CN110099420A

CN110099420A - A kind of wireless communications method and its relevant device

Info

Publication number: CN110099420A
Application number: CN201810099888.7A
Authority: CN
Inventors: 姚顺铨; 常玉辉
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2018-01-31
Filing date: 2018-01-31
Publication date: 2019-08-06

Abstract

The embodiment of the present application discloses a kind of wireless communications method and its relevant device, determines the system frame number SFN of neighbor cell using SS Block received when carrying out neighbor cell signal mass measurement for terminal.The embodiment of the present application method includes: the synchronization signal block SS Block that terminal receives neighbor cell；The terminal determines the signal quality of the neighbor cell according to the SS Block；When the signal quality of the neighbor cell meets prerequisite, the terminal determines the system frame number SFN of the neighbor cell according to the SS Block.

Description

Wireless communication method and related equipment thereof

Technical Field

The present application relates to the field of communications, and in particular, to a wireless communication method and related device.

Background

The cell reselection is cell reselection performed by the terminal based on the measured values of the serving cell and the surrounding cells in an idle state, and the cell handover refers to moving from one cell to another cell, and channel switching is performed after the terminal and the base station perform signaling interaction with the base station based on the measured values of the serving cell and the surrounding cells in a connected state in order to protect uninterrupted communication of a mobile user.

After cell reselection or cell handover, frame synchronization of a cell needs to be performed, so that data decoding needs to be performed on a Physical Broadcast Channel (PBCH) to acquire an SFN of the reselected cell and the handed cell, which has a certain time period. In a 5G new radio technology (NR) system, a time-frequency structure diagram of a synchronization signal Block (SS Block) is shown in fig. 1, and a Secondary Synchronization Signal (SSs), a Primary Synchronization Signal (PSS), and a PBCH data packet form the SS Block, and the three types of signals adopt the same transmission mode, so that the three types of signals can be received in a measurement stage, wherein a part of resources of the PBCH data packet is occupied by a physical broadcast channel demodulation reference signal (PBCH DMRS) and SSs, the PBCH DMRS and DMRS are used for measuring the quality of a cell signal, and the remaining resources of the PBCH data packet are used for receiving system information of the PBCH, and the system information includes an SFN. The general reselection handover procedure is: after receiving the reselection or handover message, the terminal reselects or switches to a certain cell, and queries the cell measurement result to obtain downlink synchronization information of the cell (the measurement process is that the terminal receives SS Block sent by the base station, and performs Reference Signal Received Power (RSRP) calculation according to SSs and PBCH DMRS in the SS Block to obtain the measurement result), when no downlink synchronization information exists in the measurement result, it is necessary to perform cell downlink synchronization first to obtain downlink synchronization information, and after performing cell downlink synchronization, it is not possible to know frame number information, so it is not possible to implement frame synchronization, so it is also necessary to re-obtain SS Block sent by the base station, blindly decode PBCH data packets to obtain System Frame Number (SFN) of the cell, and after implementing frame synchronization with the cell according to SFN, the terminal reports successful handover of the base station.

As can be seen, the process of cell reselection or handover is: the method comprises the steps that when a terminal measures the signal quality of a neighbor cell for the first time, the terminal receives SS Block of the neighbor cell sent by a base station, obtains a measurement result according to the SS Block, and then in the process of reselecting or switching the neighbor cell, the terminal needs to reacquire the SS Block of the neighbor cell so as to decode a PBCH data packet to obtain SFN of the neighbor cell, and the process of decoding to obtain the SFN has a preset time period, which means that the whole process of successfully reselecting or switching needs to wait for the time period, so that the time delay of reselecting or switching is increased, the interaction delay of the terminal and the base station is increased, and the performance of the whole communication system is influenced.

Disclosure of Invention

The embodiment of the application discloses a wireless communication method and related equipment thereof, which are used for a terminal to determine a system frame number SFN of a neighbor cell by using an SS Block received during the measurement of the signal quality of the neighbor cell.

A first aspect of the present application provides a wireless communication method, including:

after the terminal is connected with the base station, the terminal acquires a plurality of beams which are sent by the base station and carry the SS Block of the same cell, then the terminal calculates the signal quality of the neighbor cell by using each SS Block, and acquires the SS Block with the largest signal quality measurement value, so that the SS Block is reversely deduced and sent by which beam, namely, which beam carries the SS Block determined by the terminal is acquired from a plurality of beams sent by the base station, and then the data interaction between the terminal and the base station is carried out by using the beam.

As can be known from the time-frequency structure diagram of the SS Block, the SS Block includes a PBCH data packet and an SSs signal, and the PBCH data packet includes a physical broadcast channel demodulation reference signal PBCH DMRS.

And the terminal obtains a signal quality measurement result of the target cell by utilizing the PBCH DMRS and the SSS.

When the signal quality measurement result of the neighbor cell meets the preset condition, the terminal decodes the PBCH data packet in the SS Block to obtain the system frame number SFN of the neighbor cell, and when the terminal needs to perform cell reselection or cell switching subsequently, the SFN can be utilized to realize frame synchronization with the target cell.

The embodiment of the application has the following advantages: after acquiring the synchronous signal block of the neighbor cell, the terminal measures the signal quality of the neighbor cell according to the synchronous signal block, and when the signal quality of the neighbor cell meets the preset condition, the terminal determines the system frame number of the neighbor cell according to the synchronous signal block. In the embodiment of the application, the terminal obtains the system frame number of the neighbor cell according to the synchronization signal Block received in the phase of measuring the signal quality of the neighbor cell, and does not need to obtain the system frame number again from the base station when the system frame number needs to be used after the reselection or handover request message arrives, so that the time delay of reselection or handover is reduced.

Or,

a terminal receives a synchronous signal Block SS Block of a neighbor cell;

the terminal determines the signal quality of the neighbor cell according to the SS Block;

and when the signal quality of the neighbor cell meets a preset condition, the terminal determines the system frame number SFN of the neighbor cell according to the SS Block.

In the embodiment of the application, the terminal obtains the system frame number of the neighbor cell according to the synchronization signal Block received in the phase of measuring the signal quality of the neighbor cell, and does not need to obtain the system frame number again from the base station when the system frame number needs to be used after the reselection or handover request message arrives, so that the time delay of reselection or handover is reduced.

