CN101808280A - Method and system for obtaining network side time for terminals - Google Patents
Method and system for obtaining network side time for terminals Download PDFInfo
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Abstract
The invention discloses a method and a system for obtaining network side time for terminals. In the scheme, a network-side network element obtains absolute time information, and transmits the absolute time information a terminal via the prior air-interface common signaling, the terminal reads the absolute time information contained in the prior air-interface common signaling, and determines to receive the network-side standard time at the moment of the prior air-interface common signaling according to the absolute time information, the configured system time corresponding to the absolute time information and the current system time, and in the process of retransmitting the absolute time information, the invention can prevent the change of the content carried by the air-interface common signaling and cannot trigger processes such as system information update and frequent reading of the air-interface common signaling by the hibernating terminal. Since the scheme uses the prior air-interface common signaling to transmit the absolute time information, the UE can accurately obtain the absolute time information under the premise of not changing the prior air-interface message transmission mechanism.
Description
Technical Field
The present invention relates to third generation mobile communication technology, and more particularly, to a method and system for a terminal to obtain network side time.
Background
The mobile terminal acquires the system time information of the network side, and the system time information is depended on by certain services in the communication system. For example, the working goal of Open Mobile Alliance (OMA) Broadcasting (BCAST) is to provide a Service-level solution for Mobile multimedia broadcasting/Mobile television services, and a defined Service Guide (Service Guide) provides channel/program information of multimedia broadcasting/Mobile television services, where some contents are for presentation to a user, such as which programs are in a CCTV1 channel, and start/end times of each program; some of the content is used for controlling the terminal behavior, such as that the data unit (slice) of the news simulcast program is in effect at 19:00 (Valid From), and is out at 19:30 (Valid To), the terminal accesses a certain channel under the control of parameters such as the start time (start time) and the end time (end time) of the configuration window (distribution window) of the schedule data unit (slice), and the service content is presented under the control of parameters such as the start time (start time) and the end time (end time) of the display window (presentation window).
It should be noted that the above mechanism is implemented on the premise that the time of the terminal side can be kept consistent with the system time of the network side, otherwise, the service implementation does not conform to the service expectation. For example, the data unit (slice) of the news simulcast program is effective at 19:00 and invalid at 19:30, but the time set locally by the terminal is different from the system time of the network side by one hour, and the effective and invalid time of the program slice is completely different from the expected service time.
In addition, in some countries and regions, time mechanisms of winter time and summer time are adopted, and the time needs to be updated twice every year at regular intervals, and is advanced or delayed by one hour; the position movement of the terminal is likely to bring about a change in time zone, and in some cases, it is necessary to adjust the time of the terminal to the time of the current area. In these cases, if the user is required to adjust the time by himself, not only the accuracy of the time is reduced due to manual adjustment, but also the user experience is reduced.
In addition, some terminals provide time according to their own clock, but in many cases, the time often cannot meet the user's requirements in terms of accuracy, for example, the time of some terminals needs to be calibrated at least once a day.
Although there are many situations in which a terminal needs to acquire a system time of a network side so that the terminal time is consistent with the system time of the network side, there is no solution in the third generation mobile communication system.
Disclosure of Invention
In view of this, the main objective of the present invention is to provide a method and a system for a terminal to obtain a network side time, so that the terminal can obtain a network side standard time without changing an existing air interface message transmission mechanism.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a method for a terminal to obtain network side time comprises the following steps: a network side network element obtains absolute time information and sends the absolute time information to a terminal through the existing air interface public signaling; and the terminal reads the absolute time information contained in the existing air interface public signaling, and determines the network side standard time of the moment of receiving the existing air interface public signaling according to the absolute time information, the system time corresponding to the configured absolute time information and the current system time.
The obtaining of the absolute time information: realized by a Global Positioning System (GPS); and/or, the obtaining absolute time information comprises: and setting acquisition periods, and acquiring absolute time information when each acquisition period comes.
The existing air interface common signaling is as follows: a multipoint control channel MCCH message, a system broadcast message or a Radio Resource Control (RRC) connection establishment request; further, the MCCH message is a multimedia broadcast and multicast service general indication message.
