CN101902692B - Method for indicating terminal action time by network side - Google Patents

Abstract

The invention discloses a method for indicating the action time of a terminal on the network side, which solves the problem that the action operation period cannot be indicated when the action operation period is greater than the limited period indication range. The method includes: the network side maintains a reference time period as a ruler, and the reference time period periodically represents time in units of frames; the network side sends configuration information to the terminal, and the configuration information carries period parameters and offsets parameter, the period parameter is used to indicate the number of periods in the reference time period, and the offset parameter is used to indicate the frame number of the terminal where an event occurs within the period indicated by the period parameter.

Description

A method for network side to indicate terminal action time

technical field

The invention relates to the field of mobile communication.

Background technique

In the LTE (Long Term Evolution, long-term evolution) system, the network side will maintain a reference time value SFN (System Frame Number, system frame number), using SFN can achieve a certain length of time to make the network side and the terminal side in the time unit can be synchronized, and realize the synchronous transmission or reception at a specific point in time. The length of SFN is 10bit, which means that the range is 0~1023. Every time a wireless frame passes, the SFN value is increased by 1; the length of a wireless frame is 10ms; the specific value of SFN is broadcast in the cell through system broadcast information, specifically located in In the MIB (Master Information Block, master information block) of the system information (SIB, System Information Block). MIB is the most important information in the system information. The sending period of MIB is 40ms, and it will be sent repeatedly every 10ms within 40ms; and within 40ms, the MIB information sent for the first time and sent repeatedly are exactly the same.

In the LTE system, the length of the SFN is 10 bits. When the MIB bears and sends the 10-bit information, the upper 8 bits of the SFN are directly carried in the MIB as explicit information, and the lower 2-bit information of the SFN is sent implicitly. is not carried in the MIB. The UE learns the specific 10-bit value of the SFN by receiving the MIB. Each frame corresponds to the corresponding SFN value, and the change of the SFN value is accumulated with the arrival of the wireless frame with a fixed step size, and the step size is 1. When the value of SFN reaches 1023, it will return to 0 again.

In the 3G system, the system information sending cycle, paging cycle, measurement cycle, etc. all use SFN as the time scale, and the network will configure the corresponding effective SFN time when instructing the terminal to take action; the terminal will also maintain the same SFN locally as the network When the corresponding SFN time arrives, the corresponding action will be taken.

Specific applications such as: MBMS (Multimedia Broadcast Multicast Service, multimedia broadcast and multicast service) control channel: MCCH is a logical channel that carries MBMS-related control information; MCCH channel configuration information is sent to the terminal through the system information SIB , the SIB will periodically broadcast the configuration information of the MCCH channel, including the mapped physical resource, modulation mode, transmission cycle, transmission frame offset SFN_offset, etc.

MCCH information is sent according to a fixed scheduling cycle. In order to ensure that users who access the system at different times can receive MBMS services, and to facilitate users to receive and combine MCCH information to ensure the accuracy of MCCH information reception, a complete set of MCCH information will be It is transmitted periodically with a "Repetition period"; in addition, a "Modification period" is set, which means that the content of MCCH information can only change during different modification periods, and the modification period is defined as "repetition period". Integer multiples of "period", the content of the information sent in multiple repetition periods within one modification period is the same.

When the service changes (service data is carried on the MTCH), if a new service starts to be transmitted, service configuration parameters change, etc., the system will set the MCCH signaling content in the previous modification cycle. That is to say, according to the MCCH information received in a certain modification period, the UE can know which services will change in the next modification period. Figure 1 shows the scheduling process of MCCH transmission, and different patterns indicate that the service combinations transmitted in different modification periods may be different.

In the prior art, there are two parameters of the MCCH repetition period and modification period configured in the system broadcast message by the network side: m and r. The MCCH modification period is: 2 ^m , and the MCCH repetition period is: 2 ^(mr) . m is (7, 8, 9 or 10), and the corresponding MCCH modification period is (128, 256, 512 or 1024) frames, that is to say, it can be configured as 1.28s, 2.56s, 5.12s or 10.24s; r (0, 1, 2 or 3), it can be configured to send the MCCH signaling content 1, 2, 4 or 8 times within one modification period.

The UE receives the system broadcast message, acquires and stores the above parameters.