A second aspect of the present application provides a wireless communication method, comprising:

a terminal receives a synchronous signal Block SS Block of a neighbor cell;

and when the signal quality of the neighbor cell meets a preset condition and the terminal is in an idle state, the terminal determines a system frame number SFN of the neighbor cell according to the SS Block.

After acquiring the synchronous signal block of the neighbor cell, the terminal measures the signal quality of the neighbor cell according to the synchronous signal block, and when the signal quality of the neighbor cell meets the preset condition and the terminal is in an idle state, the terminal determines the system frame number of the neighbor cell according to the synchronous signal block. In the embodiment of the application, the terminal obtains the system frame number of the neighbor cell according to the synchronization signal Block received in the phase of measuring the signal quality of the neighbor cell, and does not need to obtain the system frame number again from the base station when the system frame number needs to be used after the reselection or handover request message arrives, so that the time delay of reselection or handover is reduced.

Based on the foregoing first aspect or the second aspect, in an optional implementation manner, after the terminal determines the SFN of the neighbor cell according to the SS Block, the method further includes:

the terminal stores the SFN of the neighbor cell;

and the terminal acquires the pre-stored SFN of the neighbor cell according to the identifier of the neighbor cell.

In this embodiment, since the cell reselection or handover may be performed after a period of time after the cell measurement process is completed, that is, the terminal does not perform the cell reselection or handover immediately after decoding the SFN, the terminal may query the randomly stored SFN of the neighbor cell according to the identifier of the neighbor cell.

In this embodiment, the identifier of the neighbor CELL may be a frequency point of the neighbor CELL and a CELL identification code CELL ID of the neighbor CELL.

In this embodiment, a method for acquiring the neighbor cell SFN by the terminal is introduced, so that the implementability of the scheme is increased.

Based on the foregoing aspects of the first aspect or the second aspect, in an optional implementation manner, the SFN is configured to perform frame synchronization with the neighbor cell when the terminal reselects to the neighbor cell.

In this embodiment, after performing signal measurement of a neighboring cell, a terminal performs reselection operation on a neighboring cell that meets a preset condition, and the SFN is used for performing frame synchronization with a neighboring cell in a reselection process.

In this embodiment, the role of the system frame number in cell reselection is introduced, so as to increase the implementability of the scheme.

Based on the foregoing scheme of the first aspect or the second aspect, in an optional implementation manner, the SFN is configured to perform frame synchronization with the neighbor cell when the terminal is handed over to the neighbor cell.

In this embodiment, after performing signal measurement of the neighboring cells, the terminal performs a handover operation on the neighboring cells meeting preset conditions, and the SFN is used for performing frame synchronization with the neighboring cells in the handover process.

In this embodiment, the role of the system frame number in cell handover is introduced, which increases the implementability of the scheme.

Based on the foregoing aspects of the first aspect or the second aspect, in an optional implementation manner, the method further includes:

and the terminal sends a response message to the base station, wherein the response message is used for indicating that the terminal is successfully switched to the neighbor cell.

In this embodiment, the terminal needs to communicate with the base station to perform the handover operation, and the base station sends the handover command through the RRC message before the terminal performs the handover procedure.

In this embodiment, a step is introduced in which the terminal performs sending of the response message to the base station after the terminal is successfully switched to the neighboring cell, so that the integrity of the scheme is increased.

Based on the foregoing aspects of the first aspect or the second aspect, in an optional implementation manner, the preset condition includes: the signal quality of the neighbor cell is better than the signal quality of the terminal serving cell.

In the embodiment, the specific situation of the preset condition is introduced, and the feasibility of implementation of the scheme is increased.

Based on the first aspect and the second to fourth implementation manners of the first aspect, in a sixth implementation manner of the first aspect, the preset condition further includes: the signal quality of the neighbor cell is greater than a first threshold.

In this embodiment, another specific case of the preset condition is introduced, increasing the diversity of the scheme.

Based on the foregoing aspects of the first aspect or the second aspect, in an optional implementation manner, the preset condition further includes: and the frequency point priority of the neighbor cell is greater than or equal to the frequency point priority of the terminal service cell, and the signal quality of the neighbor cell is greater than a second threshold value.

In this embodiment, a third specific case of the preset condition is introduced, increasing the flexibility of implementation of the diversity of the scheme.

Based on the foregoing scheme of the first aspect or the second aspect, in an optional implementation manner, before the terminal determines a system frame number SFN of the neighbor cell according to the SS Block, the method further includes:

and the terminal saves the SS Block.

In this embodiment, the terminal may not immediately determine the SFN after acquiring the SS Block, the SS Block may be stored first, and then the SFN is determined by using the stored offline data, that is, the SS Block, so that the diversity of the scheme is increased.

A third aspect of the present application provides a terminal, comprising:

a receiving unit, configured to receive a synchronization signal Block SS Block of a neighbor cell;

the processing unit is used for determining the signal quality of the neighbor cell according to the SS Block;

and the processing unit is further configured to determine the SFN of the neighbor cell according to the SSBlock when the signal quality of the neighbor cell satisfies a preset condition.

Based on the third aspect, in a first implementation manner of the third aspect, the terminal further includes a storage unit;

the storage unit is used for storing the SFN of the neighbor cell;

the processing unit is further configured to acquire the SFN of the neighbor cell according to the identifier of the neighbor cell.

Based on the first implementation manner of the third aspect, in a second implementation manner of the third aspect, the SFN stored by the storage unit is used for performing frame synchronization with the neighbor cell when the terminal reselects to the neighbor cell.

In a third implementation manner of the third aspect, based on the first implementation manner of the third aspect, the SFN stored in the storage unit is used for performing frame synchronization with the neighbor cell when the terminal switches to the neighbor cell.

Based on the third implementation manner of the third aspect, in a fourth implementation manner of the third aspect, the terminal further includes a transmitting unit;

the transmitting unit is configured to send a response message to the base station, where the response message is used to indicate that the terminal is successfully switched to the neighbor cell.

