CN101651877A - Method, system and device for allocating and measuring gap - Google Patents

Abstract

The embodiment of the invention discloses a method, system and equipment for configuring measurement gaps, which belong to the communication field. The method includes: the terminal obtains the time when the system frame number SFN of the target cell, the time used for switching, the gap activation time startSFN set by the target cell, and the effective configuration range of startSFN; Valid configuration range, get the execution range of startSFN; judge whether the obtained startSFN is within the execution range, and if so, perform gap-based measurement. The system includes: a terminal and a base station. The device includes: an acquisition module, a judgment module and an execution module. By setting the effective configuration range for the activation time startSFN of the gap, setting the last deadline for the terminal to obtain the system frame number SFN of the target cell, setting the restart time point for performing gap-based measurement, and setting the revalidation time for performing gap-based measurement, etc. In this way, the terminal and the target cell are kept in step to perform the gap-based measurement to avoid confusion.

Description

A method, system and device for configuring a measurement gap

technical field

The present invention relates to the communication field, in particular to a method, system and equipment for configuring measurement gaps.

Background technique

In the UMTS (Universal Mobile Telecommunications System, universal mobile communication system) system, during the handover process of the terminal from the source cell to the target cell, the target cell will re-issue the measurement configuration information. Therefore, the measurement configuration previously issued by the source cell will be no longer valid. However, in the current LTE (Long Term Evolve, long-term evolution system), the above-mentioned measurement configuration issued by the source cell can continue to be valid. In addition, the target cell can issue the measurement configuration information to the terminal before the terminal executes the handover through the handover command , so that the terminal can perform the configuration measurement of the target cell after receiving the handover command carrying the measurement configuration information.

LTE stipulates that for inter-frequency and inter-system measurements, it is usually necessary to configure a measurement gap (gap), where the role of the gap is to make the following agreement between the terminal and the base station: within a certain period of time (for example, the period is 40ms or 120ms) A short period of time (such as 6ms) is allowed to be vacated and provided to the terminal for its measurement. The time that should be vacated is called the gap time. During the gap time, the terminal neither uploads data to the base station , the base station does not send data to the terminal either.

Among them, the gap configuration information of LTE includes the following information elements: mode gap pattern, activation time startSFN, subframe number startSubframeNumber of gap activation, identification of gap deactivation,

Gap pattern (mode): There are currently two types: one is a gap with a period of 40ms and a gap of 6ms per cycle; the other is a gap with a cycle of 120ms and a gap of 6ms per cycle.

startSFN: Activation time, identified by SFN (System Frame Number, system frame number). Among them, the SFN is issued through the MIB (Main Information Block) of the cell system information, and the MIB will be issued in each data frame. Since the length of each data frame is 10ms, that is, each SFN represents 10ms. The SFN is represented by 10 bits, so the size of the SFN period is 1024×10ms (ie 10.24 seconds), that is, the value range of the SFN is 0-1023.

startSubframeNumber: The subframe number of the gap activation. Since a 10ms frame is divided into 10 subframes, that is, each subframe is 1ms, the subframe number of the gap activation identifies the specific start subframe position of a gap in startSFN.

deactivate, indicating that the gap is deactivated, that is, the base station requires the terminal to give up the configuration information of the gap obtained before.

After analysis, the inventor found that in the current handover process performed by the terminal, the terminal needs to perform gap-based measurement in at least two cases:

First, when the source cell is configured with gap-based measurement, and the handover command of the target cell does not carry measurement configuration information, for intra-frequency (for example, the terminal is handed over from the first cell under frequency 1 to the second cell under frequency 1 ), the terminal will continue the measurement of the source cell (including gap-based measurement);

Second, when the target cell sets gap-based measurement configuration information in the handover command, the terminal needs to perform measurement based on the gap-based measurement configuration information set by the target cell.

However, the inventors found that, referring to Fig. 1, due to the periodicity of SFN, when the SFN cycles around (period around means that after the SFN increases from 0 to 1023, it returns to 0, 1... until 1023, and so on), When the terminal analyzes the obtained startSFN, it will cause errors, resulting in inconsistent gap configurations used by the base station of the target cell and the terminal, causing confusion. For example, the terminal reads that the SFN of the target cell is 2, and the configured activation time startSFN=1022, At this time, the terminal can be regarded as 1022 in the last SFN cycle, that is, the gap measurement needs to be started now, or it can be considered as 1022 in the current cycle, that is, the gap measurement needs to be waited for a while.

If gap-based measurement is to be performed, the terminal needs to know the SFN of the target cell, but the prior art does not solve the problem of when the terminal reads the SFN of the target cell.

On the other hand, there is still a problem that gap-based measurement is difficult to be actually implemented in the prior art. On the other hand, in the prior art, during the terminal RA (Random Access, random access) process, the base station side of the target cell may not be able to identify the terminal. Therefore, there is still a problem of how to reactivate the gap.

Contents of the invention

Embodiments of the present invention provide a method, system and device for configuring measurement gaps. Described technical scheme is as follows:

A method of configuring a measurement gap, the method comprising:

The terminal acquires the time when the system frame number SFN of the target cell, the time used for switching, the gap activation time startSFN set by the target cell, and the effective configuration range of the startSFN;

According to the time of the system frame number SFN of the target cell and the time used for switching, calculate the time when the target cell receives the handover request;

Obtain the execution range of the startSFN according to the time when the target cell receives the handover request and the effective configuration range of the startSFN, where the execution range is used to perform gap-based measurement when the startSFN is within the execution range ;

Judging whether the acquired startSFN is within the execution range, if yes, performing gap-based measurement.

A method for configuring a measurement gap, the method comprising: when the set gap activation time startSFN is located before the time point when the terminal enters the target cell,

The terminal selects the next gap period and starts to perform gap-based measurement;

or,

A party between the terminal and the target cell notifies the other party to start gap-based measurement by sending a notification message.

A method of configuring a measurement gap, the method comprising:

Setting the final cut-off time for the terminal to obtain the system frame number SFN of the target cell, wherein the last cut-off time is later than the handover completion time;

Obtain the system frame number SFN of the target cell before the deadline.

A method of configuring a measurement gap, the method comprising:

A restart time point for performing gap-based measurement is set, and the restart time point satisfies conditions after the terminal obtains the system frame number SFN of the target cell, and after the terminal handover is completed.

A method of configuring a measurement gap, the method comprising:

The terminal obtains the system frame number SFN of the target cell;

sending a message to notify the target cell, so that the target cell performs gap-based measurement.

A method of configuring a measurement gap, the method comprising:

During the random access RA process of the terminal, when the gap-based measurement is interrupted, set the revalidation time for performing the gap-based measurement.

A method of configuring a measurement gap, the method comprising:

When the terminal judges that there is uplink signaling to be sent to the base station side of the target cell and random access needs to be performed at the same time, the terminal sets the priority of performing the random access RA process higher than the priority of performing the gap-based measurement process;

When the terminal judges that there is uplink data to be sent to the base station side of the target cell and the gap-based measurement process needs to be performed at the same time, the terminal sets the priority of performing the gap-based measurement process higher than the random access The priority of the RA process.

A system, characterized in that the system includes: a terminal and a base station, and the base station configures a target cell of the terminal;

The terminal is used to obtain the time of the system frame number SFN of the target cell, the time used for switching, the gap activation time startSFN set by the target cell, and the effective configuration range of the startSFN; according to the time of the system frame number SFN of the target cell, the time used for switching , calculating the time when the target cell receives the handover request; according to the time when the target cell receives the handover request and the effective configuration range of the startSFN, the execution range of the startSFN is obtained, wherein the execution range is used when the startSFN is in When within the execution range, perform gap-based measurement; determine whether the acquired startSFN is within the execution range, and if so, perform gap-based measurement;

The base station is configured to provide the terminal with the set gap activation time startSFN.