When the formula SFN mod 2 ^m =0 is satisfied at a certain moment, in the MCCH modification period, the UE reads the content on the MCCH;

When the formula SFN mod 2 ^(mr) =0 is satisfied at a certain moment, the UE reads the content on the MCCH during the MCCH repetition period.

In the prior art, the network side cannot configure the MCCH modification period to be greater than 10.24 seconds, that is, the length of 1024 radio frames.

Generally speaking, in the prior art, the network side sets a period for an action, and the period cannot be greater than the range indicated by the SFN. Configure SFN_offset when setting the period, indicating the specific frame number for executing the set action in each SFN period; you can also set SFN_offset to the default value, such as 0 for the MCCH channel. If the action occurrence period is shorter, another parameter Period can be configured, and the terminal finds the action occurrence time SFN that meets the requirements by calculating SFN mod Period = SFN_offset.

Since the length of the SFN in the LTE system is 10 bits, and the time unit is 10 ms, one SFN period is 10.24 seconds. When the period of some actions exceeds 10.24 seconds, it cannot be represented. For example: the current SFN=0, the network side wants to notify the UE to report the measurement information at the next 20s; if calculated according to the unit of 10ms, it will need SFN=2000 to indicate the wireless frame of the next 20s; due to the value length of SFN Limit, it is impossible to configure it as 2000, but it will be converted to SFN=976. If the network instructs the UE to report the measurement information when SFN=976 in the configuration information, then the UE will accumulate the SFN and report the measurement information at 9.76s thereafter; this will cause problems.

Contents of the invention

The technical problem to be solved by the present invention is to provide a method for indicating the action time of the terminal on the network side, which solves the problem that it cannot be indicated when the action operation period is greater than the limited period indication range.

In order to solve the above technical problems, the present invention provides a method for the network side to indicate the terminal action time, including:

The network side maintains a reference time period as a ruler, and the reference time period periodically represents time in units of frames;

The network side sends configuration information to the terminal, the configuration information carries a cycle parameter and an offset parameter, the cycle parameter is used to indicate the number of cycles in the reference time period, and the offset parameter is used to indicate that the terminal is in the cycle parameter The frame number at which the event occurred within the indicated period.

Further, the network side sends the configuration information multiple times. As time goes by, every time a reference time period passes, the network side performs a decrement operation on the period parameter, and resends the configuration information. The period parameter carried in the configuration information is the updated period parameter, and the carried offset parameter remains unchanged.

Further, after the terminal receives the configuration information, it saves the period parameter and offset parameter, and learns the time when the event occurs according to the period parameter and offset parameter; when the time when the event occurs, it receives the new configuration information, and save the parameters in the configuration information locally.

Further, the event is any one of the following events: an action specified in the configuration parameter; receiving signaling; service taking effect; service configuration change; service end.

Further, the configuration information is broadcast in the system information, and the system information change caused by the period parameter decrement does not trigger the system information update process.

Further, the network side sends the configuration information multiple times, the period parameter and the offset parameter of each sending remain unchanged, and the terminal receives the configuration information only once.

Further, after receiving the configuration information, the terminal saves the period parameter and the offset parameter therein, and obtains the time when the event occurs according to the period parameter and the offset parameter.

Further, the event is any one of the following events: actions specified in the configuration parameters; receiving signaling, performing measurements, and reporting measurements.

Further, the period parameter and the offset parameter are sent on the following high-layer signaling: system broadcast message, MBMS control channel signaling, radio resource control RRC message.

In order to solve the above problems, the present invention also provides a method for the network side to indicate the terminal action time, including: the network side sends configuration information to the terminal, the configuration information carries a period parameter T and an offset parameter Offset, and the T is used In order to indicate the number of frames included in the event occurrence period, the Offset is used to indicate the frame number of the terminal where the event occurs within the event occurrence period.

Further, after receiving the configuration information, the terminal saves the parameters T and Offset therein, and learns the time when the event occurs according to the T and Offset.

Further, the event is any one of the following events: an action specified in the configuration parameter; receiving signaling; service taking effect; service configuration change; service end.

Further, the T and offset parameters are sent on the following high-layer signaling: system broadcast message, MBMS control channel signaling, radio resource control RRC message.