Based on the third aspect and the first to fourth implementation manners of the third aspect, in a fifth implementation manner of the third aspect, the preset condition includes: the signal quality of the neighbor cell is better than the signal quality of the terminal serving cell.

Based on the third aspect and the first to fourth implementation manners of the third aspect, in a sixth implementation manner of the third aspect, the preset condition further includes: the signal quality of the neighbor cell is greater than a first threshold.

Based on the third aspect and the first to fourth implementation manners of the third aspect, in a seventh implementation manner of the third aspect, the preset condition further includes: and the frequency point priority of the neighbor cell is greater than or equal to the frequency point priority of the terminal service cell, and the signal quality of the neighbor cell is greater than a second threshold value.

In an eighth implementation form of the third aspect, based on the third aspect and the first to fourth implementation forms of the third aspect,

the storage unit is also used for storing the SS Block.

A fourth aspect of the present application provides a terminal, comprising:

and the processing unit is further configured to determine the SFN of the neighbor cell according to the SS Block when the signal quality of the neighbor cell meets a preset condition and the terminal is in an idle state.

It is to be understood that the above alternatives of the third aspect may also be implemented in combination with the embodiments of the fourth aspect, and will not be described herein.

A fifth aspect of the present application provides a terminal, comprising:

the receiver is used for receiving a synchronous signal Block SS Block of a neighbor cell;

a processor for determining the signal quality of the neighbor cell from the SS Block;

and the processor is further configured to determine the SFN of the neighbor cell according to the SSBlock when the signal quality of the neighbor cell satisfies a preset condition.

In a first implementation form of the fifth aspect, based on the fifth aspect, the terminal further comprises a storage;

the memory is used for storing the SFN of the neighbor cell;

the processor is further configured to acquire the SFN of the neighbor cell according to the identifier of the neighbor cell.

In a second implementation manner of the fifth aspect, based on the first implementation manner of the fifth aspect, the SFN stored in the storage is used for frame synchronization with the neighbor cell when the terminal reselects to the neighbor cell.

In a fifth implementation manner of the fifth aspect, based on the first implementation manner of the fifth aspect, the SFN stored in the storage is used for frame synchronization with the neighbor cell when the terminal switches to the neighbor cell.

In a fourth implementation form of the fifth aspect, based on the fifth implementation form of the fifth aspect, the terminal further comprises a transmitter;

the transmitter is configured to send a response message to the base station, where the response message is used to indicate that the terminal is successfully switched to the neighbor cell.

In a fifth implementation manner of the fifth aspect, based on the fifth aspect and the first to fourth implementation manners of the fifth aspect, the preset condition includes: the signal quality of the neighbor cell is better than the signal quality of the terminal serving cell.

In a sixth implementation manner of the fifth aspect, based on the fifth aspect and the first to fourth implementation manners of the fifth aspect, the preset condition further includes: the signal quality of the neighbor cell is greater than a first threshold.

In a seventh implementation manner of the fifth aspect, based on the fifth aspect and the first to fourth implementation manners of the fifth aspect, the preset condition further includes: and the frequency point priority of the neighbor cell is greater than or equal to the frequency point priority of the terminal service cell, and the signal quality of the neighbor cell is greater than a second threshold value.

In an eighth implementation form of the fifth aspect, based on the fifth aspect and the first to fourth implementation forms of the fifth aspect,

the storage is also used for saving the SS Block.

A sixth aspect of the present application provides a terminal, comprising:

and the processor is further configured to determine the SFN of the neighbor cell according to the SS Block when the signal quality of the neighbor cell satisfies a preset condition and the terminal is in an idle state.

A seventh aspect of the present application provides a chip system, which is applied to a communication device, the communication device further including a transceiver, wherein the chip system includes a memory, an interface circuit, and a processor, and the transceiver, the memory, and the processor are interconnected by a line;

wherein,

the transceiver is used for receiving a synchronization signal Block SS Block of a neighbor cell;

the memory having stored therein instructions for execution by the processor to perform operations for determining signal quality of the neighbor cell from the SSBlock;

the processor is further configured to perform an operation of determining the SFN of the neighbor cell according to the SS Block when the signal quality of the neighbor cell satisfies a preset condition.

In a first implementation manner of the seventh aspect, based on the seventh aspect, the memory stores instructions, and the instructions are executed by the processor to perform the method described in any one of the first to eighth implementation manners of the first aspect.

An eighth aspect of the present application provides a chip system, which is applied to a communication device, the communication device further includes a transceiver and a storage, and the chip system is characterized in that the chip system includes an interface circuit and a processor, and the transceiver, the storage and the processor are interconnected through a line;

wherein,

the processor is further configured to perform an operation of determining the SFN of the neighbor cell according to the SSBlock when the signal quality of the neighbor cell satisfies a preset condition.

In a first implementation form of the eighth aspect, based on the eighth aspect, the memory of the communication device stores instructions, and the instructions are executed by the processor to perform the method described in any one of the first to eighth implementation forms of the first aspect.

A ninth aspect of the present application provides a chip system, which is applied to a communication device, the communication device further comprising a transceiver and a storage, wherein the chip system comprises an interface circuit and a processor, and the transceiver, the storage and the processor are interconnected by a line;

wherein,

the processor is further configured to perform an operation of determining the SFN of the neighbor cell according to the SS Block when the signal quality of the neighbor cell satisfies a preset condition and the terminal is in an idle state.

A tenth aspect of the present application provides a computer-readable storage medium having stored therein instructions, which when run on a computer, cause the computer to perform receiving a synchronization signal block, SSBlock, of a neighbor cell;

determining the signal quality of the neighbor cell according to the SS Block;

and when the signal quality of the neighbor cell meets a preset condition, determining a System Frame Number (SFN) of the neighbor cell according to the SS Block.

Based on the tenth aspect, in a first implementation manner of the tenth aspect of the present application, when the instructions are executed on a computer, the computer further executes the method described in any one of the first to eighth implementation manners of the first aspect.

An eleventh aspect of the present application provides a computer-readable storage medium having stored therein instructions, which when run on a computer, cause the computer to perform receiving a synchronization signal block, SSBlock, of a neighbor cell;

determining the signal quality of the neighbor cell according to the SS Block;

and when the signal quality of the neighbor cell meets a preset condition and the terminal is in an idle state, determining the SFN of the neighbor cell according to the SS Block.