A device comprising:

The acquisition module is used for the terminal to obtain the time of the system frame number SFN of the target cell, the time used for switching, the gap activation time startSFN set by the target cell, and the effective configuration range of the startSFN; according to the time of the system frame number SFN of the target cell, the time used for switching Time, calculating the time when the target cell receives the handover request; according to the time when the target cell receives the handover request and the effective configuration range of the startSFN, the execution range of the startSFN is obtained, wherein the execution range is used when the startSFN when within said execution range, perform gap-based measurements;

A judging module, configured to judge whether the startSFN is within the execution range;

An executing module, configured to execute gap-based measurement when the judging result of the judging module is yes.

A device comprising:

The first processing module is used to select the next gap cycle and start performing gap-based measurement when the set gap activation time startSFN is located before the time point when the device enters the target cell;

The second processing module is configured to send a notification message to the target cell to notify the target cell to start performing gap-based measurement when the set gap activation time startSFN is before the time point when the device enters the target cell, or receive the Notification sent by the target cell to start gap-based measurement.

A device comprising:

SFN last cut-off time setting module, is used for setting the last cut-off time of obtaining the system frame number SFN of target cell; Said last cut-off time is later than handover completion time;

The SFN acquisition module is configured to acquire the system frame number SFN of the target cell before the final deadline set by the SFN final deadline setting module.

A device comprising:

The restart time point setting module is used to set the restart time point for performing gap-based measurement. The conditions met by the restart time point are specifically after the device obtains the system frame number SFN of the target cell, and after the device handover is completed.

A device comprising:

A notification module, configured to actively send a message to notify the target cell after the device obtains the system frame number SFN of the target cell, and the message is used to enable the target cell to perform gap-based measurement after receiving the message ;

The receiving module is configured to perform gap-based measurement after receiving the notification from the target cell.

A device comprising:

A revalidation time setting module, configured to set a revalidation time for performing gap-based measurement during the random access RA process of the device.

A device comprising:

The first execution module is configured to set the priority of performing the random access RA process higher than that of performing the gap-based measurement process when it is judged that there is uplink signaling to be sent to the base station side of the target cell and random access needs to be performed at the same time priority;

The second execution module is used to set the priority of performing the gap-based measurement process to be higher than that of performing the random access when it is judged that there is uplink data to be sent to the base station side of the target cell and the gap-based measurement process needs to be performed at the same time. Enter the priority of the RA process.

The beneficial effects of the technical solution provided by the embodiments of the present invention are:

By setting the effective configuration range for the activation time startSFN of the gap, setting the last deadline for the terminal to obtain the system frame number SFN of the target cell, setting the restart time point for performing gap-based measurement, and setting the revalidation time for performing gap-based measurement, etc. In this way, the terminal and the target cell are kept in step to perform the gap-based measurement to avoid confusion.

Description of drawings

FIG. 1 is a schematic diagram of the SFN periodic wrapping phenomenon provided by the prior art;

FIG. 2 is a schematic diagram of time points in a terminal switching process provided by Embodiment 1 of the present invention;

FIG. 3 is a schematic diagram of gap-based measurement when the configuration range of startSFN provided by Embodiment 1 of the present invention is half of the SFN cycle;

FIG. 4 is a schematic diagram of a system for configuring measurement gaps provided by Embodiment 5 of the present invention;

Fig. 5 is a schematic diagram of a device provided by Embodiment 8 of the present invention;

Fig. 6 is a schematic diagram of a device provided by Embodiment 9 of the present invention;

Fig. 7 is a schematic diagram of a device provided by Embodiment 10 of the present invention;

Fig. 8 is a schematic diagram of a device provided by Embodiment 11 of the present invention;

Fig. 9 is a schematic diagram of a device provided by Embodiment 13 of the present invention.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

Example 1

The embodiment of the present invention provides a method for configuring a measurement gap, by setting an effective configuration range for the activation time startSFN of the gap gap, thereby solving the problem of confusion due to inconsistent gap configurations used by the base station side of the target cell and the terminal, In particular, aiming at the phenomenon of SFN cycle wrapping in the prior art, the terminal's misunderstanding of the gap activation time startSFN is effectively overcome. The content of the method is as follows: the terminal obtains the gap activation time startSFN set by the target cell; obtains the target cell Calculate the time when the target cell receives the handover request from the time of the system frame number SFN and the time used for handover; obtain the execution range of startSFN according to the time when the target cell receives the handover request and the effective configuration range of startSFN, where the execution range is used when startSFN When it is within the execution range, perform gap-based measurement; judge whether the obtained startSFN is within the execution range, and if so, perform gap-based measurement. Wherein, the effective configuration range of startSFN is specifically: the effective configuration range of startSFN is smaller than the SFN period.

In order to describe the method provided by the embodiment of the present invention in detail, please refer to the following content:

Referring to FIG. 2 , an embodiment of the present invention provides a schematic diagram of time points in the process of terminal handover. The terminal is handed over from the source cell to the target cell. Several key times of the handover process are as follows:

B1: The target cell receives the handover request sent by the source cell, and the handover request carries the measurement configuration information set by the source cell for the terminal;

B2: The target cell returns a handover request response to the source cell;

Wherein, when the target cell needs to set measurement configuration information for the terminal, the response may carry the measurement configuration information set by the target cell for the terminal; when the target cell does not need to set measurement configuration information for the terminal, for example, the frequency In case of handover (for example, the terminal switches from the first cell under frequency 1 to the second cell under frequency 1), the terminal will continue the measurement of the source cell (including measurement based on gap), at this time, the target cell does not need to be The terminal sets measurement configuration information, that is, does not carry the measurement configuration information set by the target cell for the terminal;

In the embodiment of the present invention, the measurement configuration information set by the target cell for the terminal is carried in the handover request response as an example.

A1: The terminal receives a handover command from the source cell;

Wherein, regarding whether the above-mentioned source cell obtains the measurement configuration information set by the target cell for the terminal through the handover request response, correspondingly, the handover command may specifically carry the measurement configuration information set by the target cell for the terminal, or not carry the target The measurement configuration information set by the cell for the terminal.

Since this embodiment takes the measurement configuration information set by the target cell for the terminal in the handover request response as an example, the handover command will carry the measurement configuration information set by the target cell for the terminal;

A2: Perform DL (Down Link, downlink) synchronization.

The purpose of this step is to perform time synchronization between the source cell and the target cell, that is, to solve the problem of the time difference between the target cell and the source cell by performing DL synchronization.

B3: The terminal sends a preamble request to the target cell through the Msg1 message;

Among them, those skilled in the art can know that the base station can know that a terminal initiates an access request according to the preamble signal, and the preamble signal can be divided into: a dedicated preamble signal and a non-proprietary preamble signal:

When the base station receives the dedicated preamble signal, it can know which terminal initiated the access request, that is, the dedicated preamble signal can indicate the identity of the terminal;

After the base station receives the non-proprietary preamble signal, it needs to perform multiple interactions with the terminal before determining which terminal specifically initiates the access request.

A3: The target cell returns a preamble response to the terminal through the Msg2 message;

Wherein, if B3 receives a proprietary leading preamble request, then the terminal receives the leading preamble response A3 moment, it is considered as the moment when the terminal handover is successful; then execute step A4;

A4: The terminal sends a handover completion message to the target cell through the Msg3 message;

A5: The target cell returns a response ACK to the terminal through the automatic repeat request HARQ (Hybrid Automatic Repeat Request) of the Msg3 message;

A6: The target cell sends the physical downlink control channel PDCCH (Physical Downlink Control Channel) information to the terminal through the Msg4 message,

B4: The target cell executes the contention resolution of the terminal through the Msg4 message;

Wherein, the messages carried at time A6 and B4 are different messages that may be in the same subframe, that is, they may be carried in the same subframe.

B5: The target cell receives the response ACK of the automatic repeat request HARQ (Hybrid Automatic Repeat Request) sent by the terminal through the Msg4 message;

A7: The terminal receives the RLC (Radio Link Control) status information sent by the target cell.

