access signal group includes PSS, SSS, and PBCH signals, as shown in fig. 14, and the ue 1400 includes: a first detection module 1401, a second detection module 1402, a third detection module 1403, a fourth detection module 1404, a synchronization module 1405, and a fifth detection module 1406, wherein:

a first detection module 1401 for detecting the PSS using a third antenna port at a first time resource;

a second detecting module 1402, configured to detect the SSS at a second time resource using a third antenna port and/or a fourth antenna port;

a third detecting module 1403, configured to detect the PSS again using a third antenna port at a fourth time resource;

a fourth detecting module 1404, configured to detect the SSS again using a fourth antenna port and/or a third antenna port at a fifth time resource;

a synchronization module 1405, configured to perform time and frequency synchronization by using the detected PSS and the SSS, perform channel estimation by using the detected SSS, and obtain a channel estimation result;

a fifth detecting module 1406, configured to detect the PBCH signal at a third time resource by using the channel estimation result and using a third antenna port and a fourth antenna port.

Optionally, when the SSS is detected using a third antenna port at the second time resource, the SSS is detected again using a fourth antenna port at the fifth time resource;

when the SSS is detected using a fourth antenna port at the second time resource, the SSS is detected again using a third antenna port at the fifth time resource.

the second detecting module 1402 is specifically configured to detect, at a second time resource, the first random sequence through a first preset frequency band and the second random sequence through a second preset frequency band by using a third antenna port; or specifically configured to detect, at a second time resource, the first random sequence through a first preset frequency band and the second random sequence through a second preset frequency band using a fourth antenna port;

the fourth detecting module 1404 is specifically configured to detect the first random sequence through a first preset frequency band and detect the second random sequence through a second preset frequency band by using a third antenna port; or specifically configured to detect the first random sequence through a first preset frequency band and detect the second random sequence through a second preset frequency band using a fourth antenna port.

the second detecting module 1402 is specifically configured to detect, at a second time resource, the first random sequence through a first preset frequency band using a third antenna port, and detect the second random sequence through a second preset frequency band using a fourth antenna port;

the fourth detecting module 1404 is specifically configured to detect the first random sequence at a fifth time resource through a first preset frequency band by using a fourth antenna port, and detect the second random sequence at a second preset frequency band by using a third antenna port.

Optionally, the fifth detecting module 1406 is specifically configured to, in a third time resource, utilize the channel estimation result, and use a third antenna port and a fourth antenna port to detect the PBCH signal in a space-frequency diversity or space-time diversity manner.

It should be noted that, in this embodiment, the user terminal 1400 may be a user terminal in any implementation manner in the method embodiment of the present invention, and any implementation manner of the user terminal in the method embodiment of the present invention may be implemented by the user terminal 1400 in this embodiment, and the same beneficial effects are achieved, and details are not described here.

Eleventh embodiment

Referring to fig. 15, fig. 15 is a structural diagram of a network side device applied in the embodiment of the present invention, which can implement details of the transmission methods of the synchronous access signal groups in the first embodiment to the second embodiment, and achieve the same effect, where the synchronous access signal group includes PSS, SSS, and PBCH signals. As shown in fig. 15, the network-side device 1500 includes: a processor 1501, a transceiver 1502, a memory 1503, a user interface 1504, and a bus interface, wherein:

the processor 1501, which is configured to read the program in the memory 1503, executes the following processes:

transmitting, at a first time resource, the PSS using a first antenna port;

Wherein the transceiver 1502 is configured to receive and transmit data under the control of the processor 1501, the transceiver 1502 includes at least two antenna ports.

In fig. 15, the bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by processor 1501, and various circuits, represented by memory 1503, linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 1502 may be a plurality of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium. The user interface 1504 may also be an interface capable of interfacing with a desired device for different user devices, including but not limited to a keypad, display, speaker, microphone, joystick, etc.