A twelfth aspect of the application provides a computer program product containing instructions which, when run on a computer, cause the computer to perform receiving a synchronization signal Block SS Block of a neighbor cell;

determining the signal quality of the neighbor cell according to the SS Block;

Based on the twelfth aspect, in the first implementation manner of the twelfth aspect of the present application, when the computer program product runs on a computer, the computer is further caused to perform the method described in any one of the implementation manners of the first to eighth implementation manners of the first aspect.

A thirteenth aspect of the application provides a computer program product containing instructions which, when run on a computer, cause the computer to perform receiving a synchronization signal Block SS Block of a neighbor cell;

determining the signal quality of the neighbor cell according to the SS Block;

and when the signal quality of the neighbor cell meets a preset condition and the terminal is in an idle state, determining a System Frame Number (SFN) of the neighbor cell according to the SS Block.

Drawings

FIG. 1 is a time-frequency structure diagram of a synchronization signal block according to the present application;

fig. 2 is a schematic diagram of an embodiment of a wireless communication method according to an embodiment of the present application;

FIG. 3 is a schematic diagram of another embodiment of a method of wireless communication according to an embodiment of the present application;

fig. 4 is a schematic diagram of another embodiment of a wireless communication method according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of a terminal according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of another terminal according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of another terminal according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of another terminal according to an embodiment of the present application.

Detailed Description

The terms "first," "second," and the like in the description and in the claims of the present application and in the above-described drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances and are merely descriptive of the various embodiments of the application and how objects of the same nature can be distinguished. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of elements is not necessarily limited to those elements, but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

In the embodiment of the present application, a terminal serving cell refers to a certain base station (or coverage of a certain base station) where the terminal is located, and a neighbor cell of the terminal refers to another base station (or coverage of another base station) different from the base station.

As shown in fig. 1, a time-frequency structure diagram of a synchronization signal block is that, firstly, a PSS, an SSS, and two PBCHs constitute 4 orthogonal frequency division multiplexing (PBCH) symbols, the PSS occupies 127 subcarriers, the SSS occupies 127 subcarriers, and a part of subcarrier resources are idle, and in addition, the remaining subcarrier resources are occupied by the PBCH, wherein a subcarrier resource of 1/4 in the PBCH is occupied by a PBCH DMRS, and the remaining 3/4 is occupied by a PBCH packet. The PBCH DMRS and SSS are used for measuring the signal quality of the cell, and the PBCH data packet is used for decoding to acquire system information.

It can be understood that the PSS, the SSS, the number of subcarriers occupied by the two PBCHs, and the number of subcarriers occupied by the PBCH DMRS may change due to subsequent protocol adjustments, which is not limited herein.

In an LTE system, a PSS and an SSS may implement downlink synchronization together, after a terminal obtains the PSS, since the position of the PSS in a time domain is fixed, there are two PSS in one system frame and the two PSS are the same, the terminal does not know whether the solved PSS is the first or the second, and the terminal can only obtain 5ms timing of the cell, and then the terminal blindly detects the SSS, and after the SSS is solved, it is determined whether the SSS is located in subframe 0 or subframe 5, and further, it is determined where subframe 0 is located in the system frame, that is, 10ms timing. Combining the PSS and the SSS, the terminal determines the position of a subframe 0 in a system frame, realizes the downlink synchronization of a cell, namely intra-frame synchronization, and also determines CP configuration and the like, but does not know the system frame number at the moment, and further decodes PBCH to obtain system information, thereby obtaining the system frame number and completing frame synchronization.

In the existing NR system, a terminal performs cell downlink synchronization with a neighbor cell while performing signal quality measurement of the neighbor cell, and first acquires a synchronization signal block, determines intra-cycle timing of the synchronization signal block according to a PSS signal, and performs downlink synchronization, that is, intra-frame synchronization with the neighbor cell. And then, the PBCH data packet is waited to be decoded to obtain the SFN, and then the SFN is synchronized with the neighbor cell, and the timing of the cell is adjusted, so that the whole synchronization process with the neighbor cell is completed. In the existing NR, in the cell reselection or handover process, after a terminal acquires a synchronization signal block sent by a base station, the terminal measures the signal quality of a neighboring cell, the terminal measures a neighboring cell at regular intervals, so as to obtain a signal quality measurement result of the neighboring cell, the synchronization signal block is lost after the measurement is completed, when the terminal reselects or switches to the neighboring cell, at this moment, the terminal needs to acquire the synchronization signal block sent by the base station again to decode to obtain the SFN, and the process of decoding to obtain the SFN needs a certain time, so that the time delay of reselection or switching is increased.

The embodiment of the application provides a wireless communication method, and a terminal obtains an SFN (single frequency network) by using a synchronous signal block obtained when the quality of a signal in a neighboring cell is measured, so that the terminal does not need to obtain the synchronous signal block when the SFN is required to be used in the subsequent process. Referring to fig. 2, the following description will be made.

201. A terminal receives a synchronous signal Block SS Block of a neighbor cell;

in this embodiment, the synchronization signal block includes PSS, SSS, and PBCH packet, where the PBCH packet has 1/4 frequency domain resources occupied by PBCH DMRS. The SSS and the PBCH DMRS are used for measuring the signal quality of the neighbor cell, and the remaining 3/4 frequency domain resources of the PBCH data packet can be used for carrying out data decoding to obtain the system information of the neighbor cell, wherein the system information comprises the system frame number SFN of the neighbor cell.

The base station transmits the data Block according to different IP addresses of each cell so as to transmit different SS blocks to the terminal.

In this embodiment, the synchronization signal block of the neighbor cell is transmitted to the terminal by the base station using a beam pair, where the beam pair refers to a transmitting beam of the base station and a receiving beam of the terminal, and thereafter, data interaction between the base station and the terminal is data transmission through the Beam Pair (BPL).