All the time points as shown in Figure 2 can be used as the starting moment of the effective configuration range of the gap activation time startSFN involved in the embodiment of the present invention, wherein the size of the effective configuration range needs to be set to be less than the SFN cycle (10240ms), That is, based on the starting moment of the calculation of the gap activation time startSFN, the range of the SFN serial number increasing backwards is less than 1024 times (ie Δ<1024), so as to avoid the misunderstanding of the gap activation time startSFN by the terminal caused by the SFN cycle wrapping phenomenon.

See example:

Referring to Fig. 3, it is assumed that the starting time is B1 (the moment when the target cell receives the handover request message), and the SFN of the target cell is 1020, and the effective configuration range size of the gap activation time startSFN set in this embodiment is half of the SFN period ( That is, 5120 ms) as an example, the effective configuration range of the target cell for the gap activation time startSFN may be: 1020-1023 in the previous SFN period plus 0-508 in the next period.

First of all, when the terminal receives a handover command when SFN=1 in the target cell, and SFN=4 accesses the target cell, the terminal can read the actual time of the target cell SFN (assuming that the time is SFN=4), and The time spent switching (usually, it takes 30ms for the terminal to perform switching, since 1 frame=10ms, that is, the terminal needs 3 frames for switching), obtain the moment when the above-mentioned switching command is received (that is, it is calculated that the moment is SFN=1), Then calculate the time when the target cell receives the handover request, the calculation process is as follows:

Since the general handover preparation stage does not exceed 50ms (that is, 5 frames), the terminal can know that the time when the target cell receives the handover request is around SFN=1020.

Among them, after the target cell receives the handover request, it will set the gap activation time startSFN for the terminal within a preset time (usually no more than 50ms, that is, 5 frames). In this embodiment, the target cell is the gap activation time set by the terminal. The startSFN is SFN=1022 as an example, that is, after the target cell receives the handover request at the time of SFN=1020, the gap activation time startSFN is set for the terminal after 2 preset frames (that is, at the time of SFN=1022).

Then, according to the size of the effective configuration range of the gap activation time startSFN set by the target cell and the moment when the target cell receives the handover request, the terminal calculates a reasonable range (ie, the execution range) of the gap activation time startSFN set by the target cell (i.e., the execution range For performing gap-based measurement when said startSFN is within said execution range);

Wherein, the terminal obtains the effective configuration range size of the gap activation time startSFN set by the target cell in the following manner:

First, according to the configuration of the system, the effective configuration range of the gap activation time startSFN set by the target cell is set in advance in the terminal, so that the terminal can obtain the effective configuration range of the gap activation time startSFN set by the target cell;

Second, through the message sent by the target cell, the terminal obtains the purpose of the effective configuration range size of the gap activation time startSFN set by the target cell, for example, by using the message carrying the gap activation time startSFN information set by the target cell for the terminal, Send the information of the effective configuration range of the gap activation time startSFN set by the target cell for the terminal together. In addition, the target cell can also send the gap activation time startSFN set by the target cell by adding a new message. Valid configuration range size information.

Therefore, based on the effective configuration range of the gap activation time startSFN set by the target cell and the moment when the target cell receives the handover request, the terminal calculates the reasonable range of the gap activation time startSFN set by the target cell, as follows:

As mentioned above, the effective configuration range of the gap activation time startSFN set by the target cell in this embodiment is 512 frames, the time when the target cell receives the handover request is 1020 frames, and the gap activation time startSFN is 1022 frames, it can be known The reasonable range of the gap activation time startSFN for this setting is specifically SFN=1020-1023 of the previous SFN cycle plus SFN=0-508 of the next SFN cycle.

Furthermore, in order to prevent the reduction of the calculation accuracy due to frame loss and other situations, the embodiment of the present invention also proposes a method of adding redundant frames, wherein the redundant frames can usually be set to 10 frames before and after. In the way of redundant frames, the above SFN=1020 adds 10 redundant frames forward, similarly, after SFN=508 adds 10 redundant frames backward; the reasonable range of the obtained set gap activation time startSFN is: before SFN=1010-1023 of one SFN cycle plus SFN=0-518 of the next SFN cycle. The embodiment of the present invention does not limit the number of specific values for setting redundant frames. This embodiment takes 10 frames as an example, and may also be 5 frames, etc., and set it according to the specific needs of the system.

After the terminal passes through the above calculation process, it can know that the gap activation time startSFN (SFN=1022) set by the target cell is SFN=1022 in the previous SFN cycle, because the current cycle range of SFN is 0-518, and the range of 0-518 does not include the time of SFN=1022, so the terminal will not misunderstand whether the gap activation time startSFN set by the target cell is the value time of the current cycle of SFN or the value time of the previous cycle of SFN, thus solving the problem of Because the base station side of the target cell and the gap configuration used by the terminal are inconsistent, confusion occurs.

Further, when the terminal finds that the obtained gap activation time startSFN set by the target cell is not within the reasonable range of the calculated gap activation time startSFN, the terminal may refuse to perform gap configuration, and may also send a notification message to the target cell, the notification message It is used to inform the target cell that the gap activation time startSFN set is not within the reasonable range set by itself.

Wherein, when the gap activation time startSFN is before the time point when the terminal enters the target cell (that is, the time when the handover is completed), that is, the gap activation time startSFN is in the handover process of the terminal, the terminal can choose to start executing the gap-based measurement; wherein, one party between the terminal and the target cell may also send a notification message to notify the other party to start performing gap-based measurement. Taking the terminal notifying the target cell as an example, for example, the terminal notifies the target cell to start gap-based measurement by sending a notification message to the target cell, wherein the notification message can be implemented by using a handover complete message, Msg2 or an ACK message to Msg4 .

In addition, those skilled in the art can know that when the gap activation time startSFN is located after the terminal enters the target cell or after the terminal handover is completed, the terminal only needs to wait until the time point (that is, the gap activation time startSFN) to start executing the gap-based Measurement.

To sum up, the method for configuring and measuring the gap provided by the embodiment of the present invention effectively overcomes the terminal's misunderstanding of the activation time startSFN of the gap when the SFN period wrapping phenomenon occurs in the prior art, and through the activation time of the gap startSFN sets the effective configuration range, which solves the problem of confusion due to the inconsistency of the gap configuration used by the base station side of the target cell and the terminal.

Example 2

The embodiment of the present invention provides a method for configuring a measurement gap. Before the terminal performs gap-based measurement in the target cell, it needs to know the current SFN of the target cell, so as to achieve the purpose of synchronizing the startSFN of the gap-based activation time between the terminal and the target cell. Otherwise, the terminal cannot determine in which frame the gap is located according to the acquired activation time startSFN of the gap.

If the terminal wants to perform gap-based measurement during (or after) handover, it needs to specify the time point when the terminal finally obtains the SFN of the target cell, that is, the terminal can obtain the SFN of the target cell in advance for the last time point, but cannot Finally click to obtain the SFN of the target cell. In order to achieve the goal that the target cell and the terminal can maintain a unified action, wherein,

Set the final cut-off time for the terminal to obtain the system frame number SFN of the target cell, wherein the last cut-off time is later than the handover completion time; obtain the system frame number SFN of the target cell before the last cut-off time.

Wherein, the specific method for the terminal to read the SFN of the target cell can refer to the provisions in the agreement, or can be determined by the terminal itself. The embodiment of the present invention does not limit the specific method for the terminal to read the SFN of the target cell.

Referring to FIG. 2 , preferably, the last deadline for the terminal to obtain the SFN of the target cell can be set to the moment when the terminal handover is completed (for example, for the dedicated preamble, the moment when the terminal completes the handover is A3; for the non-proprietary For the preamble, the moment when the terminal completes the handover is A6). When the terminal obtains the SFN of the target cell as defined above, the terminal and the target cell have confirmed each other, so the gap configuration set by the target cell for the terminal can start to take effect.