The method of the present invention is applicable to LTE system, and can also be applied to other communication systems with the same problem. By adopting the method of the invention, time information larger than the range of the limited cycle can be represented, and the amount of configured information is small, the terminal processing is simple, and the configuration and operation of the existing common cycle will not be affected.

Description of drawings

Figure 1 is an example diagram of MCCH information scheduling;

FIG. 2 is a flowchart of UE execution in Embodiment 1 of the present invention;

Fig. 3 is a schematic diagram of ultra-long cycle configuration and processing;

FIG. 4 is a flow chart of UE execution according to Embodiment 2 of the present invention.

Detailed ways

The network side maintains a reference time period as a ruler, and the reference time period represents time periodically in units of frames; the network side sends configuration information to the terminal, and the configuration information carries period parameters and offset parameters, and the period The parameter is used to indicate the number of periods of the reference time period, and the offset parameter is used to indicate the frame number of the terminal where an event occurs within the period indicated by the period parameter.

Or the network side sends configuration information to the terminal, the configuration information carries a period parameter T and an offset parameter Offset, the T is used to indicate the number of frames included in the event occurrence period, and the Offset is used to indicate that the terminal is within the event occurrence period The frame number where the event occurred.

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. In the following embodiments, the SFN is used as the reference time for description.

Example 1

The network side sets the execution time for an action and notifies the UE through control signaling. The time information in the signaling indicates the time difference between the current time and the set execution time; the time information sent by the network side at different times is different. , because as time changes, the above-mentioned time difference is also changing.

If the above-mentioned time difference is greater than the range indicated by SFN, the network side will add the parameter SFN_Num in the setting information, indicating that the terminal is required to perform corresponding actions in the following SFN cycles. The value range can be determined according to the length of the specific action execution cycle. The value is a positive integer (1, 2, 3...), and the time length represented by it is: SFN_Num*10.24 (SFN cycle length) seconds; at the same time, setting SFN_offset according to the existing technology means that in the subsequent SFN_Numth SFN cycle The specific frame number for executing the set action in the frame;

In order to meet the requirements of terminals accessing the system at different times to obtain the period information, the above configuration parameters need to be sent periodically, and the period should be shorter than the SFN cycle;

In this way, when the network side sets a period for an action greater than the range indicated by SFN, by adding a parameter SFN_Num, it is essentially configuring a new counter, which can make this action after a long period of time (SFN_Num*SFN period) at the specified frame (SFN_offset).

The above two parameters, SFN_Num and SFN_offset, can be configured on the message block of the system broadcast message (such as the MCCH configuration message block), or on the MCCH signaling, and can also be configured on other high-level signaling other than the above two messages, such as : RRC (Radio Resource Control, radio resource control) message.

When it is necessary to ensure that UEs receiving the configuration information at different times can perform corresponding actions at the same subsequent time, the network side needs to decrement the SFN_Num value in the configuration information sent in different SFN periods;

As shown in Figure 2, each time the UE receives the configuration parameters, it will save the parameters SFN_offset and SFN_Num, and maintain a counter SFN Num locally. The initial setting is 0; with the increment of the system frame number SFN, the UE judges Once the current system frame number SFN is equal to SFN_offset, the counter SFN_Num_UE will increase by 1, and at the same time judge:

SFN_Num_UE mod SFN_Num is equal to 0, that is to judge whether SFN_Num_UE is equal to SFN_Num, if it is not equal to 0, no action will be taken; if it is equal to 0, start to execute the action specified in the configuration information, reset SFN_Num_UE to 0, and receive a new Configuration information, keep the SFN_Num in the configuration information locally.

Figure 3 is a schematic diagram of ultra-long period configuration and processing, further descriptions are as follows according to Figure 3:

The system configures the period of an action to be 20.48s, and the corresponding number of frames is 2048 frames. The action period here may be a paging period, an MCCH information modification period, or a terminal measurement reporting period, and the like.

The system will transmit the relevant information of the action, which includes SFN_Num (indicating that the terminal is required to perform the corresponding action in the next SFN period) and SFN_offset (indicating the specific frame number of the action in the subsequent SFN_Num SFN period) .