The terminal can acquire the synchronization signal block by using the beam pair and then measure the signal quality of the neighboring cell by using the synchronization signal block. The method comprises the steps that a wave beam pair which is acquired by a terminal and sent by a base station is not a single wave beam pair, the base station can send a plurality of wave beam pairs to the terminal, each wave beam pair carries a synchronous signal block of the same neighbor cell, the terminal decodes each synchronous signal block after acquiring the plurality of wave beam pairs to obtain the signal quality of the neighbor cell, then the synchronous signal block with the maximum signal quality measurement value is obtained, and the synchronous signal block with the maximum signal quality measurement value is reversely deduced from which wave beam the synchronous signal block with the maximum signal quality measurement value is sent, so that the wave beam pair which corresponds to the synchronous signal block with the maximum signal quality measurement value is determined to be the wave beam pair required by the terminal, and then the terminal carries out subsequent data interaction with the base station.

In the description of the above beam pair, the terminal may distinguish each beam pair according to synchronization signal Block indication information (SS Block index) carried in a synchronization signal Block transmitted by the base station to the terminal. Examples are as follows: the base station sends four beam pairs of a1, a2, a3 and a4 to the terminal, the four beam pairs are all used for transmitting the synchronous signal blocks of the same neighbor cell, each synchronous signal block carries different synchronous signal block indication information, the terminal can distinguish different beam pairs of a1, a2, a3 and a4 according to the indication information, the terminal receives a1, a2, a3 and a4 and then measures the signal quality of the neighbor cell according to the synchronous signal blocks carried in each beam pair, one possible situation is that the signal quality of the neighbor cell obtained by measuring the synchronous signal blocks carried in a1 is the maximum, and the terminal carries out data interaction with the base station by using a1 in the subsequent process.

In a possible design of the embodiment of the present application, a specific manner in which the indication information is carried by the synchronization signal block may include:

A. when the beam pair is used for transmitting low-frequency signals, the indication information is only 3 bits, and the indication information of the 3 bits is carried by the PBCH DMRS sequence.

B. When the wave beam pair is used for sending high-frequency signals, the indication information has 6 bits, the PBCH DMRS sequence carries 3-bit indication information, and the PBCH data packet of the synchronous signal block carries the other 3-bit indication information.

202. The terminal determines the signal quality of the neighbor cell according to the SS Block;

and the terminal measures the signal quality of the neighbor cell by utilizing the SSS and the DMRS of the PBCH in the synchronization signal block to obtain the signal quality measurement result of the neighbor cell.

In the present embodiment, one possible case is: the terminal can store the synchronous signal block while obtaining the cell measurement result, and the synchronous signal block is used for obtaining the system frame number of the neighbor cell, so that when the terminal needs to use the SFN, the terminal does not need to reacquire the synchronous signal block from the base station again for decoding, and therefore cell reselection or switching can be directly carried out according to the SFN, and time delay of reselection or switching is reduced.

203. And when the signal quality of the neighbor cell meets the preset condition, the terminal determines the system frame number SFN of the neighbor cell according to the SS Block.

In this embodiment, the specific way for the terminal to determine the system frame number SFN of the neighbor cell according to SS Block is as follows: and the terminal decodes part of data in the SS Block to obtain a system frame number SFN of the neighbor cell.

In this embodiment, one possible condition for performing the step of determining the system frame number SFN of the neighbor cell from SS Block is when the terminal needs to be in an idle state.

It should be noted that, in the frequency domain resources, 1/4 of the PBCH packet with the fast synchronization signal is occupied by the PBCH DMRS, and therefore, the PBCH packet is specifically used for decoding and determining the frequency domain resources of 3/4 that achieve frame synchronization with the neighbor cell after determining the SFN.

In this embodiment of the present application, the preset conditions may include:

firstly, the signal quality of a neighbor cell is superior to that of a terminal service cell;

in this embodiment, when the signal quality of the neighbor cell is better than the signal quality of the terminal serving cell, the terminal may determine the system frame number SFN of the neighbor cell according to the synchronization signal block.

In a specific implementation manner, a terminal utilizes a PBCH DMRS and an SSS to implement measurement of the same parameter of the same signal, demodulates a physical broadcast channel PBCH to determine a first measurement result, and utilizes the SSS to determine a second measurement result, and then combines the first measurement result and the second measurement result to obtain a signal quality measurement result of a neighbor cell.

Further, the signal quality of the neighbor cell specifically includes:

A. reference signal received power, RSRP;

and when the RSRP value of the signal of the neighbor cell is larger than the RSRP of the terminal service cell, the terminal executes the step of determining the SFN of the neighbor cell.

In this implementation, the RSRP value of the neighbor cell is obtained by combining the RSRP value measured by the PBCH DMRS and the RSRP value measured by the SSS, and specifically, the terminal adds the product of the weight coefficient of the preset first measurement result and the first measurement result to the product of the weight coefficient of the preset second measurement result and the second measurement result to obtain the signal quality measurement result of the neighbor cell. For example, the RSRP of the neighbor cell measured by the terminal using PBCH DMRS is X1, the RSRP of the neighbor cell measured by the terminal using SSS is X2, and the corresponding weight coefficients are 2/5 and 3/5, respectively, so the RSRP value of the neighbor cell signal is 2/5X1+ 3/X2.

B. Reference signal received quality, RSRQ;

when the value of the RSRQ (reference signal received quality) of the neighbor cell signal is larger than the RSRQ of the terminal service cell, the terminal executes the step of determining the system frame number SFN of the neighbor cell.

In this implementation, the RSRQ value of the neighbor cell is obtained by combining the RSRP value measured by the PBCH DMRS and the RSRQ value measured by the SSS, and the specific example is similar to the case a described above, and is not described here again.

C. A combination of reference signal received power, RSRP, and reference signal received quality, RSRQ;

in this embodiment, the final value of the signal quality of the neighbor cell may be calculated by the terminal according to different weight coefficients occupied by the reference signal received power RSRP and the reference signal received quality RSRQ. For example, the terminal first obtains a first measurement result corresponding to the neighbor cell by using the PBCH mrss, and determines that the first measurement result includes measurement values corresponding to a plurality of parameters, for example, the terminal determines a first measurement result of the neighbor cell by using the PBCH DMRS, where the first measurement result includes values of RSRP and RSPQ, which are X1 and Y1, respectively.