Wherein, the last cut-off time point for the terminal to obtain the SFN of the target cell can also be a certain time after the time when the handover of the terminal is completed according to the setting requirements of the system, after a certain period of time. wait. In particular, it should be noted that immediately after the completion of the handover of the above-mentioned terminal (that is, the handover success identification point A3 or A6), there are still some operational procedures that must be executed immediately, and the operational procedures cannot be executed immediately based on the gap The impact of measurement, that is, the above-mentioned operational process steps that must usually be performed have a higher priority than performing gap-based measurement operations.

For example, at the handover success identification point A3 of the dedicated leader, it is usually necessary to execute the handover completion message (A4, A5) immediately; at the handover success identification point A6 of the non-proprietary leader, it is usually necessary to immediately execute the Msg4 (B4, B5) , and neither A4, A5, nor B4, B5 above should be delayed by performing gap-based measurements.

To sum up, the final cut-off time point for the terminal to obtain the SFN of the target cell provided by the embodiment of the present invention can be each time point in Figure 2, such as A2: when synchronizing; or set as : For the proprietary preamble, the last cut-off time point for obtaining the SFN of the target cell can be any time of A3, A4, and A5; for the non-proprietary preamble, the last cut-off time point for obtaining the SFN of the target cell can be A5 , A6, B5 at any time.

Alternatively, set the final deadline for obtaining the SFN of the target cell to be: after the terminal completes the handover, one or at most 4 cycles of reading the SFN of the target cell will pass, see Figure 2, specifically: for For handover, it is one or at most 4 cycles of reading the SFN of the target cell after A5; for the handover based on the non-proprietary preamble, it is one or at most 4 cycles of reading the SFN of the target cell after B5, one read The period of the SFN of the target cell is specifically 10 milliseconds.

Regarding how the terminal acquires the SFN of the target cell when acquiring the SFN of the target cell, that is, how the terminal acquires the SFN of the target cell, the embodiment of the present invention provides two acquisition methods, see the following:

Method 1. The terminal can calculate and obtain the current SFN (and subframe subframe) of the target cell based on the SFN of the source cell, the deviation value of the SFN of the source cell and the target cell (and the deviation value of the subframe of the SFN of the source cell and the target cell). Number). Wherein, the above deviation value may be provided to the terminal by using a switching command.

For example, the source cell sends the above-mentioned deviation value X of the SFN of the source cell and the target cell to the terminal through a handover command, and the SFN of the source cell obtained by the terminal is specifically Z, then the terminal can use the above deviation value X and the SFN value Z of the source cell , it can be learned that the SFN value of the target cell is X+Z.

Method 2: The terminal can directly read the MIB of the cell system information according to the cell system information issued by the target cell. Since the SFN is delivered through the MIB, the terminal can obtain the SFN according to the read MIB.

To sum up, the method for configuring gap measurement provided by the embodiment of the present invention ensures that the terminal knows the current state of the target cell before the target cell performs gap-based measurement by setting the last cut-off time point for the terminal to obtain the SFN of the target cell. SFN, so as to achieve the purpose of synchronization between the terminal and the target cell for the gap-based activation time startSFN, and ensure the accuracy of gap-based measurement.

Example 3

The embodiment of the present invention provides a method for configuring a measurement gap. After the terminal obtains the current SFN of the target cell, it needs to set the gap activation time startSFN of the terminal.

Wherein, due to the gap set by the source cell during the handover process (corresponding to when the target cell does not set the gap information for the terminal, the terminal continues to use the gap information set by the source cell) and the gap set by the target cell, when the time of the above settings is compared When it is early (before the switch is completed), the following problems will exist:

First of all, the execution priority of the handover process is generally higher than that of the gap-based measurement, because if the terminal prioritizes the gap-based measurement, the handover may not be completed in time, and the handover time cannot be accurately predicted , especially in the contention-based random access RA process, the required handover time may be very long (for example, a cycle greater than one gap), so it is difficult to actually perform gap-based measurement actions.

Secondly, even if the terminal can choose to perform gap-based measurement preferentially, if the target cell has not confirmed the terminal, that is, the handover of the terminal has not been completed, it cannot prepare to schedule resources for the terminal. At this time, the terminal performed The gap-based measurement can only be regarded as a unilateral operation, and also requires a time point, so that the target cell (ie, the base station side of the target cell) can also accurately start performing the configuration of the gap-based measurement.

In addition, since it takes time for the terminal to read the SFN of the target cell, and each data frame (1 frame = 10ms) has only one chance to obtain the SFN, if the terminal may not be able to obtain the SFN due to signal delay, loss, etc. Try to acquire again in the next 10ms, therefore, the gap-based measurement will be interrupted.

Due to the above reasons, it will lead to the problem that the gap-based measurement is difficult to be actually implemented. Therefore, it is necessary to set the restart time point after the gap is interrupted and suspended, and the restart time point of the setting should meet the following conditions:

Condition 1: after the actual time point when the terminal acquires the SFN of the target cell;

Wherein, the actual time point refers to the moment when the terminal actually obtains the SFN of the target cell, and only after the terminal obtains the SFN of the target cell, the terminal may start to perform gap-based measurement operations;

Condition 2: After the terminal switching is completed;

Wherein, only after the handover of the terminal is completed, the target cell can know that the UE has accessed, that is, confirm the terminal.

Condition 3: If the target cell has set gap information, it must be satisfied after the time when the gap is set in the target cell;

To sum up, the embodiment of the present invention introduces the gap restart time point (or called the revalidation point), and puts forward conditional requirements for the gap restart time point, see Figure 2, this embodiment assumes that the gap activation time startSFN set by the target cell is earlier , assuming earlier than A3: where,

1. For the handover based on the proprietary preamble, the above-mentioned gap restart time point can choose A3, A4 or A5; or, after A5, there will be one or at most 4 cycles for reading the SFN of the target cell;

2. For the switching of non-proprietary leading preamble, the above-mentioned gap restart time point can be selected from A6, B4 or B5, or one or at most 4 cycles after B5 to read the SFN of the target cell. Among them, those skilled in the art can It is known that a period for reading the SFN of the target cell is specifically 10 milliseconds.

Furthermore, the defect that it is difficult to actually implement gap-based measurement actions can also be avoided by the following method, which is as follows:

After the terminal obtains the SFN of the target cell, it sends a notification message to actively notify the target cell (for example, through measurement reporting), so that the target cell and the terminal can confirm. Correspondingly, it is stipulated that only the above-mentioned notification can be received for gap-based measurement The message is then executed.

The method for configuring the measurement gap provided by the embodiment of the present invention avoids the problem that it is difficult to perform gap-based measurement in practice by setting the restart time point after the gap is interrupted and suspended, and effectively solves the gap-based measurement. implement.

Example 4

The embodiment of the present invention provides a method for configuring measurement gaps. During the random access RA process caused by DL/UL (UpLink uplink) data transmission, there will be interruptions based on gap measurement. Set the effective point, the specific content is as follows:

For the proprietary preamble, in the random access RA process, the gap revalidation point can be defined as after receiving Msg2, see Figure 2, that is, after the time A3; or, after A3, one or at most 4 Read the period of the SFN of the target cell;

For the non-proprietary leading preamble, in the process of random access to RA, the gap revalidation point can be defined as after receiving the response Ack of Msg3, see Figure 2, that is, after time A5; or random access to RA After the competition process is over, see Figure 2, that is, after time B4, or after time B5, or,

Or, after B5, one or at most 4 periods of reading the SFN of the target cell is the revalidation time for performing gap-based measurement, wherein one period of reading the SFN of the target cell is specifically 10 milliseconds.

To sum up, the method for configuring the measurement gap provided by the embodiment of the present invention is mainly aimed at defining and setting the time point when the gap takes effect again in other random access RA processes (such as caused by DL/UL data transmission), so as to ensure The gap-based measurement can continue to be performed without error.

Example 5

An embodiment of the present invention provides a method for configuring a measurement gap, wherein the content of the method is as follows:

When the terminal has uplink signaling to be sent to the base station side of the target cell, the terminal should perform the random access RA process first, that is, perform the random access RA process first, and then perform the gap-based measurement process, that is, the terminal sets the execution The priority of random access RA procedure is higher than that of performing gap-based measurement procedure.