The processor 1501 is responsible for managing a bus architecture and general processing, and the memory 1503 may store data used by the processor 1501 in performing operations.

the sending of the SSS using the first antenna port performed by the processor 1501 includes:

the sending of the SSS using the second antenna port performed by the processor 1501 includes:

the processor 1501 executing resending the SSS using the first antenna port includes:

the processor 1501 executing resending the SSS using a second antenna port includes:

the sending, by the processor 1501, the SSS using the first antenna port and/or the second antenna port at the second time resource includes:

the processor 1501, at the fifth time resource, of retransmitting the SSS using the second antenna port and/or the first antenna port, includes:

Optionally, the sending of the PBCH signal by the processor 1501 using the first antenna port and the second antenna port at the third time resource includes:

Optionally, the sending, by the processor 1501, the PBCH signal in the third time resource by using the first antenna port and the second antenna port and using a space-frequency diversity or a space-time diversity mode includes:

It should be noted that, in this embodiment, the network-side device 1500 may be a network-side device in any implementation manner in the method embodiment of the present invention, and any implementation manner of the network-side device in the method embodiment of the present invention may be implemented by the network-side device 1500 in this embodiment, so as to achieve the same beneficial effects, and details are not described here again.

Twelfth embodiment

Referring to fig. 16, fig. 16 is a structural diagram of a user terminal applied in the embodiment of the present invention, which can implement details of a receiving method of a synchronization signal in the third embodiment and achieve the same effect, where a synchronization access signal group includes a PSS signal, a SSS signal, and a PBCH signal. As shown in fig. 16, the user terminal 1600 includes: at least one processor 1601, memory 1602, at least one network interface 1604, and a user interface 1603. The various components in terminal 1600 are coupled together by a bus system 1605. It is understood that the bus system 1605 is used to enable connected communication between these components. The bus system 1605 includes a power bus, a control bus, and a status signal bus in addition to the data bus. But for clarity of illustration the various buses are labeled in figure 16 as bus system 1605.

The user interface 1603 may include, among other things, a display, a keyboard or a pointing device (e.g., a mouse, track ball, touch pad or touch screen, etc.).

It is to be understood that the memory 1602 in embodiments of the present invention may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The non-volatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash Memory. Volatile Memory can be Random Access Memory (RAM), which acts as external cache Memory. By way of illustration and not limitation, many forms of RAM are available, such as Static random access memory (Static RAM, SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic random access memory (Synchronous DRAM, SDRAM), Double Data Rate Synchronous Dynamic random access memory (ddr Data Rate SDRAM, ddr SDRAM), Enhanced Synchronous SDRAM (ESDRAM), Synchlink DRAM (SLDRAM), and Direct Rambus RAM (DRRAM). The memory 1602 of the systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

In some embodiments, memory 1602 stores the following elements, executable modules or data structures, or a subset thereof, or an expanded set thereof: an operating system 16021 and application programs 16022.

The operating system 16021 includes various system programs, such as a framework layer, a core library layer, a driver layer, etc., for implementing various basic services and processing hardware-based tasks. The application 16022 includes various applications, such as a Media Player (Media Player), a Browser (Browser), and the like, for implementing various application services. Programs that implement methods in accordance with embodiments of the present invention may be included within application 16022.

In the embodiment of the present invention, the processor 1601 is configured to, by calling a program or an instruction stored in the memory 1602, specifically, a program or an instruction stored in the application 16022:

detecting the PSS using a third antenna port at a first time resource;

re-detecting the PSS using a third antenna port at a fourth time resource;

detecting the SSS again at a fifth time resource using a fourth antenna port and/or a third antenna port;

performing time and frequency synchronization by using the detected PSS and the detected SSS, performing channel estimation by using the detected SSS, and acquiring a channel estimation result;

The method disclosed by the above-mentioned embodiments of the present invention may be applied to the processor 1601 or implemented by the processor 1601. The processor 1601 may be an integrated circuit chip with signal processing capabilities. In implementation, the steps of the method may be performed by hardware integrated logic circuits or instructions in software form in the processor 1601. The Processor 1601 may be a general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf programmable Gate Array (FPGA) or other programmable logic device, discrete Gate or transistor logic device, or discrete hardware components. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 1602, and the processor 1601 reads information in the memory 1602, and performs the steps of the method in combination with hardware thereof.