Similarly, the terminal obtains a second measurement result corresponding to the target cell by using the SSS, and also obtains a plurality of measurement values of the same various parameters. The plurality of measurement values are then determined to be second measurement results of the neighbor cells, e.g., the terminal determines second measurement results of the neighbor cells using SSS, the second measurement results including RSRP and RSRQ values, X2 and Y2, respectively.

The terminal first finds the sum X1+ X2 ═ X and Y1+ Y2 ═ Y of the same parameter in the two measurements, and then determines the weighting factors, for example, RSRP, which is 2/5 and 3/5 respectively, and the signal quality measurement result of the neighbor cell is 2/5X + 3/5Y.

It can be understood that the above are only three methods for measuring the signal quality of the neighbor cell in this embodiment, and the measurement of the signal quality of the neighbor cell in this embodiment may also include more other implementation manners, which is not limited herein.

And secondly, the signal quality of the neighbor cell is greater than a first threshold value.

In this embodiment, when the signal quality of the neighbor cell is greater than the first threshold value, the terminal may determine the SFN of the neighbor cell according to the synchronization signal block.

In this embodiment, the specific situation of the signal quality of the neighbor cell is similar to the three situations listed in the aforementioned A, B, C, and details thereof are not repeated here.

Further, the first threshold value may be lower than the signal quality value of the terminal serving cell.

In this embodiment, even if the signal quality of the neighbor cell is not better than the signal quality of the terminal serving cell, but the signal quality of the neighbor cell is greater than the first threshold, the terminal also performs the step of determining the system frame number SFN of the neighbor cell according to the SS Block.

And thirdly, the frequency point priority of the neighbor cell is greater than or equal to the frequency point priority of the terminal service cell, and the signal quality of the neighbor cell is greater than a second threshold value.

In this embodiment, the terminal may preferentially select a cell with a high frequency point priority, and when the neighbor cell and the terminal serving cell are pilot cells, when the priority of the frequency point occupied by the neighbor cell is greater than the priority of the frequency point of the terminal serving cell, or when the priority of the frequency point occupied by the neighbor cell is equal to the priority of the frequency point of the terminal serving cell, the terminal may compare the signal quality of the neighbor cell with the second threshold, and at this time, when the signal quality of the neighbor cell is greater than the second threshold, the terminal may determine the SFN of the neighbor cell according to the synchronization signal block.

Likewise, the second threshold value may be lower than the signal quality value of the terminal serving cell.

In this embodiment, even if the signal quality of the neighbor cell is not better than the signal quality of the terminal serving cell, the frequency point priority of the neighbor cell is greater than or equal to the frequency point priority of the terminal serving cell, and the signal quality of the neighbor cell is greater than the second threshold, the terminal also executes the step of determining the system frame number SFN of the neighbor cell according to the SS Block.

In this embodiment, before decoding the synchronization signal block of the neighbor cell to obtain the system frame number, it is determined whether the signal quality of the neighbor cell meets the preset condition, so as to avoid resource waste caused by frequently decoding the synchronization signal block of the cell.

In this embodiment, the terminal can obtain the SFN from the neighbor cell by obtaining the synchronization signal block of the neighbor cell and determining the signal quality of the neighbor cell according to the synchronization signal block, and then decode the synchronization signal block to obtain the SFN from the neighbor cell when the signal quality of the neighbor cell meets the preset condition, so as to achieve the purpose of determining the SFN of the neighbor cell when the signal quality of the neighbor cell is measured, and thus when the SFN is needed in the subsequent process, the SFN is obtained without re-obtaining the synchronization signal block of the neighbor cell, and the time delay of obtaining the synchronization signal block of the neighbor cell and determining the SFN according to the synchronization signal block is reduced.

In this embodiment, after determining the SFN, the terminal may first store the SFN, and then acquire the stored SFN when performing a subsequent series of operations, such as cell reselection or cell handover, please refer to fig. 3, which will be described below:

301. a terminal receives a synchronous signal Block SS Block of a neighbor cell;

302. the terminal determines the signal quality of the neighbor cell according to the SS Block;

303. and when the signal quality of the neighbor cell meets the preset condition, the terminal determines the system frame number SFN of the neighbor cell according to the SS Block.

In this embodiment, embodiment steps 301 to 303 are similar to embodiment steps 201 to 203 described above, and detailed description thereof is omitted here.

304. The terminal stores SFN of the neighbor cell;

generally, cell measurement is a continuous process, and in the process of first cell measurement by a terminal, after decoding to obtain an SFN, cell reselection or handover may not be performed immediately, so that the SFN may be stored first, and when the SFN needs to be used, the terminal queries the stored SFN again. Meanwhile, in the subsequent adjacent cell signal quality measurement process, the SFN of the adjacent cell is detected to be obtained by decoding, so that the secondary decoding is not carried out.

305. And the terminal acquires the SFN of the neighbor cell according to the identifier of the neighbor cell.

In this embodiment, each CELL has a unique identifier, which is a combination of a frequency point of a neighboring CELL and a CELL identification code CELL ID (i.e., the above-mentioned physical CELL ID), and since each frequency point may correspond to multiple CELLs, determining a CELL according to the frequency point can only reduce the range of the determined CELL, and therefore, final CELL positioning needs to be performed by combining the CELL ID.

The specific implementation process is that the terminal firstly determines at least one CELL corresponding to the frequency point, then the terminal determines a neighbor CELL in the at least one CELL according to the CELL ID, and finally the terminal queries to obtain the SFN of the neighbor CELL.

In the wireless communication method provided in this embodiment, the system information of the neighboring cell includes various contents, which specifically include:

first, the system frame number SFN of the neighbor cell.

And A1, when the terminal reselects to the neighbor cell, the terminal performs frame synchronization with the neighbor cell through the SFN.

In this embodiment, cell reselection is cell reselection that is completed when the terminal is in an idle state.

In this embodiment, when the terminal reselects to a neighbor cell, the neighbor cell signal measurement stage has completed cell downlink synchronization, and at this time, the terminal only needs to align the system frame number of the terminal with the system frame number of the neighbor cell according to the obtained SFN, that is, to implement frame synchronization with the neighbor cell.