The method for the terminal to acquire the system time corresponding to the allocated absolute time information comprises the following steps: the method comprises the steps that system time corresponding to default configured allocated absolute time information is stored in a terminal and a network side in advance, the network side obtains the absolute time information when the system time corresponding to the default configured allocated absolute time information arrives, and after the terminal receives an existing air interface public signaling, the stored system time is used as the system time corresponding to the allocated absolute time information according to default setting; or, the system time corresponding to the allocated absolute time information and the absolute time information are sent to the terminal through the existing air interface public signaling, and the terminal reads the existing air interface public signaling and acquires the system time corresponding to the allocated absolute time information sent together with the absolute time information in the existing air interface public signaling.
The method further comprises the following steps: and the network element at the network side sends a time updating message to the terminal and triggers the terminal to read the updated absolute time information contained in the existing air interface public signaling again.
The time update message is: through paging type 1 message or system information change indication message; or, the method is realized by setting all paging indication positions on a multimedia broadcast and multicast service notification indication channel MICH; or, the method is realized by setting a special indication bit arranged on the MICH, wherein the special indication bit is used for indicating whether the standard time on the network side needs to be updated or not.
A system for acquiring network side time by a terminal comprises: the system comprises a network side network element and a terminal, wherein the network side network element is used for acquiring absolute time information and sending the absolute time information to the terminal through the existing air interface public signaling; the terminal is used for receiving the existing air interface public signaling, reading absolute time information contained in the existing air interface public signaling, and determining the network side standard time at the moment of receiving the existing air interface public signaling according to the absolute time information, the system time corresponding to the configured absolute time information and the current system time.
The network side network element is further used for sending the system time corresponding to the allocated absolute time information and the absolute time information to the terminal through the existing air interface public signaling; and the terminal is used for reading the existing air interface public signaling and acquiring the system time corresponding to the allocated absolute time information which is sent together with the absolute time information in the existing air interface public signaling.
The terminal and the network side are used for pre-storing the system time corresponding to the configured absolute time information in default configuration, the network side is used for obtaining the absolute time information when the system time corresponding to the configured absolute time information in default configuration arrives, and the terminal is used for taking the stored system time as the system time corresponding to the configured absolute time information according to default setting after receiving the existing air interface public signaling.
The network side network element is further configured to send a time update message to the terminal.
In the scheme of the invention, a network side network element obtains absolute time information, the absolute time information is sent to a terminal through the existing air interface public signaling, the terminal reads the absolute time information contained in the existing air interface public signaling, and the standard time of the network side at the moment of receiving the existing air interface public signaling is determined according to the absolute time information, the system time corresponding to the configured absolute time information and the current system time, so that the existing irrelevant absolute time system is associated with a timing system commonly maintained by a network and the terminal through the existing air interface public signaling; meanwhile, the scheme of the invention considers the characteristic of periodic repeated transmission of the existing air interface public signaling, and can not change the absolute time information configured in the existing air interface public signaling within a certain time according to the associated corresponding relation; and after the terminal receives the air interface common signaling at different moments, the current network side standard time can be calculated and obtained according to the corresponding relation and the current system time. In the process of repeatedly sending the absolute time information, the change of the content carried by the air interface public signaling can be avoided, and the processes of updating system information, frequently reading the air interface public signaling by a dormant state terminal and the like can not be triggered.
The scheme of the invention is used for transmitting the absolute time information by the existing air interface public signaling, the absolute time information can be transmitted more accurately on the premise of not changing the existing air interface message transmission mechanism, and the terminal can obtain the standard time of the network side through simple calculation to complete the synchronization with the standard time of the network side.
Drawings
FIG. 1 is a flow chart of a terminal acquiring network side time information and synchronizing with network side standard time according to the present invention;
fig. 2 is a diagram illustrating a conventional MCCH message transmission relationship;
fig. 3 is a schematic diagram illustrating absolute time information transmitted through MCCH messages in the present invention;
fig. 4 is a schematic diagram of a system structure in which a terminal acquires network-side time information and synchronizes with network-side standard time in the present invention.