It is to be understood that the embodiments described herein may be implemented in hardware, software, firmware, middleware, microcode, or any combination thereof. For a hardware implementation, the Processing units may be implemented within one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), general purpose processors, controllers, micro-controllers, microprocessors, other electronic units configured to perform the functions described herein, or a combination thereof.

For a software implementation, the techniques described herein may be implemented with modules (e.g., procedures, functions, and so on) that perform the functions described herein. The software codes may be stored in a memory and executed by a processor. The memory may be implemented within the processor or external to the processor.

detecting the SSS using a third antenna port, performed by processor 1601, includes:

detecting the SSS using a fourth antenna port, performed by processor 1601, includes:

processor 1601 is further configured to detect the SSS using a third antenna port, including:

the processor 1601 is further configured to detect the SSS again using a fourth antenna port, including:

and detecting the first random sequence through a first preset frequency band and detecting the second random sequence through a second preset frequency band by using a fourth antenna port again.

detecting, by the processor 1601, at a second time resource, the SSS using a third antenna port and/or a fourth antenna port, includes:

the processor 1601 is further configured to detect the SSS again at a fifth time resource using the fourth antenna port and/or the third antenna port, including:

Optionally, the detecting the PBCH signal by using the third antenna port and the fourth antenna port at the third time resource by the processor 1601, where the detecting includes:

It should be noted that, in this embodiment, the user terminal 1600 may be a user terminal in any implementation manner in the method embodiment of the present invention, and any implementation manner of the user terminal in the method embodiment of the present invention may be implemented by the user terminal 1600 in this embodiment, and the same beneficial effects are achieved, and details are not described here.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment of the present invention.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A method for transmitting a set of synchronization access signals, wherein the set of synchronization access signals comprises Primary Synchronization Signals (PSS), Secondary Synchronization Signals (SSS) and Physical Broadcast Channel (PBCH) signals, the method comprising:

transmitting, at a first time resource, the PSS using a first antenna port;

at a fifth time resource, re-transmitting the SSS using a second antenna port and/or a first antenna port;

wherein, when the SSS is transmitted using a first antenna port at the second time resource, the SSS is transmitted again using a second antenna port at the fifth time resource;

2. The method of claim 1, wherein the SSS comprises a first random sequence and a second random sequence;

the transmitting the SSS using a first antenna port, comprising:

the transmitting the SSS using a second antenna port, comprising:

the resending the SSS using a first antenna port, comprising:

the retransmitting the SSS using a second antenna port, comprising:

3. The method of claim 1, wherein the SSS comprises a first random sequence and a second random sequence;

4. The method of claim 2 or 3, wherein the first predetermined frequency band is lower than a predetermined threshold value, and the second predetermined frequency band is higher than the predetermined threshold value.

5. The method of any of claims 1-3, wherein the transmitting the PBCH signal using the first antenna port and the second antenna port at the third time resource comprises:

6. The method of claim 5, wherein the transmitting the PBCH signal using the first antenna port and the second antenna port in the third time resource using space-frequency diversity or space-time diversity comprises:

7. The method of any of claims 1 to 3, wherein the time resources corresponding to the set of synchronization access signals include the first time resource, the second time resource, the third time resource, the fourth time resource, and the fifth time resource.

8. The method of claim 7, wherein the time resource corresponding to the synchronization access signal group is a slot, the first time resource is a 1 st Orthogonal Frequency Division Multiplexing (OFDM) symbol in the slot, the second time resource is a 2 nd OFDM symbol in the slot, the third time resource is 3 rd, 4 th and 5 th OFDM symbols in the slot, the fourth time resource is a 6 th OFDM symbol in the slot, and the fifth time resource is a 7 th OFDM symbol in the slot.