The system needs to configure SFN_Num according to the time interval between the execution time of the action and the current time. If the action will be executed in the second SFN cycle, then SFN_Num needs to be configured as 2; if the action will be executed in the first SFN cycle Execute within a period, then SFN_Num needs to be configured as 1;

After receiving the configuration information, terminal 1 judges the time according to SFN_Num=2 and SFN_offset=127, and compares the locally maintained SFN frame number. SFN_Num_UE1 (initial value of SFN_Num_UE is 0) is added to 1 and then modulo operation is performed with SFN_Num to determine whether the result is equal to 0. If not, it will continue to wait, and SFN_Num_UE1 is 1 at this time;

Continue to judge the time. When the judgment of the next SFN cycle finds that SFN=SFN_offset, add 1 to the locally maintained SFN_Num_UE1, and SFN_Num_UE1=2. If SFN_Num_UE1 mod SFN_Num=0 at this time, it can be determined that the action execution time has arrived, and the corresponding action will be executed. action, and reset the locally maintained SFN_Num_UE1 to 0. At the same time, UE1 needs to receive the configuration information of the action again after completing the action, and update the locally saved SFN_Num according to the SFN_Num parameter given in the configuration information.

Afterwards, the above-mentioned time judging process is continued, and corresponding actions are performed at corresponding times.

The processing procedure for terminal 2 is also the same. After receiving the configuration information, the UE judges the time according to SFN_Num=1 and SFN_offset=127. By comparing the SFN frame number maintained locally, if SFN=SFN_offset, it means that it will enter the next step. In one SFN cycle, add 1 to the locally maintained SFN_Num_UE2 (the initial value of SFN_Num_UE is 0) and perform a modulo operation with SFN_Num, and if the judgment result is equal to 0, then it can be determined that the action execution time has arrived, and the corresponding action will be executed. The locally maintained SFN_Num_UE2 is reset to 0.

At the same time, UE2 needs to receive the configuration information of the action again after completing the action, and update the locally saved SFN_Num according to the SFN_Num parameter given in the configuration information.

Afterwards, the above-mentioned time judging process is continued, and corresponding actions are performed at corresponding times.

Example 2

Embodiment 2 shows another method. The network side indicates the execution cycle of an action in the configuration information, and the terminal performs an action according to the cycle after receiving it; different from Embodiment 1, the network side periodically transmits the above configuration When setting parameters, the SFN_Num will not be decremented, that is to say, the configuration information will remain unchanged. The method in this embodiment is mainly aimed at a scenario that does not require multiple terminals to act at the same time.

The specific implementation process is as follows:

The network side sets the period for an action. If the period is greater than the range indicated by the SFN, the parameter SFN_Num is added when setting the period, indicating that the period of the action includes several SFN periods; specific frame number;

In order for terminals accessing the system at different times to obtain the period information, the above configuration parameters need to be sent periodically, and the period should be shorter than the SFN period, so that UEs entering during the period can obtain the configuration parameters in time and reduce the entry delay;

The network side will transmit corresponding information in the corresponding SFN_offset frame in each SFN cycle, that is to say, the information will be repeatedly transmitted SFN_Num times in one action cycle. However, the UE only receives the same configuration information once.

Similarly, the two parameters SFN_Num and SFN_offset configured in Embodiment 1 are used, as shown in Figure 4, when the UE receives the configuration parameters, it will save the parameters SFN_offset and SFN_Num; and maintain a counter SFN_Num_UE locally, initially set to 0. And receive the information content transmitted by the network side for the first time at the subsequent SFN=SFN_offset time;

After that, as the system frame number increases, the UE judges that once the current system frame number SFN is equal to SFN_offset, the counter SFN_Num_UE will increase by 1, and at the same time judge whether SFN_Num_UE modSFN_Num is equal to 0: if it is not equal to 0, no action is performed; if it is equal to 0, it starts to execute Configured actions, and reset SFN_Num_UE to 0.

Then judge the time according to this method, and execute the corresponding action at the exact time.

The present invention will be described below in combination with the MCCH information sending process. By adopting the present invention, the modification period of the MCCH channel can be extended to more than 10.24s.