Detailed Description
At present, air interface common signaling is generally transmitted periodically and repeatedly, so that the receiving accuracy of a terminal can be ensured. The time is information which changes every moment, if the current time is directly configured in the air interface public signaling, the content carried by the air interface public signaling is changed, and then the processes of updating system information, frequently reading the air interface public signaling by a dormant state terminal and the like are even triggered. The network and the terminal maintain a set of timing system, namely a system frame number, and the timing system has no relation with an absolute time system; in the invention, two time systems which have no relation are configured and associated through the existing air interface public signaling; meanwhile, the scheme of the invention considers the characteristic of periodic repeated transmission of the existing air interface public signaling, and can not change the absolute time information configured in the existing air interface public signaling within a certain time according to the associated corresponding relation; and after the terminal receives the air interface common signaling at different moments, the standard time of the network side can be obtained according to the corresponding relation and the current system time.
Fig. 1 is a flowchart of the terminal acquiring network side time information and synchronizing with network side standard time in the present invention, and as shown in fig. 1, a specific processing procedure of the terminal acquiring network side time information and synchronizing with network side standard time includes the following steps:
step 101: and the network element at the network side obtains the absolute time information. An acquisition period may be set, and when each acquisition period comes, the network element on the network side acquires absolute time information. The network side network element may obtain accurate absolute time information in a Global Positioning System (GPS) manner or the like. The absolute time information is the exact network-side standard time at which this action is performed.
Step 102: and the network element at the network side sends the absolute time information to the terminal through the existing air interface public signaling. It should be noted here that, except that the absolute time information sent through the existing air interface common signaling for the first time has no time offset from the sending time, the absolute time information sent repeatedly through the existing air interface common signaling for the subsequent time has a certain offset from the sending time. The air interface common signaling includes a system broadcast message, a Multipoint Control Channel (MCCH) message, a Radio Resource Control (RRC) connection establishment request, and the like.
Step 103: and the terminal receives the existing air interface public signaling, reads absolute time information contained in the existing air interface public signaling, and determines the network side standard time of the moment of receiving the existing air interface public signaling according to the absolute time information, the system time corresponding to the configured absolute time information and the current system time. The system time corresponding to the allocated absolute time information is the system time at the moment when the network side executes the absolute time information acquisition. The system time refers to a time represented by a specific form, such as a System Frame Number (SFN), which is maintained by both the network and the terminal.
The system time corresponding to the configured absolute time information can be realized through default configuration, and the system time of the default configuration is stored in the terminal and the network side in advance, so that the network side obtains the absolute time information when the system time of the default configuration arrives in step 101. And after receiving the existing air interface public signaling carrying the absolute time information, the terminal takes the prestored system time as the system time corresponding to the configured absolute time information according to default configuration.
The system time corresponding to the allocated absolute time information can also be realized by display configuration, and the system time corresponding to the allocated absolute time information and the absolute time information are sent to the terminal together through the existing air interface public signaling, so that the terminal reads the existing air interface public signaling and acquires the system time corresponding to the allocated absolute time information sent together with the absolute time information in the existing air interface public signaling.
According to the above description, the scheme of the present invention provides a corresponding relationship between time information content and network side standard time, so that time information configured in the existing air interface common signaling that is repeatedly transmitted is the same, and the terminal can obtain the network side standard time through simple calculation according to the corresponding relationship, so as to implement synchronization with the network side standard time.
For the process shown in fig. 1, its specific implementation is further illustrated by the following examples.
Example 1
Step A1: the network side network element acquires the absolute time information, and the absolute time information can be acquired in a GPS mode and the like.
Step A2: and when the network element at the network side configures the MCCH message, the absolute time information is configured in the MCCH message and is sent. The absolute time information can be configured in the MCCH message for periodic repeated transmission, and the absolute time information repeatedly transmitted through the MCCH message subsequently has a certain offset from the transmission time, except that the absolute time information transmitted through the MCCH message for the first time has no time offset from the transmission time. The MCCH message may be a general multimedia broadcast and multicast service indication (MBMS general information) message, or other types of MCCH messages in a Multimedia Broadcast and Multicast Service (MBMS). For MCCH messages that only transmit absolute time information, the network side does not trigger MBMS notification indicator channel (MICH) or other forms of paging.
The system time corresponding to the allocated absolute time information can be realized through default configuration, the system time of the default configuration can be notified to the terminal by the network side, and the terminal stores the system time of the default configuration in advance. For example, the system time corresponding to the allocated absolute time information is the SFN set in the current SFN cycle, and if the system time corresponding to the allocated absolute time information is the SFN equal to 0, that is, the network side network element obtains the absolute time information when the SFN of the current SFN cycle is equal to 0, where the absolute time information is the network side standard time when the SFN is equal to 0; for another example, the system time corresponding to the allocated absolute time information is the starting time of the current MCCH modification period; for another example, the system time corresponding to the configured absolute time information is the starting time of the current MCCH repetition period, as shown in fig. 2.