B1, when the terminal switches to the neighbor cell, the terminal performs frame synchronization with the neighbor cell through SFN.

In this embodiment, the cell handover is handover of a cell in which the terminal is in a communication state.

In this embodiment, the terminal needs to perform signaling interaction with the base station for cell handover, receives an RRC (radio resource control) message sent by the base station, and then performs a cell handover operation according to the RRC message.

In this embodiment, when the terminal is switched to the neighbor cell, the neighbor cell signal measurement stage has completed cell downlink synchronization, and at this time, the terminal only needs to align the system frame number of the terminal with the system frame number of the neighbor cell according to the obtained SFN, that is, to implement frame synchronization with the neighbor cell.

Further, in this embodiment, when the terminal is switched to the neighbor cell, and after the terminal performs frame synchronization with the neighbor cell through the SFN, the wireless communication method provided in this embodiment further includes:

b2, the terminal sends response message to the base station.

In this embodiment, after the terminal is successfully switched to the neighbor cell, a response message needs to be sent to the base station to notify the base station that the switching is successful. If the handover fails, the base station may receive another response message indicating the handover failure.

And secondly, configuration information of the neighbor cell.

In this embodiment, the configuration information may be system bandwidth, PHICH resource, number of antennas, and the like of the neighbor cell.

And after the terminal is switched to the neighbor cell, the terminal can normally work in the neighbor cell according to the configuration information.

In the embodiment of the application, the function of the system information after the terminal determines the system information is explained, so that the feasibility of the scheme is improved.

In an embodiment of the present application, when the terminal performs the operations described in fig. 2 and fig. 3, the terminal may perform information interaction with the base station, please refer to fig. 4, where an embodiment of the present application provides a wireless communication method, including:

401. a base station sends a synchronous signal Block SS Block of a neighbor cell to a terminal;

402. the terminal determines the signal quality of the neighbor cell according to the SS Block;

403. the terminal determines a system frame number SFN of the neighbor cell according to the SS Block;

the steps in embodiments 401 to 403 of the present application are similar to those in embodiments 201 to 203, and are not described herein again.

404. When the terminal is switched to a neighbor cell, the terminal performs frame synchronization with the neighbor cell according to the SFN;

405. and the base station receives the response message sent by the terminal.

The steps described in embodiments 404 and 405 of the present application are similar to steps B1 and B2 in embodiment 305 described above, and are not repeated here.

The embodiment describes the situation that the terminal sends the response message to the base station after the terminal is successfully switched to the neighbor cell, so that the completeness of the scheme is improved.

While fig. 2 to 4 describe the embodiment of the present application from the perspective of a wireless communication method, referring to fig. 5, the embodiment of the present application will be described below from the perspective of a terminal.

A receiving unit 501, configured to receive a synchronization signal Block SS Block of a neighbor cell;

a processing unit 502, configured to determine the signal quality of the neighbor cell according to the SS Block;

the processing unit 502 is further configured to determine an SFN of the neighbor cell according to the SS Block when the signal quality of the neighbor cell meets a preset condition.

In this embodiment, after the terminal searches for a signal and searches for a neighbor cell, the terminal receives an SSBlock of the neighbor cell, and measures the signal quality of the neighbor cell using the SSBlock, and when the result of measuring the signal quality of the neighbor cell satisfies a preset condition, the terminal obtains an SFN of the neighbor cell according to the SS Block, so that the SFN can be directly used when the SFN is needed in a subsequent process, without reacquiring the SS Block and then determining the SFN of the neighbor cell.

In this embodiment, after determining the SFN, the terminal may now store the SFN, please refer to fig. 6, which will be described below.

A receiving unit 601, configured to receive a synchronization signal Block SS Block of a neighbor cell;

a processing unit 602, configured to determine the signal quality of the neighbor cell according to the SS Block;

the processing unit 602 is further configured to determine an SFN of the neighbor cell according to the SS Block when the signal quality of the neighbor cell meets a preset condition.

The terminal also comprises a storage unit;

the storage unit 603 is configured to store the SFN of the neighbor cell;

the processing unit 602 is further configured to obtain an SFN of the neighbor cell according to the identifier of the neighbor cell.

It is possible that the SFN stored in the storage unit is used for frame synchronization with the neighbor cell when the terminal reselects to the neighbor cell.

Another possible case is that the SFN stored in the storage unit is used for frame synchronization with the neighbor cell when the terminal is handed over to the neighbor cell.

In this embodiment, the terminal may store the determined SFN first, and then the subsequent terminal acquires the SFN again for use, so that the practicability of implementation of the scheme is increased.

In this embodiment, when the terminal performs cell handover, the base station needs to be notified of successful handover after successful handover, please refer to fig. 7, which will be described below;

a receiving unit 701, configured to receive a synchronization signal Block SS Block of a neighbor cell;

a processing unit 702, configured to determine the signal quality of the neighbor cell according to the SS Block;

the processing unit 702 is further configured to determine an SFN of the neighbor cell according to the SS Block when the signal quality of the neighbor cell meets a preset condition.

The terminal also comprises a transmitting unit;

the transmitting unit 703 is configured to send a response message to the base station, where the response message is used to indicate that the terminal is successfully switched to the neighbor cell.

In this embodiment, it is a possible case that the preset conditions include: the signal quality of the neighbor cell is better than the signal quality of the terminal serving cell.

Another possible case is that the preset condition further includes: the signal quality of the neighbor cell is greater than a first threshold.

It is also possible that the preset conditions further include: and the frequency point priority of the neighbor cell is greater than or equal to the frequency point priority of the terminal service cell, and the signal quality of the neighbor cell is greater than a second threshold value.

In this embodiment, the steps of the terminal sending the response message to the base station after the handover to the neighboring cell is successful are described, and several situations of the preset conditions are introduced, so that the diversity of the scheme is increased.

In this embodiment, referring to fig. 6, the storage unit is further configured to store the SS Block.

And the processing unit is further configured to execute the step of determining a System Frame Number (SFN) of the neighbor cell according to the SS Block when the terminal is in an idle state.

In this embodiment, the step of determining the system frame number SFN of the neighbor cell according to the SS Block is limited to be triggered only when the terminal is in an idle state, so that the implementability of the scheme is increased.