When the terminal has uplink data to be sent to the base station side of the target cell, the terminal should first perform the gap-based measurement process, that is, first perform the gap-based measurement process, and then perform the random access RA process, that is, the terminal is set to perform the gap-based measurement process. The priority of the measurement process is higher than that of performing the random access RA process.

It should be noted that those skilled in the art can know that since the signaling carried by SRB2-Signling Radio Bearer 2 has a lower priority, the signaling carried by the SRB2-Signling Radio Bearer 2 When transmitting, it can be processed in the same low-priority manner as the data: the terminal performs the gap-based measurement process first, that is, the gap-based measurement process is performed first, and then the random access RA process is performed, that is, the terminal is set to perform the gap-based measurement process. The priority of the measurement process is higher than that of performing the random access RA process.

However, on the base station side of the target cell, it is necessary to always maintain the priority of the random access RA process. Even during the gap-based measurement period, it must be prepared to accept the message that the terminal may upload, that is, the base station side of the target cell is performing a gap-based measurement. During the measurement period, when a message uploaded by a terminal is received, and the message is used to perform a random access RA process of the terminal, the base station side of the above-mentioned target cell needs to preferentially perform the random access RA process of the terminal.

The method for configuring the measurement gap provided by the embodiment of the present invention effectively avoids the conflict between the random access RA process performed by the terminal and the gap-based measurement.

Example 6

An embodiment of the present invention provides a method for configuring measurement gaps, wherein the content of the method is as follows: whether the terminal uses a dedicated preamble to perform a random access RA process is separately explained:

When the terminal uses the proprietary preamble to perform the random access RA process, the terminal should actively avoid conflicts with gap-based measurement by setting a certain period of time during the process of performing gap-based measurement before performing random access. The way of entering the RA process, so as to effectively realize that the terminal can avoid the conflict between the initiated random access RA process and the gap-based measurement. For example, within the first 10 ms of performing gap-based measurement, avoid initiating the RA process, that is, when the terminal uses a dedicated preamble for random access RA process, when the terminal performs gap-based measurement for the first 10 ms, then consider initiating The above random access RA process.

When the terminal uses a non-proprietary preamble to perform random access RA process, the terminal can choose a strategy to avoid conflicts between the random access RA process and the process of performing gap-based measurement, that is, when a certain gap-based measurement ends Initiate the random access RA process within the preset time period after the gap measurement. For example, try to initiate the above random access RA process within 0-18ms after the end of a gap measurement. It conflicts with the time of performing gap-based measurement; furthermore, the terminal can also choose the strategy of giving priority to the random access RA process, that is, the random access RA process of the terminal is preferentially executed, and when the random access RA process is completed, the Start the gap-based measurement process.

The above describes whether the terminal side uses the dedicated preamble to perform the random access RA process. However, on the base station side of the target cell, no matter whether the terminal uses the dedicated preamble to perform the random access RA process or uses the non-proprietary preamble The preamble performs a random access RA process. The base station side always gives priority to the random access RA process of the terminal, and is ready to accept the upload message from the terminal even during the gap-based measurement period.

The method for configuring the measurement gap provided by the embodiment of the present invention effectively avoids the conflict between the random access RA process performed by the terminal and the gap-based measurement.

Example 7

Referring to FIG. 4, an embodiment of the present invention provides a system, the system includes: a terminal and a base station, and the base station configures the target cell of the terminal;

The terminal is used to obtain the time of the system frame number SFN of the target cell, the time used for handover, the gap activation time startSFN set by the target cell, and the effective configuration range of startSFN; calculate the target cell according to the time of the system frame number SFN of the target cell and the time used for handover The time when the handover request is received; according to the time when the target cell receives the handover request and the effective configuration range of startSFN, the execution range of startSFN is obtained, wherein the execution range is used to perform gap-based measurement when startSFN is within the execution range; determine the acquired Whether startSFN is within execution range, if so, perform gap-based measurement;

The base station is configured to provide the terminal with the set gap activation time startSFN.

Wherein, the terminal is further configured to obtain the execution range of startSFN according to the time when the target cell receives the handover request, the effective configuration range of startSFN and the set redundant frames.

Wherein, the terminal is further used for refusing to perform gap-based measurement when judging that the startSFN is not within a reasonable range, or sending a notification message to the target cell to notify the target cell to start performing gap-based measurement.

Wherein, the terminal is also used to set the final cut-off time for obtaining the system frame number SFN of the target cell, and the last cut-off time is later than the handover completion time; the system frame number SFN of the target cell is obtained before the last cut-off time.

Wherein, the terminal is also used to set the restart time point for performing gap-based measurement. The restart time point meets the conditions after the terminal obtains the system frame number SFN of the target cell, and after the terminal handover is completed.

Wherein, the terminal is also used to actively send a message to notify the target cell after the terminal obtains the system frame number SFN of the target cell;

Correspondingly,

The above base station is also configured to perform gap-based measurement after receiving the message.

Wherein, the terminal is also used to set the revalidation time for performing gap-based measurement during the random access RA process of the terminal;

When the random access RA process is a dedicated preamble random access RA process, set the revalidation time for performing gap-based measurement after the terminal receives Msg2;

When the random access RA process is a non-exclusive preamble random access RA process, set the revalidation time for performing gap-based measurement after the terminal receives the response ACK of Msg3, or after the random access contention process ends.

The system provided by the embodiment of the present invention effectively overcomes the terminal's misunderstanding of the gap activation time startSFN by addressing the SFN cycle wrapping phenomenon that occurs in the prior art, and by setting the effective configuration range for the gap activation time startSFN, etc., Solve the problem of confusion due to the inconsistency of the gap configuration used by the base station side of the target cell and the terminal.

Example 8

Referring to Figure 5, an embodiment of the present invention provides a device, which includes:

The acquisition module is used for the terminal to obtain the time of the system frame number SFN of the target cell, the time used for switching, the gap activation time startSFN set by the target cell, and the effective configuration range of startSFN; according to the time of the system frame number SFN of the target cell, the time used for switching, Calculate the moment when the target cell receives the handover request; obtain the execution range of startSFN according to the time when the target cell receives the handover request and the effective configuration range of startSFN, wherein the execution range is used to perform gap-based measurement when startSFN is within the execution range;

Judgment module, used to judge whether startSFN is within the scope of execution;

The executing module is configured to execute gap-based measurement when the judging result of the judging module is yes.

Among them, the acquisition module includes:

a setting unit for setting redundant frames;

Correspondingly, the obtaining module is also used to obtain the execution range of startSFN according to the time when the target cell receives the handover request, the effective configuration range of startSFN and the set redundant frames.

Among them, the equipment also includes:

The processing module is configured to, when the judging result of the judging module is that the startSFN is not within the execution range, or, send a notification message to the target cell to notify the target cell to start performing gap-based measurement.

The device provided by the embodiment of the present invention effectively overcomes the terminal's misunderstanding of the activation time startSFN of the gap by addressing the SFN cycle wrapping phenomenon that occurs in the prior art, and solves the problem of inconsistent gap configurations used by the base station side of the target cell and the terminal , and confusion occurs.

Example 9

Referring to Figure 6, an embodiment of the present invention provides a device, which includes:

The first processing module is used to select the next gap cycle and start performing gap-based measurement when the set gap activation time startSFN is located before the time point when the device enters the target cell;

The second processing module is configured to send a notification message to the target cell when the set gap activation time startSFN is before the time point when the device enters the target cell, to notify the target cell to start performing gap-based measurement, or to receive a notification sent by the target cell, Start performing gap-based measurements.

The device provided by the embodiment of the present invention solves the problem of confusion caused by inconsistent gap configurations used by the base station side of the target cell and the terminal.