The specific implementation process is as follows:

A parameter SFN_Num is added to the MCCH configuration information transmitted in the system information, indicating that the modification period of the MCCH is SFN_Num SFN cycles; other configuration parameters (mapped physical resources, modulation methods, transmission periods, and transmission frame offsets, etc.) are still reserved ; The configuration of the repetition cycle can expand the existing fields according to the size of the modification cycle;

According to the above MCCH configuration information, when the system sends the MCCH channel, it still follows the existing mechanism, and within the modification period, the MCCH information is still repeatedly sent in a repeated period;

The terminal enters the system at a certain moment, and after obtaining the configuration information of the MCCH channel according to the system information, it can read the complete MCCH signaling for the first time at the subsequent SFN_offset time;

After that, according to the SFN_Num in the configuration information, the MCCH signaling is received again after an interval of SFN_Num SFN cycles;

specific:

When the UE receives the configuration parameters, it will save the parameters SFN_offset and SFN_Num; and maintain a counter SFN_Num_UE locally, which is initially set to 0. And receive the information content transmitted by the network side for the first time at the subsequent SFN=SFN_offset time;

After that, as the system frame number increases, the UE judges that once the current system frame number SFN is equal to SFN_offset, the counter SFN_Num_UE will increase by 1, and judges:

SFN_Num_UE mod SFN_Num is equal to 0, if it is not equal to 0, no action is taken; if it is equal to 0, start receiving MCCH signaling, and reset SFN_Num_UE to 0.

Afterwards, the terminal will receive the MCCH signaling in the next large period (i.e. the modification period of the MCCH signaling), and still judge the time according to this method, and receive the MCCH signaling at an accurate time, which can ensure that the terminal can only read Get the corresponding information once.

Using the method described in this embodiment, the terminal can read MCCH signaling once in one MCCH information modification period, and obtain service change information in the next modification period according to the signaling content therein.

Example 3

In some scenarios, the network will periodically broadcast some information. If the information changes infrequently, the network can configure a cycle for the terminal to read information. The cycle can be set according to the frequency of information changes. In the present invention, the cycle can be Greater than 10.24s.

In this information, the terminal will be instructed to take corresponding actions. For example, a certain service will start to be transmitted at a certain time. The terminal can monitor the information periodically to obtain the start time of service transmission and start receiving the service at the start time. . That is to say, in the above process, there are two time indications, one is periodic signaling reception, and the other is service effective time; the indication of periodic signaling reception can adopt the method described in Embodiment 2; the indication of service effective time The method described in Example 1 can be used. In other embodiments, it may also be the time when the service configuration is changed or the time when the service ends, and the method described in Embodiment 1 is also adopted. The method described in Embodiment 2 can be used for the notification of the time of measurement or measurement reporting, as well as the notification of signaling reception.

Describe the application of the present invention in above-mentioned situation in detail below,

The process of configuring the information reading cycle for the terminal on the network side:

Using the two parameters SFN_Num and SFN_offset configured in Embodiment 2, when the UE receives the configuration parameters, it will save the parameters SFN_offset and SFN_Num; and maintain a counter SFN_Num_UE locally, which is initially set to 0. And receive the information content transmitted by the network side for the first time at the subsequent SFN=SFN_offset time;

After that, as the system frame number increases, the UE judges that once the current system frame number SFN is equal to SFN_offset, the counter SFN_Num_UE will increase by 1, and judges whether SFN_Num_UE modSFN_Num is equal to 0: if it is not equal to 0, no action is performed; if it is equal to 0, it starts to execute The configured action is to read the information and reset SFN_Num_UE to 0.

Then judge the time according to the method, and read the information at the exact time.

Still in conjunction with the transmission of MCCH, the specific implementation process is the same as that of Embodiment 2:

The terminal enters the system at a certain moment, and after obtaining the configuration information of the MCCH channel according to the system information, it can read the complete MCCH signaling for the first time at the subsequent SFN_offset time;

After that, according to the SFN_Num in the configuration information, the MCCH signaling is received again after an interval of SFN_Num SFN cycles;

specific:

When the UE receives the configuration parameters, it will save the parameters SFN_offset and SFN_Num; and maintain a counter SFN_Num_UE locally, which is initially set to 0. And receive the information content transmitted by the network side for the first time at the subsequent SFN=SFN_offset time;

After that, as the system frame number increases, the UE judges that once the current system frame number SFN is equal to SFN_offset, the counter SFN_Num_UE will increase by 1, and judges whether SFN_Num_UE modSFN_Num is equal to 0: if it is not equal to 0, no action is taken; if it is equal to 0, start receiving MCCH signaling, and reset SFN_Num_UE to 0.