The system time corresponding to the allocated absolute time information can also be realized by display allocation, and the specific implementation is as follows: the network element at the network side carries the SFN or the Connection Frame Number (CFN) in the MCCH message, and carries the absolute time information corresponding to the SFN or the CFN, and at this time, the system time corresponding to the allocated absolute time information is the SFN or the CFN in the current SFN or CFN period carried in the MCCH message.
The obtaining period may be set to be the same as the MCCH modification period, so that the network element at the beginning of each MCCH modification period updates the absolute time information according to the obtained current network standard time, and then periodically transmits the absolute time information according to the above description, as shown in fig. 3. The obtaining period may also be set to be the same as the SFN period, that is, the network element on the network side may update the absolute time information after the SFN passes through one SFN period (0-4095). Of course, the acquisition period may be set to other time lengths.
Step A3: after the terminal receives the MCCH message, the absolute time information contained in the MCCH message is read if the terminal is determined not to be synchronized with the standard time of the network side before, and the standard time of the network side at the moment of receiving the existing air interface public signaling is determined according to the absolute time information, the system time corresponding to the configured absolute time information and the current system time, so that the synchronization with the standard time of the network side is realized. If the terminal is synchronized with the network side standard time before, the step may not be executed, so as to avoid the waste of processing resources of the terminal due to frequent synchronization of the terminal with the network side standard time caused by the continuous transmission of the MCCH message containing the absolute time information.
And if the system time corresponding to the configured absolute time information is realized through default configuration, the terminal takes the pre-stored system time as the system time corresponding to the configured absolute time information. According to the description in step a2, the default configuration may be that the system time corresponding to the allocated absolute time information is the radio interface time at which the SFN in the current SFN period is the default value, or the starting radio interface time of the current MCCH modification period, or the starting radio interface time of the MCCH repetition period. If the system time corresponding to the configured absolute time information is realized through display configuration, namely carried in the MCCH message, the terminal reads the system time corresponding to the configured absolute time information carried in the MCCH message.
An exemplary description is given below of a specific implementation of the terminal determining the network-side standard time.
After receiving the absolute time information T1 sent by the network side, the terminal determines the system time corresponding to the absolute time information, namely the wireless interface time, to be SFN1 according to the default configuration or the information carried by the MCCH message; the terminal obtains the current system time of receiving the MCCH message, i.e. the current radio interface time SFN2, and the terminal obtains the network side standard time T2 corresponding to the radio interface time SFN2 of receiving the MCCH message according to the calculation: t2 ═ T1+ (SFN2-SFN 1).
Example two
Step B1: the network side network element acquires the absolute time information, and the absolute time information can be acquired in a GPS mode and the like.
Step B2: when configuring the system broadcast message, the network element at the network side configures the absolute time information in a System Information Block (SIB) and transmits the absolute time information. The absolute time information may be configured to be periodically and repeatedly transmitted in an SIB, and the absolute time information repeatedly transmitted in subsequent SIBs has a certain offset from the transmission time except that the absolute time information transmitted in the SIB for the first time has no time offset from the transmission time. For system broadcast messages with only time information transmission, the network side does not trigger Paging Indication Channel (PICH) or other forms of paging. The above SIB is preferably SIB 15.6.
The system time corresponding to the allocated absolute time information can be realized through default configuration, the system time of the default configuration can be notified to the terminal by the network side, and the terminal stores the system time of the default configuration in advance. For example, the system time corresponding to the allocated absolute time information is the SFN set in the current SFN cycle, and if the system time corresponding to the allocated absolute time information is the SFN equal to 0, that is, the network side network element obtains the absolute time information when the SFN of the current SFN cycle is equal to 0, and the absolute time information is the network side standard time when the SFN is equal to 0.
The system time corresponding to the allocated absolute time information can also be realized by display allocation, and the specific implementation is as follows: the network side network element carries the SFN or CFN in the SIB and carries the absolute time information corresponding to the SFN or CFN, and at this time, the system time corresponding to the configured absolute time information is the SFN or CFN in the current SFN or CFN period carried in the SIB.