9. A method for receiving a set of synchronization access signals, wherein the set of synchronization access signals includes primary synchronization signals PSS, secondary synchronization signals SSS, and physical broadcast channel PBCH signals, the method comprising:

detecting the PSS using a third antenna port at a first time resource;

re-detecting the PSS using a third antenna port at a fourth time resource;

detecting the PBCH signal by using a third antenna port and a fourth antenna port by using the channel estimation result at a third time resource;

wherein when the SSS is detected using a third antenna port at the second time resource, the SSS is detected again using a fourth antenna port at the fifth time resource;

10. The method of claim 9, wherein the SSS comprises a first random sequence and a second random sequence;

the detecting the SSS using a third antenna port, comprising:

the detecting the SSS using a fourth antenna port, comprising:

the detecting the SSS again using a third antenna port, comprising:

the detecting the SSS again using a fourth antenna port, comprising:

11. The method of claim 9, wherein the SSS comprises a first random sequence and a second random sequence;

12. The method of claim 10 or 11, wherein the first predetermined frequency band is lower than a predetermined threshold value, and the second predetermined frequency band is higher than the predetermined threshold value.

13. The method of any of claims 9 to 11, wherein said detecting the PBCH signal using a third antenna port and a fourth antenna port using the channel estimation result at a third time resource comprises:

14. The method of any of claims 9 to 11, wherein the time resources corresponding to the set of synchronization access signals include the first time resource, the second time resource, the third time resource, the fourth time resource, and the fifth time resource.

15. The method of claim 14, wherein the time resource corresponding to the synchronous access signal group is a slot, the first time resource is a 1 st Orthogonal Frequency Division Multiplexing (OFDM) symbol in the slot, the second time resource is a 2 nd OFDM symbol in the slot, the third time resource is 3 rd, 4 th and 5 th OFDM symbols in the slot, the fourth time resource is a 6 th OFDM symbol in the slot, and the fifth time resource is a 7 th OFDM symbol in the slot.

16. A network side device for synchronized access signal level transmission, wherein the synchronized access signal group includes primary synchronization signals PSS, secondary synchronization signals SSS, and physical broadcast channel PBCH signals, the network side device comprising:

a fifth sending module, configured to send the SSS again using the second antenna port and/or the first antenna port at a fifth time resource;

17. The network-side device of claim 16, wherein the SSS comprises a first random sequence and a second random sequence;

the second sending module is specifically configured to use the first antenna port to occupy a first preset frequency band to send the first random sequence and occupy a second preset frequency band to send the second random sequence at a second time resource; or specifically configured to use a second antenna port to occupy a first preset frequency band to transmit the first random sequence and occupy a second preset frequency band to transmit the second random sequence at a second time resource

The fourth sending module is specifically configured to use the first antenna port to occupy a first preset frequency band to send the first random sequence and occupy a second preset frequency band to send the second random sequence in a fourth time resource; or specifically, the second antenna port is used for occupying a first preset frequency band to transmit the first random sequence and occupying a second preset frequency band to transmit the second random sequence in a fourth time resource.

18. The network-side device of claim 17, wherein the SSS comprises a first random sequence and a second random sequence;

the second sending module is specifically configured to use the first antenna port to occupy a first preset frequency band to send the first random sequence at a second time resource, and use the second antenna port to occupy a second preset frequency band to send the second random sequence;

the fifth sending module is specifically configured to use the second antenna port to occupy the first preset frequency band to send the first random sequence at a fifth time resource, and use the first antenna port to occupy the second preset frequency band to send the second random sequence.

19. The network-side device of claim 17 or 18, wherein the first predetermined frequency band is lower than a predetermined threshold, and the second predetermined frequency band is higher than a predetermined threshold.

20. The network-side device of any one of claims 16 to 18, wherein the third sending module is specifically configured to send the PBCH signal in a space-frequency diversity or space-time diversity manner by using the first antenna port and the second antenna port in a third time resource.