Referring to fig. 8, a terminal device 800 according to another embodiment of the present application is described below, where:

a receiver 801, a transmitter 802, a processor 803 and a memory 804 (wherein the number of processors 803 in the terminal device 800 may be one or more, one processor is taken as an example in fig. 8). In some embodiments of the present application, the receiver 801, the transmitter 802, the processor 803 and the memory 804 may be connected by a bus or other means, wherein fig. 8 illustrates the connection by a bus.

The memory 804 may include a read-only memory and a random access memory, and provides instructions and data to the processor 803. A portion of the memory 804 may also include NVRAM. The memory 804 stores an operating system and operating instructions, executable modules or data structures, or a subset or an expanded set thereof, wherein the operating instructions may include various operating instructions for performing various operations. The operating system may include various system programs for implementing various basic services and for handling hardware-based tasks.

The processor 803 controls the operation of the terminal device, and the processor 803 may also be referred to as a CPU. In a specific application, the various components of the terminal device are coupled together by a bus system, wherein the bus system may include a power bus, a control bus, a status signal bus, etc., in addition to a data bus. For clarity of illustration, the various buses are referred to in the figures as a bus system.

The method disclosed in the embodiments of the present application can be applied to the processor 803 or implemented by the processor 803. The processor 803 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware or instructions in the form of software in the processor 803. The processor 803 described above may be a general purpose processor, a DSP, an ASIC, an FPGA or other programmable logic device, discrete gate or transistor logic device, discrete hardware components. The various methods, steps, and logic blocks disclosed in the embodiments of the present application 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 application 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 804, and the processor 803 reads the information in the memory 804 to complete the steps of the method in combination with the hardware thereof.

In this embodiment, the processor 803 is configured to execute the foregoing information processing method.

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 several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, a division of a unit is merely a logical division, and an actual implementation may have another division, 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.

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.

In addition, functional units in the embodiments of the present application 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 integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit 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 application may be substantially implemented or contributed to by the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a local client, or a network device) to execute all or part of the steps of the method in the embodiments of fig. 2 to 4 of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

Claims

1. A method of wireless communication, comprising:

a terminal receives a synchronous signal Block SS Block of a neighbor cell;

2. The method of claim 1, wherein after the terminal determines the SFN of the neighbor cell from the SS Block, the method further comprises:

the terminal stores the SFN of the neighbor cell;

and the terminal acquires the SFN of the neighbor cell according to the identifier of the neighbor cell.

3. The method of claim 2, wherein the SFN is to frame synchronize with the neighbor cell when the terminal reselects to the neighbor cell.

4. The method of claim 2, wherein the SFN is to frame synchronize with the neighbor cell when the terminal is handed over to the neighbor cell.

5. The method of claim 4, further comprising:

6. The method according to any one of claims 1 to 4, wherein the preset conditions include: the signal quality of the neighbor cell is better than the signal quality of the terminal serving cell.

7. The method according to any one of claims 1 to 4, wherein the preset conditions further comprise: the signal quality of the neighbor cell is greater than a first threshold.

8. The method according to any one of claims 1 to 4, wherein the preset conditions further comprise: and the frequency point priority of the neighbor cell is greater than or equal to the frequency point priority of the terminal service cell, and the signal quality of the neighbor cell is greater than a second threshold value.

9. The method according to any of claims 1-4, wherein before the terminal determines the system frame number SFN of the neighbor cell from the SS Block, the method further comprises:

and the terminal saves the SS Block.

10. The method according to any of claims 1 to 4, wherein the terminal determines a System Frame Number (SFN) of the neighbor cell according to the SS Block, comprising:

and when the terminal is in an idle state, the terminal executes the step of determining the system frame number SFN of the neighbor cell according to the SS Block.

11. A terminal, comprising:

and the processor is further configured to determine the SFN of the neighbor cell according to the SS Block when the signal quality of the neighbor cell satisfies a preset condition.

12. The terminal of claim 11, further comprising a memory;

the memory is used for storing the SFN of the neighbor cell;

13. The terminal of claim 12, wherein the SFN stored in the memory is configured to frame synchronize with the neighbor cell when the terminal reselects to the neighbor cell.

14. The terminal of claim 12, wherein the SFN stored in the storage is configured to frame synchronize with the neighbor cell when the terminal switches to the neighbor cell.

15. The terminal of claim 14, wherein the terminal further comprises a transmitter;

16. The terminal according to any of claims 11 to 15, wherein the preset conditions comprise: the signal quality of the neighbor cell is better than the signal quality of the terminal serving cell.

17. The terminal according to any of claims 11 to 15, wherein the preset conditions further comprise: the signal quality of the neighbor cell is greater than a first threshold.

18. The terminal according to any of claims 11 to 15, wherein the preset conditions further comprise: and the frequency point priority of the neighbor cell is greater than or equal to the frequency point priority of the terminal service cell, and the signal quality of the neighbor cell is greater than a second threshold value.

19. The terminal according to any of the claims 11 to 15,

the storage is also used for saving the SS Block.

20. The terminal according to any of the claims 11 to 15,

the processor is specifically configured to execute the step of determining a system frame number SFN of the neighbor cell according to the SS Block when the terminal is in an idle state.

21. A chip system, the chip system being applied to a communication device, the communication device further comprising a transceiver, characterized in that the chip system comprises a memory, an interface circuit and a processor, the transceiver, the memory and the processor being interconnected by a line;

wherein,

the memory having stored therein instructions for execution by the processor to perform operations for determining signal quality of the neighbor cell from the SS Block;

22. The chip system according to claim 21, comprising: the memory has stored therein instructions for execution by the processor to perform the operations of the terminal in the method of any of claims 2-9.

23. A chip system, the chip system being applied to a communication device, the communication device further comprising a transceiver, characterized in that the chip system comprises a memory, an interface circuit and a processor, the transceiver, the memory and the processor being interconnected by a line;

wherein,

24. A computer-readable storage medium comprising instructions that, when executed on a computer, cause the computer to perform the method of any of claims 1 to 9.

25. A computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of any one of claims 1 to 9.