Step B3: after receiving the system broadcast message, the terminal determines that the terminal is not synchronized with the standard time of the network side before, reads the absolute time information contained in the SIB, and determines the standard time of the network side at the moment of receiving the existing air interface common signaling according to the absolute time information, the system time corresponding to the configured absolute time information and the current system time, thereby realizing the synchronization with the standard time of the network side. If the terminal has previously synchronized with the network-side standard time, this step may not be performed to avoid wasting processing resources of the terminal due to frequent synchronization of the terminal with the network-side standard time due to the continuous transmission of SIBs containing absolute time information.
And if the system time corresponding to the configured absolute time information is realized by default configuration, the terminal takes the pre-stored system time as the system time corresponding to the configured absolute time information. According to the description of step B2, the default configuration may be the radio interface time at which the system time corresponding to the allocated absolute time information is the default value of the SFN in the current SFN cycle. If the system time corresponding to the configured absolute time information is realized by display configuration, namely carried in the SIB, the terminal reads the system time corresponding to the configured absolute time information carried in the SIB.
Example three
Step C1: the network side network element acquires the absolute time information, and the absolute time information can be acquired in a GPS mode and the like.
Step C2: and when configuring the RRC connection establishment request, the network element at the network side configures the absolute time information in the RRC connection establishment request and sends the absolute time information.
The system time corresponding to the allocated absolute time information can be realized through default configuration, the system time of the default configuration can be notified to the terminal by the network side, and the terminal stores the system time of the default configuration in advance. For example, the system time corresponding to the allocated absolute time information is the SFN set in the current SFN cycle, and if the system time corresponding to the allocated absolute time information is the SFN equal to 0, that is, the network side network element obtains the absolute time information when the current SFN cycle SFN is equal to 0, and the absolute time information is the network side standard time when the SFN is equal to 0.
The system time corresponding to the allocated absolute time information can also be realized by display allocation, and the specific implementation is as follows: the network element at the network side carries the SFN or CFN in the RRC connection establishment request and carries the absolute time information corresponding to the SFN or CFN, and at this time, the system time corresponding to the allocated absolute time information is the SFN or CFN in the current SFN or CFN cycle carried in the RRC connection establishment request.
Step C3: after receiving the RRC connection establishment request, the terminal determines that the terminal is not synchronized with the standard time of the network side before, reads the absolute time information contained in the RRC connection establishment request, and determines the standard time of the network side at the moment of receiving the existing air interface public signaling according to the absolute time information, the system time corresponding to the configured absolute time information and the current system time, so as to realize the synchronization with the standard time of the network side.
And if the system time corresponding to the configured absolute time information is realized by default configuration, the terminal takes the pre-stored system time as the system time corresponding to the configured absolute time information. According to the description of step C2, the default configuration may be the radio interface time at which the system time corresponding to the allocated absolute time information is the default value of the SFN in the current SFN cycle. If the system time corresponding to the configured absolute time information is realized by display configuration, namely carried in the RRC connection establishment request, the terminal reads the system time corresponding to the configured absolute time information carried in the RRC connection establishment request.
In order to avoid repeated execution, the terminal only needs to synchronize with the standard time of the network side once, so that the standard time of the network side is changed when the standard time of the network side needs to be updated, for example, when winter time is changed to summer time, and the terminal needs to update the standard time of the network side. The network element at the network side needs to notify the terminal to re-read the updated absolute time information provided by the network side, so that the network element at the network side can trigger the terminal to re-read the updated absolute time information contained in the existing air interface common signaling by sending a time update message to the terminal, and execute subsequent processing for synchronizing with the standard time at the network side. The time update message may be implemented by initiating a paging type 1(PAGING TYPE 1) message or a SYSTEM INFORMATION CHANGE INDICATION (SYSTEM INFORMATION CHANGE INDICATION) message; or the paging indication can be realized by setting all paging indication positions on the MICH to trigger the terminal to read the updated absolute time information contained in the MCCH message; the MICH can also be provided with a special indication bit for indicating whether the standard time on the network side needs to be updated or not, and the special indication bit is set to indicate that the standard time on the network side needs to be updated.