Example 10

Referring to Figure 7, an embodiment of the present invention provides a device, which includes:

The last cut-off time setting module of SFN is used to set the last cut-off time for obtaining the system frame number SFN of the target cell; the last cut-off time is later than the handover completion time;

The SFN obtaining module is used to obtain the system frame number SFN of the target cell before the final deadline set by the SFN final deadline setting module.

Among them, the SFN final deadline setting module specifically includes:

The first setting unit is used to set the moment when the device performs synchronization as the last cut-off time;

The second setting unit is used to set the time when the device receives the dedicated preamble response sent by the target cell for the handover based on the dedicated preamble, or the time when the device receives the handover completion message, or the device receives an automatic retransmission request The time when HARQ responds to ACK is the final cut-off time;

The third setting unit is used to set the time when the device receives the automatic repeat request HARQ response ACK for the handover based on the non-proprietary preamble, or the time when the device receives the physical downlink control channel PDCCH information, or the device sends an automatic The time when the retransmission request HARQ responds to ACK is the final deadline;

The fourth setting unit is used for handover based on the proprietary preamble, and the final cut-off time is one or at most 4 periods of reading the SFN of the target cell after the moment when the device receives the automatic repeat request HARQ response ACK; For the switching of the proprietary preamble, the final cut-off time is one or at most 4 cycles of reading the SFN of the target cell after the time when the device sends the automatic repeat request HARQ response ACK.

Wherein, the above-mentioned period for reading the SFN of the target cell is specifically 10 milliseconds.

The device provided by the embodiment of the present invention solves the problem of confusion due to inconsistent gap configurations used by the base station side of the target cell and the terminal by setting the last cut-off time for obtaining the system frame number SFN of the target cell.

Example 11

Referring to Figure 8, an embodiment of the present invention provides a device, which includes:

The restart time point setting module is used to set the restart time point for performing gap-based measurement. The restart time point meets the conditions after the device obtains the system frame number SFN of the target cell, and after the device handover is completed.

Among them, the restart time point setting module is also used to

Set the restart time point for performing gap-based measurement. The restart time point meets the conditions after the device obtains the system frame number SFN of the target cell, and after the device handover is completed, and after the gap time set by the target cell.

Among them, the restart time point setting module specifically includes:

The first setting unit is used to set the time when the device receives a dedicated preamble response sent by the target cell, or the time when the device receives a handover completion message, or the device receives an automatic retransmission request for handover based on a dedicated preamble The time when the HARQ responds to the ACK, or, after the time when the device receives the automatic repeat request and the HARQ responds to the ACK, one or at most 4 cycles of reading the SFN of the target cell is the restart time point;

The second setting unit is used to set the time when the device receives the physical downlink control channel PDCCH information for the handover based on the non-proprietary preamble, or the time when the device receives the contention resolution issued by the target cell, or the device sends The time when the automatic repeat request HARQ responds to the ACK, or one or at most 4 periods after the time when the device sends the automatic repeat request HARQ response to the ACK is the restart time point.

The device provided by the embodiment of the present invention solves the problem of confusion due to inconsistent gap configurations used by the base station side of the target cell and the terminal by setting the restart time point for performing gap-based measurement.

Example 12

An embodiment of the present invention provides a device, which includes:

The notification module is configured to actively send a message to notify the target cell after the device obtains the system frame number SFN of the target cell, and the message is used to enable the target cell to perform gap-based measurement after receiving the message;

The receiving module is configured to perform gap-based measurement after receiving the notification from the target cell.

The device provided by the embodiment of the present invention solves the problem of confusion caused by inconsistent gap configurations used by the base station side of the target cell and the terminal by actively sending the notification message.

Example 13

Referring to FIG. 9, an embodiment of the present invention provides a device, which includes:

The revalidation time setting module is used to set the revalidation time for performing gap-based measurement during the random access RA process of the device.

Among them, the revalidation time setting module specifically includes:

The first revalidation time setting unit is used to set the moment when the device receives the Msg2 dedicated preamble response sent by the target cell when the random access RA process is a dedicated preamble random access RA process, or after the device receives After the time of the Msg2 dedicated preamble response sent by the target cell, one or at most 4 cycles of reading the SFN of the target cell is the revalidation time for performing gap-based measurement;

The second revalidation time setting unit is used to set the time when the device receives the Msg3 automatic repeat request HARQ response ACK when the random access RA process is a non-exclusive preamble random access RA process, or random access contention After the time B4 of the process ends or the time when the device sends an automatic repeat request HARQ response ACK, or after the time when the device sends an automatic repeat request HARQ response ACK, one or at most 4 cycles of reading the target cell SFN are executed Revalidation time for gap-based measurements.

The device provided by the embodiment of the present invention solves the problem of confusion due to inconsistent gap configurations used by the base station side of the target cell and the terminal by setting the revalidation time for performing gap-based measurement.

Example 14

An embodiment of the present invention provides a device, which includes:

The first execution module is configured to set the priority of executing the random access RA process higher than that of executing the gap-based measurement process when it is judged that there is uplink signaling to be sent to the base station side of the target cell and random access needs to be performed at the same time. priority;

The second execution module is used to set the priority of performing the gap-based measurement process higher than the random access RA when it is judged that there is uplink data to be sent to the base station side of the target cell and the gap-based measurement process needs to be performed at the same time. Process priority.

Among them, the equipment also includes:

The third execution module is configured to set the priority of the gap-based measurement process higher than the priority of the random access RA process when performing the signaling based on the signaling radio bearer 2 SRB2 bearer.

Further, the equipment also includes:

The first selection module is configured to perform the random access RA process after a certain period of time after performing the process based on the gap measurement when it is judged that the random access RA process based on the dedicated preamble is used, so as to avoid and Conflicts of gap-based measurements;

The second selection module is configured to initiate random access based on the non-proprietary preamble within a preset period of time after the gap-based measurement ends when it is determined that the random access RA process based on the non-proprietary preamble is used. Into the RA process, or, the device chooses to preferentially execute the random access RA process based on the non-exclusive preamble to avoid conflicts.

The device provided by the embodiment of the present invention effectively avoids the conflict between the random access RA process performed by the terminal and the gap-based measurement.

To sum up, in the technical solution provided by the embodiment of the present invention, by setting the effective configuration range for the activation time startSFN of the gap, setting the last cut-off time for the terminal to obtain the system frame number SFN of the target cell, and setting the restart of the measurement based on the gap Time points, setting the re-effective time of gap-based measurement, etc., realize that the terminal and the target cell keep in step with the execution of gap-based measurement, and avoid confusion.

The word "receive" in the embodiments of the present invention can be understood as actively obtaining information from other modules or receiving information sent by other modules.

Those skilled in the art can understand that the drawing is only a schematic diagram of a preferred embodiment, and the modules or processes in the drawing are not necessarily necessary for implementing the present invention.

Those skilled in the art can understand that the modules in the device in the embodiment can be distributed in the device in the embodiment according to the description in the embodiment, and can also be changed and located in one or more devices different from the embodiment. The modules in the above embodiments can be combined into one module, and can also be further split into multiple sub-modules.

The serial numbers of the above embodiments of the present invention are for description only, and do not represent the advantages and disadvantages of the embodiments.

Part of the steps in the embodiments of the present invention can be realized by software, and the corresponding software program can be stored in a readable storage medium, such as an optical disk or a hard disk.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection of the present invention. within range.

Claims (42)

1. A method of configuring a measurement gap, the method comprising;

the terminal acquires the time of a system frame number SFN of a target cell, the time for switching, a gap activation time startSFN set by the target cell and an effective configuration range of the startSFN;

calculating the moment of receiving a switching request by a target cell according to the moment of a System Frame Number (SFN) of the target cell and the time used for switching;

acquiring an execution range of the startSFN according to the time when the target cell receives the switching request and the effective configuration range of the startSFN, wherein the execution range is used for executing measurement based on gap when the startSFN is in the execution range;

and judging whether the acquired startSFN is in the execution range, and if so, executing measurement based on gap.