Afterwards, the time is judged according to the method, and the MCCH signaling is periodically received at the exact time.

The process of configuring the service effective time for the terminal on the network side:

The terminal can read the MCCH signaling once in a MCCH information modification cycle. After reading the signaling content of the MCCH, it will select the service of interest according to the service information in it, and perform corresponding configuration when the allocated time arrives. and receive business.

The configuration mode of the service effective time here is the same as that in Embodiment 1. That is to say, when the system sets the content of the MCCH channel, it will set the parameters SFN_Num_service and SFN_offset_service according to the time interval between the set service effective time and the current time point, indicating that the SFN_offset_service frame in the subsequent SFN_Num_service SFN cycle starts to take effect; For different SFN periods, the configured parameter SFN_Num_service is different, that is, the decrement method in Embodiment 1.

In this way, terminals that receive MCCH signaling at different times can set a counter SFN_Num_service_UE locally with an initial value of 0 according to the parameters SFN_Num_service and SFN_offset_service in the same way as in Embodiment 1; Increment, the UE judges that once the current system frame number SFN is equal to SFN_offset_service, the counter SFN_Num_service_UE will increase by 1, and judge at the same time:

Whether SFN_Num_service_UE mod SFN_Num_service is equal to 0 is to judge whether SFN_Num_service_UE is equal to SFN_Num_service: if it is not equal to 0, no action is taken; if it is equal to 0, start to perform corresponding operations on the service and reset SFN_Num_UE to 0.

Through the above-mentioned second step of processing, multiple terminals can accurately calculate the time when the service takes effect, and all terminals can process the service at the same time.

Example 4

In some scenarios, the network will periodically broadcast some information. If the information does not change frequently, the network can configure a cycle for the terminal to read information. The cycle can be set according to the frequency of information changes. In the present invention, the cycle Can be greater than 10.24s.

In this information, the terminal will be instructed to take corresponding actions. For example, a certain service will start to be transmitted at a certain time. The terminal can monitor the information periodically to obtain the start time of service transmission and start receiving the service at the start time. .

That is to say, in the above process, there are two time indications, one is periodic signaling reception, and the other is service effective time; Step 1 can adopt the method described in Embodiment 1; Step 2 can adopt the method described in Embodiment 1 method. In other embodiments, it may also be the time when the service configuration is changed or the time when the service ends, and the method described in Embodiment 1 is also adopted. The method described in Embodiment 2 can be used for the notification of the time of measurement or measurement reporting, as well as the notification of signaling reception.

Taking the MBMS system as an example below, the application of the present invention in the above situation will be described in detail,

The process of configuring the information reading cycle for the terminal on the network side:

Using the two parameters SFN_Num configured in Embodiment 1 indicates that the terminal is required to perform corresponding actions in the subsequent SFN cycle, and the value range can be determined according to the length of the specific action cycle, and the time length represented by it is: SFN_Num *10.24 (SFN cycle length) seconds; set SFN_offset at the same time, indicating the specific frame number for executing the set action in the subsequent SFN_Numth SFN cycle;

These two parameters, SFN_Num and SFN_offset, can be configured on the message block of the system broadcast message (such as the MCCH configuration message block), or on the MCCH signaling; also on other high-level signaling, such as: RRC message (radio resource control, radio resource control).

When it is necessary to ensure that UEs receiving the configuration information at different times can perform corresponding actions at the same subsequent time, it is necessary to decrement the SFN_Num value in the configuration information sent in different SFN periods;

When the UE receives the configuration parameters, it will save the parameters SFN_offset and SFN_Num; and maintain a counter SFN_Num_UE locally, which is initially set to 0.

As the system frame number SFN increases, the UE judges that once the current system frame number SFN is equal to SFN_offset, the counter SFN_Num_UE will increase by 1, and at the same time judge: whether SFN_Num_UE modSFN_Num is equal to 0, that is, judge whether SFN_Num_UE is equal to SFN_Num: if not equal to 0, No action; if it is equal to 0, start to receive the signaling content periodically sent by the network, and reset SFN_Num_UE to 0. At the same time, new configuration information is received, and the SFN_Num in the configuration information is kept locally.

The network side configures the service effective time for the terminal and the process of terminal execution:

The terminal can start to read the MCCH signaling in one MCCH information modification period. After reading the signaling content of the MCCH, it will select the service of interest according to the service information in it, and perform corresponding configuration and Receive business.