Fig. 4 is a schematic structural diagram of a system in which a terminal acquires network side time information and synchronizes with a network side standard time in the present invention, as shown in fig. 4, the system at least includes a network side network element and a terminal, where the network side network element is configured to obtain absolute time information and send the absolute time information to the terminal through an existing air interface common signaling; the terminal is used for receiving the existing air interface public signaling, reading absolute time information contained in the existing air interface public signaling, and determining the network side standard time of the moment of receiving the existing air interface public signaling according to the absolute time information, the system time corresponding to the configured absolute time information and the current system time. The network element at the network side is further configured to send the system time corresponding to the allocated absolute time information and the absolute time information to the terminal through the existing air interface common signaling. The terminal may use the pre-stored system time as the system time corresponding to the allocated absolute time information according to a default configuration, or may obtain the system time corresponding to the allocated absolute time information sent together with the absolute time information by reading the received existing air interface common signaling.
The terminal and the network side are used for pre-storing the system time corresponding to the configured absolute time information in default configuration, the network side is used for obtaining the absolute time information when the system time corresponding to the configured absolute time information in default configuration arrives, and the terminal is used for taking the stored system time as the system time corresponding to the configured absolute time information according to default setting after receiving the existing air interface public signaling.
The network element at the network side is further configured to send a time update message to the terminal, and trigger the terminal to re-read the updated absolute time information provided by the network side.
The network side network element comprises: the device comprises a time unit, a configuration unit, a setting unit and a sending unit, wherein the time unit is used for obtaining absolute time information; the configuration unit is used for configuring the absolute time information in the existing air interface public signaling; the setting unit is used for configuring the system time corresponding to the configured absolute time information; the sending unit is used for sending the existing air interface common signaling of the system time containing the absolute time information or the absolute time information and the corresponding absolute time information. The sending unit is further configured to send a time update message to the terminal.
The terminal includes: the system comprises a receiving unit, a reading unit, a system time acquiring unit and a synchronizing unit, wherein the receiving unit is used for receiving the existing air interface common signaling from a network element at a network side; the reading unit is used for reading absolute time information contained in the existing air interface public signaling; the system time acquisition unit is used for acquiring system time corresponding to the allocated absolute time information; and the synchronization unit is used for determining the standard time of the network side at the moment of receiving the existing air interface public signaling according to the absolute time information, the system time corresponding to the configured absolute time information and the current system time. The system time obtaining unit may use a pre-stored system time as the system time corresponding to the allocated absolute time information according to a default configuration, or may obtain the system time corresponding to the allocated absolute time information sent together with the absolute time information by reading a received existing air interface common signaling. The receiving unit is further configured to receive a time update message from a network element on the network side, and trigger the reading unit to prepare to re-read updated absolute time information included in the existing air interface common signaling.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.
Claims (10)
1. A method for a terminal to obtain network side time is characterized in that the method comprises the following steps:
a network side network element obtains absolute time information and sends the absolute time information to a terminal through the existing air interface public signaling;
and the terminal reads the absolute time information contained in the existing air interface public signaling, and determines the network side standard time of the moment of receiving the existing air interface public signaling according to the absolute time information, the system time corresponding to the configured absolute time information and the current system time.
2. The method of claim 1,
the obtaining of the absolute time information: realized by a Global Positioning System (GPS); and/or the presence of a gas in the gas,
the obtaining absolute time information includes: and setting acquisition periods, and acquiring absolute time information when each acquisition period comes.
3. The method of claim 1, wherein the existing air interface common signaling is: a multipoint control channel MCCH message, a system broadcast message or a Radio Resource Control (RRC) connection establishment request;
further, the MCCH message is a multimedia broadcast and multicast service general indication message.
4. The method of claim 1, wherein the method for the terminal to obtain the system time corresponding to the allocated absolute time information comprises:
the method comprises the steps that system time corresponding to default configured allocated absolute time information is stored in a terminal and a network side in advance, the network side obtains the absolute time information when the system time corresponding to the default configured allocated absolute time information arrives, and after the terminal receives an existing air interface public signaling, the stored system time is used as the system time corresponding to the allocated absolute time information according to default setting; or,
and sending the system time corresponding to the allocated absolute time information and the absolute time information to a terminal through the existing air interface public signaling, reading the existing air interface public signaling by the terminal, and acquiring the system time corresponding to the allocated absolute time information which is sent together with the absolute time information in the existing air interface public signaling.