2. The method of claim 1, wherein the valid configuration range of the startSFN is specifically:

the effective configuration range of the startSFN is less than the SFN period.

3. The method of claim 1, wherein before the step of obtaining the execution range of the startSFN according to the time when the target cell receives the handover request and the valid configuration range of the startSFN, the method further comprises:

setting a redundant frame;

correspondingly, the step of obtaining the execution range of the startSFN according to the time when the target cell receives the handover request and the effective configuration range of the startSFN specifically includes:

and acquiring the execution range of the startSFN according to the time when the target cell receives the switching request, the effective configuration range of the startSFN and the set redundant frame.

4. The method of claim 1, wherein the method further comprises:

and when the startSFN is judged not to be in the execution range, refusing to execute the measurement based on the gap, or sending a notification message to the target cell to notify the target cell to start executing the measurement based on the gap.

5. A method of configuring a measurement gap, the method comprising: when the set gap activation time startSFN is before the time point when the terminal enters the target cell,

the terminal selects the next gap period and starts to execute the measurement based on the gap;

or,

one party between the terminal and the target cell notifies the other party to start performing the gap-based measurement by sending a notification message.

6. The method according to claim 5, wherein the notification message is specifically:

a switch complete message or a response ACK message of Msg2 or Msg 4.

7. A method of configuring a measurement gap, the method comprising:

setting a terminal to acquire the last arrival time of a System Frame Number (SFN) of a target cell, wherein the last arrival time is later than the switching completion time;

and acquiring a System Frame Number (SFN) of the target cell before the last arrival time.

8. The method of claim 7, wherein the last arrival time is specifically:

the time when the terminal executes synchronization;

or,

for the switching based on the special preamble, the last-arrival time is the time when the terminal receives the special preamble response sent by the target cell, or the time when the terminal receives the switching completion message, or the time when the terminal receives the automatic repeat request HARQ response ACK;

or,

for the switching based on the non-proprietary preamble, the last-arrival time is the time when the terminal receives the automatic repeat request HARQ response ACK, or the time when the terminal receives the physical downlink control channel PDCCH information, or the time when the terminal sends the automatic repeat request HARQ response ACK;

or,

for the switching based on the special preamble, reading the target cell SFN period for one or at most 4 times after the terminal receives the time of the automatic retransmission request HARQ response ACK; for the switching based on the non-proprietary preamble, the period of reading the target cell SFN is one or at most 4 after the time when the terminal sends the automatic repeat request HARQ response ACK.

9. The method of claim 7, wherein the method further comprises: the step of obtaining the system frame number SFN of the target cell specifically includes:

the terminal acquires a system frame number SFN of a target cell according to the system frame number SFN of a source cell and the difference value of the system frame number SFN of the source cell and the target cell;

or,

the terminal acquires a system frame number SFN of a target cell and subframe information according to the system frame number SFN of a source cell, the subframe information, the difference value of the system frame number SFN of the source cell and the target cell and the difference value of subframes;

or,

and the terminal reads a master information block MIB of the target cell according to cell system information issued by the target cell and then acquires a system frame number SFN of the target cell.

10. A method of configuring a measurement gap, the method comprising:

and setting a restart time point for executing the measurement based on the gap, wherein the condition met by the restart time point is specifically after the terminal acquires the system frame number SFN of the target cell, and after the terminal is switched.

11. The method of claim 10, wherein the condition satisfied by the restart point in time further comprises:

after the gap time set by the target cell.

12. The method of claim 10,

for the handover based on the proprietary preamble, the restart time point specifically is: a time A3 when the terminal receives a dedicated preamble response sent by a target cell, or a time a4 when the terminal receives a handover complete message, or a time a5 when the terminal receives an automatic repeat request HARQ response ACK, or a period when the target cell SFN is read after one or at most 4 times after the time a 5;

for the non-proprietary preamble based handover, the restart time point specifically is: the time a6 when the terminal receives the PDCCH information, or the time B4 when the terminal receives the contention resolution delivered by the target cell, or the time B5 when the terminal sends the HARQ response ACK, or one or at most 4 cycles of reading the SFN of the target cell after B5.

13. A method of configuring a measurement gap, the method comprising:

a terminal acquires a system frame number SFN of a target cell;

and sending a message to inform the target cell so that the target cell performs the measurement based on the gap.

14. A method of configuring a measurement gap, the method comprising:

in the random access procedure of the terminal, when the gap-based measurement is interrupted, a revalidation time for performing the gap-based measurement is set.

15. The method of claim 14,

when the random access process is a proprietary preamble random access process, setting a revalidation time for performing gap-based measurement after the terminal receives a time A3 of a Msg2 proprietary preamble response sent by a target cell, or after the time A3, one or at most 4 cycles of reading the target cell SFN are set;

when the random access process is a non-proprietary preamble random access process, setting a revalidation time for performing gap-based measurement after the terminal receives a time a5 at which the Msg3 automatic repeat request HARQ response ACK sent by the target cell is received, or after a time B4 or B5 at which a random access contention process ends, or after one or at most 4 periods for reading the target cell SFN after the time B5.

16. A method of configuring a measurement gap, the method comprising:

when the terminal judges that an uplink signaling is sent to the base station side of the target cell and random access needs to be executed at the same time, the priority of executing the random access RA process is set to be higher than the priority of executing the measurement process based on gap by the terminal;

and when the terminal judges that the uplink data are to be sent to the base station side of the target cell and simultaneously needs to execute the gap-based measurement process, the terminal sets the priority for executing the gap-based measurement process to be higher than the priority for executing the Random Access (RA) process.

17. The method of claim 16, wherein the method further comprises:

when the terminal performs signaling carried on the signaling radio bearer 2SRB2, the terminal sets the priority for performing the gap-based measurement procedure to be higher than the priority for performing the random access, RA, procedure.

18. The method of claim 16, wherein the method further comprises:

and the base station side of the target cell keeps the priority of the random access RA process.

19. The method of claim 16, wherein the method further comprises:

when the terminal judges that the random access RA process based on the special preamble is adopted, the terminal starts to execute the random access RA process after executing the gap-based measurement so as to avoid the conflict with the gap-based measurement;

when the terminal judges that the random access RA process based on the non-proprietary preamble is adopted, the terminal is set in a preset time period after the measurement based on the gap is finished, and initiates the random access RA process based on the non-proprietary preamble, or the terminal preferentially executes the random access RA process based on the non-proprietary preamble, so that the occurrence of conflict is avoided.

20. The method of claim 18, wherein the method further comprises:

and the base station side of the target cell keeps the priority of the random access RA process.

21. A system, characterized in that the system comprises: the base station configures a target cell of the terminal;

the terminal is used for acquiring the time of a system frame number SFN of a target cell, the time for switching, a gap activation time startSFN set by the target cell and an effective configuration range of the startSFN; calculating the moment of receiving a switching request by a target cell according to the moment of a System Frame Number (SFN) of the target cell and the time used for switching; acquiring an execution range of the startSFN according to the time when the target cell receives the switching request and the effective configuration range of the startSFN, wherein the execution range is used for executing measurement based on gap when the startSFN is in the execution range; judging whether the acquired startSFN is in the execution range, if so, executing measurement based on gap;

and the base station is used for providing the set gap activation time startSFN for the terminal.

22. The system of claim 21, wherein the terminal is further configured to obtain the execution range of the startSFN according to the time when the handover request is received by the target cell, the valid configuration range of the startSFN, and the set redundancy frame.

23. The system of claim 21, wherein the terminal is further configured to refuse to perform the gap-based measurement or send a notification message to the target cell to notify the target cell to start performing the gap-based measurement when it is determined that the startSFN is not within the execution range.

24. The system of claim 21, wherein the terminal is further configured to set a last-arrival time for acquiring a System Frame Number (SFN) of the target cell, the last-arrival time being later than a handover completion time; and acquiring a System Frame Number (SFN) of the target cell before the last arrival time.