The configuration mode of the service effective time here is the same as that in Embodiment 1.

That is to say, when the system sets the content of the MCCH channel, it will set the parameters SFN_Num_service and SFN_offset_service according to the time interval between the set service effective time and the current time interval, indicating that the SFN_offset_service frame in the subsequent SFN_Num_service SFN cycle starts to take effect;

In different SFN periods, the configured parameter SFN_Num_service is different, that is, the decrement method in Embodiment 1.

In this way, terminals that receive MCCH signaling at different times can set a counter SFN_Num_service_UE locally with an initial value of 0 according to the parameters SFN_Num_service and SFN_offset_service, and using the same method as in Embodiment 1;

As the system frame number SFN increases, the UE judges that once the current system frame number SFN is equal to SFN_offfset_service, the counter SFN_Num_service_UE will increase by 1, and at the same time judge:

Whether SFN_Num_service_UE mod SFN_Num_service is equal to 0 is to judge whether SFN_Num_service_UE is equal to SFN_Num_service: if it is not equal to 0, no action is taken; if it is equal to 0, start to perform corresponding operations on the service and reset SFN_Num_UE to 0.

Through the above-mentioned second step of processing, multiple terminals can accurately calculate the time when the service takes effect, and all terminals can process the service at the same time.

Embodiment 3 is formed by combining Embodiment 2 and Embodiment 1. The method of Embodiment 2 is applicable to UE reading MCCH channel, and the method of Embodiment 1 is applicable to the processing of configuring service effective time in MCCH channel. Both steps of embodiment 4 all adopt the method of embodiment 1.

In the above four embodiments, if the actual configuration period is less than 1024, it is also applicable, and SFN_Num can be set to 0; after receiving the SFN_Num parameter, the terminal finds that its configuration is 0, and no longer sets SFN_Num_UE, and does not judge SFN_Num_UE mod SFN_Num this step. In addition, the parameter SFN_offset can also adopt a default value. If both the network and the terminal know the default value, there is no need to configure the value, and the default value is directly used in judgment.

In Embodiments 1 and 4, if the configuration information is carried in the system message, since the configuration information needs to decrement the SFN_Num value after each SFN cycle, the content of the system message will change during each SFN cycle. There is a process, which causes a system information update process, that will affect all users. When the present invention is applied, it can be stipulated that the system information update process is not triggered due to the system information change caused by the decrement of the SFN_Num value.

Similarly, in Embodiments 3 and 4, since it is necessary to instruct all users to perform corresponding actions when the service becomes effective, the service effective time configured in the MCCH signaling will also change during different SFN cycles. It is also agreed that due to the SFN_Num_service value The change of MCCH information caused by decrement does not trigger the corresponding MCCH update process.

Example 5:

The network side sets the period T for an event, specifically, the number of frames contained in the set period can be represented by the nth power of 2, and the value of n can be determined according to the maximum period of the event; that is to say, a period T In place of the SFN indication event. At the same time, set SFN_offset to indicate the specific frame number of the event occurring in the period T;

After receiving the configuration information, the terminal saves the parameters T and Offset therein, and learns the time when the event occurs according to the T and Offset. The event is any one of the following events: an action specified in the configuration parameter; receiving signaling; service taking effect; service configuration change; service end.

These two parameters: T and SFN_offset, can be configured on the message block of the system broadcast message (such as the MCCH configuration message block), or on the MCCH signaling; also on other high-level signaling, such as: RRC message (radio resource control, wireless resource control).

When the UE receives the configuration parameters, it will save the parameters T and SFN_offset; and maintain a counter SFN_Num_UE locally, which is initially set to 0.

As the system frame number SFN increases, the UE judges that once the current system frame number SFN is equal to SFN_offset, the counter SFN_Num_UE will increase by 1, and at the same time judge:

Whether {SFN+(1024*SFN_Num_UE)}mod T is equal to SFN_offset, if not, no action will be taken; if the equation is true, start to execute the configured action and reset SFN_Num_UE to 0.

Afterwards, according to the above method, it is possible to continue to judge the arrival time of the next cycle.