5. The method of any of claims 1 to 4, further comprising: and the network element at the network side sends a time updating message to the terminal and triggers the terminal to read the updated absolute time information contained in the existing air interface public signaling again.
6. The method of claim 5, wherein the time update message is:
through paging type 1 message or system information change indication message; or,
the method is realized by setting all paging indication positions on a multimedia broadcast and multicast service notification indication channel MICH; or,
the method is realized by setting a special indication bit arranged on the MICH, wherein the special indication bit is used for indicating whether the standard time on the network side needs to be updated or not.
7. A system for acquiring network side time by a terminal is characterized by comprising: a network side network element and a terminal, wherein,
the network side network element is used for acquiring absolute time information and sending the absolute time information to a terminal through the existing air interface public signaling;
the terminal is used for receiving the existing air interface public signaling, reading absolute time information contained in the existing air interface public signaling, and determining the network side standard time at the moment of receiving the existing air interface public signaling according to the absolute time information, the system time corresponding to the configured absolute time information and the current system time.
8. The system of claim 7,
the network side network element is further used for sending the system time corresponding to the allocated absolute time information and the absolute time information to the terminal through the existing air interface public signaling;
and the terminal is used for reading the existing air interface public signaling and acquiring the system time corresponding to the allocated absolute time information which is sent together with the absolute time information in the existing air interface public signaling.
9. The system according to claim 7, wherein the terminal and the network side are configured to pre-store the system time corresponding to the configured absolute time information in a default configuration, the network side is configured to obtain the absolute time information when the system time corresponding to the configured absolute time information in the default configuration arrives, and the terminal is configured to use the stored system time as the system time corresponding to the configured absolute time information according to a default setting after receiving the existing air interface common signaling.
10. The system according to any of claims 7 to 9, wherein the network element on the network side is further configured to send a time update message to the terminal.
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| CN200910077475A CN101808280A (en) | 2009-02-13 | 2009-02-13 | Method and system for obtaining network side time for terminals |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2013139180A1 (en) * | 2012-03-22 | 2013-09-26 | 华为终端有限公司 | Daylight saving time configuration method, device, server, and system |
| WO2013185711A1 (en) * | 2012-08-23 | 2013-12-19 | 中兴通讯股份有限公司 | Method, access device, and system for synchronizing time of web ui terminal |
| CN104168103A (en) * | 2014-08-28 | 2014-11-26 | 哈尔滨工程大学 | High-precision network timing method |
| CN106658696A (en) * | 2015-10-29 | 2017-05-10 | 普天信息技术有限公司 | Wireless timing method, wireless timing system and terminal |
| CN110831144A (en) * | 2018-08-09 | 2020-02-21 | 华为技术有限公司 | Communication method and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2013139180A1 (en) * | 2012-03-22 | 2013-09-26 | 华为终端有限公司 | Daylight saving time configuration method, device, server, and system |
| US9383728B2 (en) | 2012-03-22 | 2016-07-05 | Huawei Device Co., Ltd. | Method, device, server, and system for configuring daylight saving time |
| WO2013185711A1 (en) * | 2012-08-23 | 2013-12-19 | 中兴通讯股份有限公司 | Method, access device, and system for synchronizing time of web ui terminal |
| CN103634894A (en) * | 2012-08-23 | 2014-03-12 | 中兴通讯股份有限公司 | Method, access device, and system for synchronizing time of web UI terminal |
| CN104168103A (en) * | 2014-08-28 | 2014-11-26 | 哈尔滨工程大学 | High-precision network timing method |
| CN104168103B (en) * | 2014-08-28 | 2017-10-31 | 哈尔滨工程大学 | A kind of high-accuracy network setting means |
| CN106658696A (en) * | 2015-10-29 | 2017-05-10 | 普天信息技术有限公司 | Wireless timing method, wireless timing system and terminal |
| CN106658696B (en) * | 2015-10-29 | 2019-11-12 | 普天信息技术有限公司 | Wireless time service method and system, terminal |
| CN110831144A (en) * | 2018-08-09 | 2020-02-21 | 华为技术有限公司 | Communication method and device |
| CN112153731A (en) * | 2019-06-27 | 2020-12-29 | 华为技术有限公司 | Clock adjustment method and communication device |
| CN112153731B (en) * | 2019-06-27 | 2022-05-31 | 华为技术有限公司 | Clock adjustment method and communication device |
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