25. The system of claim 21, wherein the terminal is further configured to root set a restart time point for performing the gap-based measurement, and the restart time point satisfies a condition specifically after the terminal acquires a system frame number SFN of the target cell and after the terminal handover is completed.

26. The system of claim 21, wherein the terminal is further configured to actively send a message to notify the base station when the terminal acquires a System Frame Number (SFN) of a target cell;

accordingly, the number of the first and second electrodes,

the base station is further configured to perform a gap-based measurement after receiving the message.

27. The system of claim 21, wherein the terminal is further configured to set a revalidation time for performing gap-based measurement during random access of the terminal;

when the random access process is a proprietary preamble random access process, setting the revalidation time for performing gap-based measurement after the terminal receives the Msg 2;

and when the random access process is a non-proprietary preamble random access process, setting the revalidation time for executing gap-based measurement after the terminal receives the response ACK of the Msg3 or after the random access contention process is finished.

28. An apparatus, characterized in that the apparatus comprises:

an obtaining module, configured to obtain, by a terminal, a time of a system frame number SFN of a target cell, a time used for handover, a gap activation time startSFN set by the target cell, and an effective configuration range of the startSFN; calculating the moment of receiving a switching request by a target cell according to the moment of a System Frame Number (SFN) of the target cell and the time used for switching; acquiring an execution range of the startSFN according to the time when the target cell receives the switching request and the effective configuration range of the startSFN, wherein the execution range is used for executing measurement based on gap when the startSFN is in the execution range;

the judging module is used for judging whether the startSFN is in the execution range;

and the execution module is used for executing the measurement based on the gap when the judgment result of the judgment module is yes.

29. The device of claim 28, wherein the acquisition module comprises:

a setting unit for setting a redundant frame;

correspondingly, the obtaining module is further configured to obtain the execution range of the startSFN according to the time when the target cell receives the handover request, the effective configuration range of the startSFN, and the set redundant frame.

30. The apparatus of claim 28, wherein the apparatus further comprises:

and a processing module, configured to send a notification message to the target cell to notify the target cell to start performing the gap-based measurement if the result of the determination by the determining module is that the startSFN is not within the execution range.

31. An apparatus, characterized in that the apparatus comprises:

a first processing module, configured to select a next gap period and start to perform gap-based measurement when the set gap activation time startSFN is before a time point when the device enters the target cell;

a second processing module, configured to send a notification message to a target cell when the set gap activation time startSFN is before a time point when a device enters the target cell, notify the target cell to start performing gap-based measurement, or receive a notification sent by the target cell and start performing gap-based measurement.

32. An apparatus, characterized in that the apparatus comprises:

the SFN last-arrival time setting module is used for setting and acquiring the last-arrival time of the system frame number SFN of the target cell; the last arrival time is later than the switching completion time;

the SFN obtaining module is configured to obtain the system frame number SFN of the target cell before the last arrival time set by the SFN last arrival time setting module.

33. The apparatus of claim 32, wherein the SFN last-dead-time setting module specifically comprises:

the first setting unit is used for setting the time when the equipment executes synchronization as the last arrival time;

a second setting unit, configured to set, for handover based on a dedicated preamble, a time when the device receives a dedicated preamble response sent by a target cell, or a time when the device receives a handover complete message, or a time when the device receives an automatic repeat request HARQ response ACK, as the last arrival time;

a third setting unit, configured to set, for handover based on a non-proprietary preamble, a time when the device receives an automatic repeat request HARQ response ACK, or a time when the device receives PDCCH information of a physical downlink control channel, or a time when the device sends an automatic repeat request HARQ response ACK, as the last-arrival time;

a fourth setting unit, configured to set the last deadline to be one or a period of reading, by at most 4, the target cell SFN after the time when the device receives the HARQ response ACK for the handover based on the dedicated preamble; for the handover based on the non-proprietary preamble, the last arrival time is one or at most 4 cycles of reading the target cell SFN after the time when the device sends the automatic repeat request HARQ response ACK.

34. An apparatus, characterized in that the apparatus comprises:

and the restarting time point setting module is used for setting the restarting time point for executing the measurement based on the gap, and the condition met by the restarting time point is specifically after the equipment acquires the system frame number SFN of the target cell and after the equipment is switched.

35. The device of claim 34, wherein the restart time point setting module is further for

And setting a restart time point for executing the measurement based on the gap, wherein the condition met by the restart time point is specifically that the equipment acquires a System Frame Number (SFN) of the target cell, and after the equipment is switched and the gap time set by the target cell is up.

36. The apparatus of claim 34, wherein the restart time point setting module specifically comprises:

a first setting unit, configured to set, for a handover based on a dedicated preamble, a time when the device receives a dedicated preamble response sent by a target cell, or a time when the device receives a handover complete message, or a time when the device receives an automatic repeat request HARQ response ACK, or a restart time point when one or at most 4 cycles of reading a target cell SFN have elapsed after the time when the device receives the automatic repeat request HARQ response ACK;

a second setting unit, configured to set, for handover based on a non-proprietary preamble, a time at which the device receives PDCCH information, or a time at which the device receives contention resolution delivered by a target cell, or a time at which the device sends an HARQ response ACK, and then a cycle of reading SFN of the target cell is one or more than 4 times after the time at which the device sends the HARQ response ACK is the restart time point.

37. An apparatus, characterized in that the apparatus comprises:

a notification module, configured to actively send a message to notify a target cell after the device acquires a system frame number SFN of the target cell, where the message is used to enable the target cell to perform measurement based on gap after receiving the message;

and the receiving module is used for executing the measurement based on the gap after receiving the notice of the target cell.

38. An apparatus, characterized in that the apparatus comprises:

and the revalidation time setting module is used for setting revalidation time for executing the gap-based measurement in the random access RA process of the equipment.

39. The apparatus according to claim 38, wherein the revalidation time setting module specifically includes:

a first secondary validity time setting unit, configured to set, when the random access RA procedure is a dedicated preamble random access RA procedure, a revalidation time for performing gap-based measurement after a time when the device receives an Msg 2-dedicated preamble response sent by a target cell, or after a time when the device receives an Msg 2-dedicated preamble response sent by a target cell, one or 4 cycles of reading a target cell SFN at most;

a second revalidation time setting unit, configured to set, when the random access RA procedure is a non-proprietary preamble random access RA procedure, revalidation time for performing gap-based measurement after a time when the device receives the Msg3 HARQ response ACK, or after a time when a random access contention procedure ends or a time when the device sends the automatic retransmission request HARQ response ACK, or after a time when the device sends the automatic retransmission request HARQ response ACK, as revalidation time for performing gap-based measurement after one or at most 4 cycles of reading the target cell SFN have passed.

40. An apparatus, characterized in that the apparatus comprises:

a first execution module, configured to set a priority for executing a random access RA procedure higher than a priority for executing a gap-based measurement procedure when it is determined that there is an uplink signaling to be sent to a base station side of a target cell and a random access needs to be executed at the same time;

and a second executing module, configured to set a priority for executing the gap-based measurement procedure higher than a priority for executing the RA procedure when it is determined that there is uplink data to be sent to the base station side of the target cell and at the same time the gap-based measurement procedure needs to be executed.

41. The apparatus of claim 40, wherein the apparatus further comprises:

a third executing module, configured to, when performing signaling carried by the signaling-based radio bearer 2SRB2, set the priority of the gap-based measurement procedure higher than the priority of the random access RA procedure.

42. The apparatus of claim 40, wherein the apparatus further comprises:

the first selection module is used for setting that the random access RA process is executed after a certain time period of the process based on gap measurement when the random access RA process based on the special preamble is adopted, so as to avoid the conflict with the measurement based on the gap;

and a second selection module, configured to, when it is determined that the random access RA procedure based on the non-proprietary preamble is adopted, set in a preset time period after the measurement based on the gap is completed, initiate the random access RA procedure based on the non-proprietary preamble, or the device preferentially executes the random access RA procedure based on the non-proprietary preamble by selecting, so as to avoid a collision.

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