There is another implementation of the above method:

When the UE receives the configuration parameters, it will save the parameters T and SFN_offset; and maintain a counter SFN_Num_UE locally, which is initially set to 0.

As the system frame number SFN increments, the UE also increments the counter SFN_Num_UE (here SFN_Num_UE is a count for frames, indicating how many frames have passed since now; if the period is longer, the counter needs to reserve a larger bit space) , and judge at the same time: whether {SFN+SFN_Num_UE}mod T is equal to SFN_offset, if not, no action is taken; if the equality is established, start to execute the assigned action, and reset SFN_Num_UE to 0.

Afterwards, according to the above method, it is possible to continue to judge the arrival time of the next cycle.

Embodiment 5 directly uses the period T as a unit of frame, which is different from the previous four embodiments, and the SFN_Num is not added to indicate the number of SFN cycles. Because this method is also achievable; during processing on the UE side, a counter can be configured to calculate the number of SFN cycles, or the counter can be configured to directly calculate the number of SFN frames.

Of course, the present invention can also have other various embodiments, and those skilled in the art can make various corresponding changes and deformations according to the present invention without departing from the spirit and essence of the present invention, but these corresponding Changes and deformations should belong to the scope of protection of the appended claims of the present invention.

In addition to being applied to the LTE system, the present invention can also be applied to other communication systems with the same problem.

Indicating the terminal action time described herein may be understood as indicating the terminal action time of the terminal, or indicating the action time of the terminal network side. The action time can be understood as the time when an event occurs.

Claims (11)

1. a method for indicating terminal action time by network side, is characterized in that,

Network side is safeguarded section fiducial time as scale, and described fiducial time, section was take frame as the unit period cyclic representation time;

Network side sends configuration information to terminal, in described configuration information, carry cycle parameter and offset parameter, described cycle parameter is used to indicate the number in the cycle of section fiducial time, and described offset parameter is used to indicate terminal and occurs within the cycle of this cycle parameter indication the frame number of event;

Network side repeatedly sends described configuration information, As time goes on, every through section cycle fiducial time, network side is carried out decrement operations to cycle parameter, resend configuration information, the cycle parameter carrying in described configuration information is the cycle parameter after upgrading, and the offset parameter carrying is constant.

2. the method for claim 1, is characterized in that,

Described terminal receiving after described configuration information, preserves cycle parameter and offset parameter wherein, knows the time of generation event according to described cycle parameter and offset parameter; After the time of the event of generation arrives, receive new configuration information, and the parameter in configuration information is kept to this locality.

3. method as claimed in claim 2, is characterized in that, described event is any in following event:

The action of specifying in described configuration parameter; Receive signaling; Business comes into force; Business configuration changes; Service ending.

4. the method as described in claim 1,2 or 3, is characterized in that,

Described configuration information is broadcasted in system information, by cycle parameter successively decrease cause not triggering system information updating process of changing system information.

5. the method for claim 1, is characterized in that,

Network side repeatedly sends described configuration information, and each cycle parameter and offset parameter sending is constant, and terminal receives only once described configuration information.

6. method as claimed in claim 5, is characterized in that,

Described terminal receiving after described configuration information, preserves cycle parameter and offset parameter wherein, knows the time of generation event according to described cycle parameter and offset parameter.

7. method as claimed in claim 6, is characterized in that, described event is any in following event:

The action of specifying in described configuration parameter; Receive signaling, measure, measure and report.

8. the method for claim 1, is characterized in that, described cycle parameter and offset parameter send on following high-level signaling:

System broadcast message, MBMS control channel signaling, radio resource control RRC message.

9. a method for indicating terminal action time by network side, is characterized in that,

Network side sends configuration information to terminal, carries cycle parameter T and offset parameter Offset in described configuration information, and described T is used to indicate the frame number that event generating period comprises, and described Offset is used to indicate terminal and occurs in event generating period the frame number of event;

Terminal receiving after described configuration information, preserves parameter T and Offset wherein, knows the time of generation event according to described T and Offset.

10. method as claimed in claim 9, is characterized in that, described event is any in following event:

The action of specifying in described configuration parameter; Receive signaling; Business comes into force; Business configuration changes; Service ending.

11. methods as claimed in claim 9, is characterized in that, described T and offset parameter send on following high-level signaling:

System broadcast message, MBMS control channel signaling, radio resource control RRC message.

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