21. The network-side device of claim 20, wherein the third sending module is specifically configured to precode the first PBCH information symbol and the second PBCH information symbol, and send the precoding result using the first antenna port and the second antenna port at a third time resource.

22. The network-side device of any one of claims 16 to 18, wherein the time resources corresponding to the synchronization access signal group include the first time resource, the second time resource, the third time resource, the fourth time resource, and the fifth time resource.

23. The network-side device of claim 22, wherein the time resource corresponding to the synchronization access signal group is a slot, the first time resource is a 1 st Orthogonal Frequency Division Multiplexing (OFDM) symbol in the slot, the second time resource is a 2 nd OFDM symbol in the slot, the third time resource is 3 rd, 4 th and 5 th OFDM symbols in the slot, the fourth time resource is a 6 th OFDM symbol in the slot, and the fifth time resource is a 7 th OFDM symbol in the slot.

24. A user terminal configured to synchronize reception of a set of synchronization access signals, wherein the set of synchronization access signals includes primary synchronization signals PSS, secondary synchronization signals SSS, and physical broadcast channel PBCH signals, the user terminal comprising:

a third detecting module, configured to detect the PSS again using a third antenna port at a fourth time resource;

a fourth detecting module, configured to detect the SSS again using a fourth antenna port and/or a third antenna port at a fifth time resource;

a synchronization module, configured to perform time and frequency synchronization by using the detected PSS and SSS, perform channel estimation by using the detected SSS, and obtain a channel estimation result;

a fifth detecting module, configured to detect the PBCH signal using a third antenna port and a fourth antenna port by using the channel estimation result at a third time resource;

25. The user terminal of claim 24, wherein the SSS comprises a first random sequence and a second random sequence;

the second detection module is specifically configured to detect, at a second time resource, the first random sequence through a first preset frequency band and the second random sequence through a second preset frequency band by using a third antenna port; or specifically configured to detect, at a second time resource, the first random sequence through a first preset frequency band and the second random sequence through a second preset frequency band using a fourth antenna port;

the fourth detection module is specifically configured to detect the first random sequence through a first preset frequency band and detect the second random sequence through a second preset frequency band by using a third antenna port; or specifically configured to detect the first random sequence through a first preset frequency band and detect the second random sequence through a second preset frequency band using a fourth antenna port.

26. The user terminal of claim 24, wherein the SSS comprises a first random sequence and a second random sequence;

the second detection module is specifically configured to detect, at a second time resource, the first random sequence through a first preset frequency band using a third antenna port, and detect the second random sequence through a second preset frequency band using a fourth antenna port;

the fourth detection module is specifically configured to use a fourth antenna port to detect the first random sequence through a first preset frequency band at a fifth time resource, and use a third antenna port to detect the second random sequence through a second preset frequency band.

27. The ue according to claim 25 or 26, wherein the first predetermined frequency band is lower than a predetermined threshold, and the second predetermined frequency band is higher than a predetermined threshold.

28. The ue of any one of claims 24 to 26, wherein the fifth detecting module is specifically configured to detect the PBCH signal in a space-frequency diversity or space-time diversity manner by using the third antenna port and the fourth antenna port according to the channel estimation result in the third time resource.

29. The user terminal of any of claims 24 to 26, wherein the time resources corresponding to the set of synchronized access signals comprise the first time resource, the second time resource, the third time resource, the fourth time resource, and the fifth time resource.

30. The ue of claim 29, wherein the time resource corresponding to the synchronization access signal group is a slot, the first time resource is a 1 st OFDM symbol in the slot, the second time resource is a 2 nd OFDM symbol in the slot, the third time resource is 3 rd, 4 th and 5 th OFDM symbols in the slot, the fourth time resource is a 6 th OFDM symbol in the slot, and the fifth time resource is a 7 th OFDM symbol in the slot.

31. A transmission system for a synchronous access signal group, comprising the network-side device according to any one of claims 16 to 23 and the user terminal according to any one of claims 24 to 30.